Abstract: A spray nozzle that includes a nozzle body defining a first surface, a cap defining a second surface able to define an annular nozzle opening therebetween, a turbine having a plurality of radially extending fins circumferentially positioned about the nozzle opening for directing the flow of fluid exiting the nozzle opening, and a reverser member including a cup portion positioned below the cap to intercept the flow of fluid from a flow passage of the cap. The reverser member coupled to the turbine such that the reverser member is caused to rotate in response to rotation of the turbine.

Abstract: Systems and methods for two-component mixing in a jetting dispenser are provided herein. A jetting dispenser includes a fluid chamber having a first fluid inlet providing a first fluid and a second fluid inlet providing a second fluid, wherein the first fluid and the second fluid mix within the fluid chamber into a mixed fluid. A method for dispensing a mixed fluid from a dispenser having a fluid chamber in fluid communication with first and second fluid inlets is also provided. A first fluid is provided to the fluid chamber via the first fluid inlet and a second fluid is provided to the fluid chamber via the second fluid inlet. At least a portion of a valve element is moved relative to a valve seat to cause dynamic mixing of the first fluid and the second fluid within the fluid chamber to produce the mixed fluid that is dispensed.

Abstract: An ink absorbing member accommodation container includes: an accommodation container that has an accommodation space for accommodating an ink absorbing member containing water-absorbable resin capable of absorbing ink inside the accommodation container and that includes an inlet port through which the ink flows into the accommodation space; and a flying preventing mechanism that prevents a constituent material of the ink absorbing member from flying from the inlet port to an outside of the accommodation container.

Abstract: Systems, apparatus and methods for providing air and water to hot tub jets. The present teachings include jet assemblies, manifold assemblies, and related components, as well as methods of assembling hot tubs involving these components. In some cases, the present teachings describe the use of dual extrusion tubing to route air and water through adjacent, connected fluid conduits. In some cases, the present teachings describe a “press-and-click” method of connecting various components.

Abstract: A water outlet mechanism, includes at least two diversion waterway sets connected to the water source and an outlet, each diversion waterway set has at least two diversion waterways and at least two water diversion passages; water from the at least two diversion waterways impact and converge and then enter the water diversion passages, the flowing direction of the at least two water diversion passages intersect, and water from the at least two water diversion passages impact and then spray out of the outlet. Water from at least two diversion waterways impacts and converges and then enters the water diversion passage, the water particles are refined and shaken; the direction of the at least two water diversion passages intersect, and water in the cavity of the inlet impact again to form wavy water type and then sprays out of the outlet.

Abstract: A device and method for cleaning a surface using dry steam is disclosed. A dry steam wand is fitted with a custom nozzle that permits the dry steam to be angled to clean difficult to access surfaces of a gas turbine. The nozzle includes a slit that is configured to maintain sufficient temperature and pressure to effectively remove contaminants found on gas turbines.

Abstract: A combustion management device for generating a thrust burst to impart a physical impulse. In operation, a combustion chamber, defined by a valve unit (33), is primed to a set pressure and fueled by fuel injectors (23). An ignitor (22) then initiates combustion. Under force of combustion, the valve unit is moved, pulling an exhaust valve (18) from an exhaust port (16), releasing combustion products as thrust. Work may be derived from the travel of the valve unit, independent of the thrust generated. After combustion, a return mechanism returns the valve unit to the start position, ready to repeat the process. Simple design, and valve operations needing little more than pressure differentials to function, make for simplified construction, and more modular applications.

Abstract: A pulsating high pressure air and water nozzle is disclosed. The nozzle includes an impeller adapted to rotate about an axis, a housing adapted to secure the impeller therein, and a supply conduit secured to the housing. The supply conduit is orientated to direct a stream of pressurized fluid to impact the impeller to cause the impeller to rotate. The nozzle also includes a discharge port secured to the housing and is adapted to discharge a pulsating stream of fluid directly from the housing. The impeller includes a plurality of radial spaced vanes secured to a hub, where a cavity is disposed between each vane of the plurality of vanes. The plurality of vanes is adapted to intermittently block the discharge port as the impeller rotates. In addition, the nozzle includes a cover adapted to be removably secured to the housing to access an inside of the housing.

Abstract: A fogging device for disinfecting an enclosed area with an atomized disinfectant fluid may include a housing, and an atomizing disinfectant generator carried by the housing and including a disinfectant fluid reservoir, a compressor coupled to the disinfectant fluid reservoir, and an atomizing nozzle in fluid communication with the disinfectant fluid reservoir. A first processor may be carried by the housing and coupled to the compressor and configured to perform a treatment cycle during which the compressor is operated to dispense atomized disinfectant fluid from the disinfectant fluid reservoir into the enclosed area via the atomizing nozzle. The treatment cycle may include a saturation phase wherein the compressor operates to dispense atomized disinfectant fluid continuously to bring the enclosed area to a target saturation level, and a pulse phase wherein the compressor operates to intermittently dispense atomized disinfectant fluid to maintain the enclosed area at the target saturation level.

Abstract: A disrupter cannon and a reducer for increasing a pressure of water expelled from the disrupter cannon to disable an explosive device housed in a hardened container.

Abstract: A dual turbine showerhead provides multiple spray modes emanating from the head. The showerhead includes an inlet orifice, a backplate, a first turbine located side-by-side with a second turbine, a faceplate forming a first orifice group and a second orifice group, a first fluid channel in fluid communication with the first and second turbines and the first orifice group, and a second fluid channel in fluid communication with the second orifice group. In another embodiment, the showerhead includes first and a second turbines located side-by-side and a valve body that channels a fluid to the first turbine and the second turbine. In another embodiment, the showerhead includes a first and a second turbine located side-by-side along a centerline of the showerhead, a corresponding outlet region is arranged along the centerline and additional outlet regions are laterally spaced therefrom.

Abstract: A system for treating an enclosed area may include a plurality of fogging devices each including a housing, a fluid reservoir, a compressor coupled to the fluid reservoir, an atomizing nozzle in fluid communication with the fluid reservoir, a first wireless transceiver, and a first processor coupled to the compressor and the wireless transceiver. A wireless communications device may include a second wireless transceiver and a second processor to identify the fogging devices within the enclosed area based upon the first and second wireless transceivers, determine respective fogging times for the fogging devices based upon a size of the enclosed area and a number of the foggers identified within the enclosed area, and initiate a treatment cycle during which, on a coordinated schedule, the first processor of each fogging device causes its associated compressor to dispense fluid into the enclosed area via the atomizing nozzle for the respective fogging time.

Abstract: A compressed-gas motor has a cylindrical inner chamber closed gas-tight at a first base surface, and a piston arranged so as to be movable along the cylinder axis in the cylindrical inner chamber. A first opening feeds a compressed gas into the inner chamber, and a second opening discharges a gas from inside the inner chamber. The openings are arranged in the cylinder casing of the cylindrical inner chamber, wherein the first opening is arranged between the second opening and the closed first base surface. The first opening is closable by a first piston part and the second opening by a second piston part. The compressed-gas motor has a resetting device which exerts a force on the piston in the direction of the first base surface of the cylindrical inner chamber if the second piston part does not completely close the second opening.

Abstract: Micropores penetrating a vibration plate 12 in a thickness direction thereof are formed, in which the vibration plate 12 atomizes a solution by vibration of a piezoelectric vibrator 11 that generates ultrasonic vibration when current is applied thereto. In addition, the spraying time and the spraying interval time are controlled by turning on or off the current applied to the piezoelectric vibrator 11, such that a value of [50% particle diameter of spray particles in cumulative volume distribution]×([spraying time]/[spraying interval time]) becomes 0.2 to 2.5 ?m.

Abstract: A method of producing micronized sulphur wherein elemental sulphur is dissolved in a solvent for sulphur to produce a sulphur-solvent solution and precipitation of the dissolved sulphur is effected or controlled by manipulation of at least one of pressure, temperature or water content in the solvent to produce the micronized sulphur.

Abstract: A nozzle comprising a thin, flexible substantially planar polymeric film having a plurality of pores with structures allowing for generation of an aerosol at reduced extrusion pressure is disclosed. The pores can comprise at least two sections, or steps, in which the thickness of the membrane is reduced in stepwise fashion, or the pores can be tapered. Nozzles formed comprising pores having such structures permit aerosol generation at lower extrusion pressures, thereby allowing for decreased weight of aerosolization devices, increased efficiency, increased portability and increased battery life. The pore structures also allow for the use of thicker, more easily processed polymeric films in manufacturing while having a thinner, more efficient aerosolization area. The use of decreased extrusion pressures also results in increased uniformity in aerosol generation and improved reliability of other components.

Abstract: A dishwasher includes a tub at least partially defining a treating chamber and a spraying system for supplying liquid to the treating chamber. The spraying system includes a sprayer having a body with an interior, a liquid passage provided in the interior, and an outlet extending through the body and in fluid communication with the liquid passage. A fluid coupling defines a duration of a fluid communication between an opening of a valve body and the outlet.

Abstract: There is disclosed a piezoelectric droplet maker that is driven at high frequency and energized with high power and high frequency Operational Amplifier (OP-AMP) electronics. The droplet maker implements a method of producing jets of uniform droplets of solution precursors (or any other homogeneous liquids). The formation of droplets results from stream break up due to the disturbance of liquid jets by the piezo actuator as they leave an orifice. This disturbance can be electronically tuned to produce uniform droplets with high repeatability. In another aspect, the droplet maker can be used to inject axially uniform diameter solution precursor droplets into process gas flow of a microwave plasma apparatus.

Abstract: A fluid injection device includes a fluid supply unit that accommodates and supplies fluid, a fluid injection unit that injects fluid supplied from the fluid supply unit, and a driving waveform generating device which is equipped with at least one adjusting device, a one-input multiple-control parameter changing unit that simultaneously changes plural control parameters for determining a fluid injection condition of the fluid injection unit on the basis of a signal from the at least one adjusting device, and a driving waveform generator that generates and outputs a driving waveform of the fluid injection unit on the basis of the control parameters set by the one-input multiple-control parameter changing unit.

Abstract: A device for impulse ejection of a medium is provided having an ejection tube for the medium to be ejected therefrom through an ejection end of the ejection tube by way of a propellant in pulsed fashion in an ejection direction. The device further includes a membrane in the area of the ejection end, the membrane being elastically deformable during ejection of medium for forming a penetration opening for the medium, and a nozzle element in the ejection tube. The nozzle element is adapted to be movable along the ejection direction between a rest position and an ejection position, wherein the nozzle element effects a deformation of the membrane in the ejection position to form the penetration opening. A method of impulse ejection and a membrane for a device for impulse ejection of medium, and a method for increasing the range of an impulse ejection of medium are also provided.

Abstract: A water jet device and a water dance speaker comprising the water jet device are disclosed. The water jet device comprises a base container, a drive unit and fans driven by the drive unit, the drive unit being mounted externally to a bottom of the base container, while the fans internally to the bottom of the base container. A cover plate, disposed on the base container to engage therewith, comprises via holes thereon and coordinates with the base container to form a chamber to contain liquids. On the side of the cover plate away from the base container are formed protrusions vertical to the cover plate, a first via hole penetrating each of the protrusions. The present invention provides a water jet device capable of recycling water resources and preventing water leak. Therefore, the water jet device as disclosed is safe in use and possesses practical applicability.

Abstract: A device and method for dispensing a liquid with a gas includes an instrument having a cannula and a low-pressure tip. The low-pressure tip includes a tip housing that at least partially defines a high pressure chamber. A distal wall of the tip housing includes an aperture in fluid communication with the high pressure chamber. The low-pressure tip also includes a tube and a gas flow channel. The tube fluidly communicates liquid at a relatively low pressure from the cannula through the first aperture. The gas flow channel fluidly communicates gas from the cannula at a relatively high pressure and to the high pressure chamber for discharge from the aperture. The tube and aperture are adapted to dispense the liquid and the gas in order to create a low pressure zone distal of the tube to dispense droplets of the liquid.

Abstract: A liquid ejecting head includes a flow-path forming substrate including pressure generation chambers that communicate with nozzle openings through which ink is ejected, a piezoelectric element that applies a pressure to the pressure generation chambers via a diaphragm, and a protection substrate that forms a sealed space for sealing the piezoelectric element, in which a pressure in the sealed space is adjusted such that the diaphragm is drawn up to the piezoelectric element side and an initial bent position of the diaphragm is adjusted.

Abstract: A hyper-pressure water cannon, or pulse excavator, is able to discharge fluid pulses at extremely high velocities to fracture a rock face in excavation applications. A compressed water cannon can be used to generate hyper-pressure pulses by discharging the pulse into a straight nozzle section which leads to a convergent tapered nozzle. The hyper-pressure water cannon design is relatively compact, and the pulse generator can readily be maneuvered to cover the face of an excavation as part of a mobile mining system.

Abstract: Electrorheological fluids and methods include changes in liquid-like materials that can flow like milk and subsequently form solid-like structures under applied electric fields; e.g., about 1 kV/mm. Such fluids can be used in various ways as smart suspensions, including uses in automotive, defense, and civil engineering applications. Electrorheological fluids and methods include one or more polar molecule substituted polyhedral silsesquioxanes (e.g., sulfonated polyhedral silsesquioxanes) and one or more oils (e.g., silicone oil), where the fluid can be subjected to an electric field.

Abstract: A rotating sprinkler for intermittently emitting a liquid supplied by a pulsating device that forms pulses that have a beginning and an end. The sprinkler has a rotating portion that can rotate about an axis while emitting the liquid pulses to the outside environment. The sprinkler provides for rotation of the rotating portion during a portion of each pulse and for stopping rotation of the rotating portion during another portion of the pulse.

Abstract: An injection valve includes an injector component having an injector body including a recess hydraulically coupled to a high-pressure circuit of a fluid, and a nozzle needle moveably disposed injector body recess for preventing fluid flow through at least one injection opening in a closed position, and otherwise for releasing the fluid flow; an actuator unit disposed in the injector body recess and having an actuator element disposed in an actuator housing including an end face at an axial end facing the injection opening, which end face is mechanically coupled to a stage implemented in the injector body via a ring element disposed axially between the end face and the stage. At least two radial through passages are disposed opposite each other in the ring element, designed for hydraulically coupling between a ring interior disposed within the ring element and a ring exterior disposed outside of the ring element.

Abstract: A liquid ejection device includes: a liquid chamber with a variable inside volume; a volume varying unit which varies the volume inside the liquid chamber according to a drive signal; a volume changing unit which changes a representative volume of the liquid chamber; an ejection tube having an ejection port for ejecting a liquid from the liquid chamber; and a control unit which controls the volume varying unit and the volume changing unit and thereby adjusts pressure inside the liquid chamber. The control unit changes the representative volume according to a moving speed of the ejection port.

Abstract: A liquid is supplied to a liquid chamber, the pressure in a liquid chamber fluctuates according to a drive signal, and the liquid of the liquid chamber is ejected from an ejection port at the tip of an ejection pipe by fluctuation of the pressure in the liquid chamber. At this time, the relationship between the amount of variation of the moving speed of the ejection port and the amount of change of a parameter (drive signal) involved in fluctuation of the state of the liquid ejected from the ejection port is set, and the parameter is changed according to the relative speed of the ejection port using the set relationship.

Abstract: A liquid flow monitoring device for monitoring the supply of liquid to a spray nozzle including a deflectable check valve in a liquid supply passage to the spray nozzle, a light sensing device having a light emitter and a light receiver disposed on opposite sides of the check valve, the check valve being deflectable into at least partially obstructing relation to a light beam directed from the light emitter to the light receiver as an incident to liquid flow through the monitoring device to the spray nozzle, and a control system for receiving signals from the sensing device.

Abstract: A method for determining the optimum inlet geometry of a liquid rocket engine swirl injector includes obtaining a throttleable level phase value, volume flow rate, chamber pressure, liquid propellant density, inlet injector pressure, desired target spray angle and desired target optimum delta pressure value between an inlet and a chamber for a plurality of engine stages. The method calculates the tangential inlet area for each throttleable stage. The method also uses correlation between the tangential inlet areas and delta pressure values to calculate the spring displacement and variable inlet geometry of a liquid rocket engine swirl injector.

Abstract: A liquid ejecting apparatus includes: an inflow channel to which liquid is supplied; an outflow channel communicated with a nozzle; a liquid chamber formed with a spiral flow channel having a substantially constant cross-sectional area between the inflow channel and the outflow channel and having a given volume; a volume changing portion configured to deform the liquid chamber so as to change the volume of the liquid chamber to a volume smaller than the given volume; and an ejection control unit configured to cause the liquid to be ejected from the nozzle in a pulsed manner by driving the volume changing portion in a state in which the liquid chamber is filled with the liquid.

Abstract: The present invention discloses a massage shower that can achieve the dynamic switch of the water flow, it comprises a hollow essential body, a oblique water body, a impeller that is under the said oblique water body, a face cover component that has the effluent holes and a moving plate used to switch the effluent holes of different areas in the face cover component, the said impeller and the said moving plate are connected through a differential gearing transmission retarding mechanism. The said massage shower can achieve the dynamic switch of different effluent holes on the face cover of the shower during the using process, and achieve excellent massage effect.

Abstract: Apparatus for operating a group of normally closed, pressure compensated drippers at relatively low liquid flow rates includes a pulsating device having an inlet and an outlet that converts a low continuous liquid flow rate entering its inlet, through a flow control unit, to a high intermittent and pulsating flow rate ejected through its outlet. A manifold has an inlet connected to the outlet of the pulsating device, a group of normally-closed, pressure-compensated drippers being connected to the manifold. The pulsating device converts a low continuous flow rate of liquid entering its inlet, through the flow control unit, to a high intermittent and pulsating flow rate that ejects from its outlet and flows from its outlet through the manifold inlet and through the normally-closed, pressure-compensated group of drippers connected to the manifold, out from the drippers, at a pressure-compensated low flow rate.

Abstract: An agricultural sprayer spray head is adapted for being mounted to a spray boom together with a plurality of like, equally spaced spray heads. Each spray head includes a body containing a flow control member mounted for rotation about an axis and including a fluid control passage arrangement located for effecting an intermittent connection between a fluid inlet leading to, and an outlet leading from the body as the control member is oscillated or rotated by a powered motor so as to effect a pulsing flow through said control passage arrangement. The powered motor operates at a speed controlled by various input parameters including vehicle speed and field and crop conditions so as to maintain a desired spray application rate.

Abstract: An electrospray apparatus for dispensing a controlled volume of liquid in pulses at a constant frequency is provided. The apparatus comprises an emitter (70) having a spray area from which liquid can be sprayed, a means for applying an electric field (78) to liquid in, on or adjacent to the emitter (70). In use, liquid is drawn to the spray area by electrostatic forces and electrospray occurs in pulses at a constant frequency whilst the electric field (78) is applied.

Abstract: A fluid sprayer is provided and includes a fluid pump assembly having an outlet path and a motor assembly configured to drive the fluid pump assembly to pressurize fluid. The motor assembly is controlled by a throttle mechanism. The fluid sprayer also includes a fluid pressure control assembly including a mechanical pressure transducer configured to be displaced as a function of fluid pressure in the outlet path. The fluid pressure control assembly is configured to control the throttle mechanism as a function of displacement of the mechanical pressure transducer.

Abstract: Apparatus for operating a group of normally closed, pressure compensated drippers at relatively low liquid flow rates includes a pulsating device having an inlet and an outlet that converts a low continuous liquid flow rate entering its inlet, through a flow control unit, to a high intermittent and pulsating flow rate ejected through its outlet. A manifold has an inlet connected to the outlet of the pulsating device, a group of normally-closed, pressure-compensated drippers being connected to the manifold. The pulsating device converts a low continuous flow rate of liquid entering its inlet, through the flow control unit, to a high intermittent and pulsating flow rate that ejects from its outlet and flows from its outlet through the manifold inlet and through the normally-closed, pressure-compensated group of drippers connected to the manifold, out from the drippers, at a pressure-compensated low flow rate.

Abstract: A fluid injection device includes: a pulse generation section that includes a fluid chamber whose volume is changeable, and an inlet flow passage and an outlet flow passage that are connected to the fluid chamber; a first connection flow passage connected to the outlet flow passage, having an end portion; a second connection flow passage connected to the inlet flow passage; a fluid injection opening formed at the end portion of the first connection flow passage, having a diameter smaller than the diameter of the outlet flow passage; a connection flow passage tube including the first connection flow passage and having rigidity adequate to transmit pulses of fluid flowing from the fluid chamber to the fluid injection opening; and a pressure generation section that supplies fluid to the inlet flow passage.

Abstract: A liquid atomizer (1) with battery-powered (1) piezoelectric vibration device (4), of the type timed to occur between alternate activation cycles and rest cycles and including a first electronic supply circuit (2) with an impulse current generator (9) at a relatively high voltage and a second supply circuit (5a) of the piezoelectric vibration device (4) at a relatively low voltage, as well as a switch device (10, 11) apt to connect in alternate phases the supply of the piezoelectric vibration device (4)—in a same actuation cycle—to the first circuit and to the second circuit. An actuation method of the atomizer is also described.

Abstract: A pulsating device has a chamber for receiving liquid entering the device and gas that occupies an initial volume in the chamber. The liquid entering the chamber compresses the gas and decreases the volume occupied by the gas, thereby increasing the pressure in the chamber. A valve is provided to open above a first threshold pressure to begin a pulse of liquid. The valve closes below a second threshold pressure to end the pulse. The pulsating device has an outlet gate that permits liquid in the chamber to exit the chamber when the pressure in the chamber is greater than the pressure outside the chamber.

Abstract: Reliably and quickly acting device that can be cheaply employed for monitoring the flow of water vapor, having a water vapor line extending between a switching valve and a cross-section connection, in particular a nozzle, and a temperature sensor monitoring the temperature in the line.

Abstract: A hollow actuator-driven droplet dispensing apparatus may include an elastic tube having an elastic body, defining a storage space therein, and extending a predetermined length, and a hollow actuator fitted around the elastic tube so as to generate a force and a displacement in the longitudinal direction when an electric field is applied. The hollow actuator is expanded or contracted in the longitudinal direction of the elastic tube when the external voltage is applied, thereby reducing or enlarging the volume of an inner space of the elastic tube. The droplet dispensing apparatus can press the elastic tube to expand or contract the volume of the inner space of the tube using the hollow actuator capable of quickly generating a displacement in response to an application voltage so that a fixed amount of content can be discharged out and taken into the tube.

Abstract: The invention concerns a handheld, dynamically movable surface spattering device (9), comprising at least one nozzle means (1) for an expelling of a spattering material onto a target surface (3) and a nozzle control mechanism (4) to control characteristics of the expelling of the nozzle means. Furthermore, it comprises a spattering material supply (5), a storage with desired spattering data (6), which is predefined and comprised in a digital image or CAD-model memorized on the storage, a spatial referencing unit (7), to reference the spattering device relative to the target surface and a computation means (8) to automatically control the expelling by the nozzle control mechanism according to information gained by the spatial referencing unit and according to the desired spattering data is evaluated and adjusted by changing the characteristics of expelling of the nozzle means in such a way that the target surface is spattered according to the desired spattering data.

Abstract: A method for providing a photoresist includes providing a pressure reducing and increasing device connected to a photoresist storage bottle and a photoresist supply tank; and performing a pressure reducing step to create a suction force to move a photoresist from the photoresist storage bottle into the photoresist supply tank.

Abstract: A control system is disclosed for regulating the flow of a liquid from a liquid provider through a liquid distribution system. The distribution system has a major liquid distribution channel connected to a plurality of minor liquid distribution channels providing the liquid to a multiplicity of users. A plurality of controllable user valves are interposed in the multiplicity of user channels. A liquid monitor senses a liquid flow characteristic within the liquid distribution channel. A user control changes selective controllable user valves for restoring a desired liquid flow characteristic within the liquid distribution channel.

Abstract: An agricultural sprayer (1) with a pump (20), a plurality of nozzles, a valve arrangement (28) associated with the nozzles and a feed conduit (25). The valve arrangement (28) selectively connects the feed conduit (25) to a bypass conduit (26) or to the nozzles. A return conduit (32) branches off from the feed conduit (25). A regulation valve (30) applies a variable degree of throttling to the fluid flowing through the return conduit. A pressure sensor (41) provides a signal for fluid delivered to the valve arrangement. A flow sensor (42) provides a signal representing the flow in the feed conduit (25). A controller (50) is in receipt of the sensor signals, receives instructions from an operator and controls the regulation valve (30) using the instructions from the operator and available measured signals using feedback control loops combined with a feed forward signal.

Abstract: An agricultural sprayer (1) with a pump (20), a plurality of nozzles, a valve arrangement (28) associated with the nozzles and a feed conduit (25). The valve arrangement (28) selectively connects the feed conduit (25) to a bypass conduit (26) or to the nozzles. A return conduit (32) branches off from the feed conduit (25). A regulation valve (30) applies a variable degree of throttling to the fluid flowing through the return conduit. A pressure sensor (41) provides a signal for fluid delivered to the valve arrangement. A flow sensor (42) provides a signal representing the flow in the feed conduit (25). A controller (50) is in receipt of the sensor signals, receives instructions from an operator and controls the regulation valve (30) using the instructions from the operator and available measured signals using feedback control loops combined with a feed forward signal.

Abstract: A synthetic jet includes a first backer structure and a first actuator coupled to the first backer structure to form a first composite unit. The synthetic jet also includes a second backer structure, and a second actuator coupled to the second backer structure to form a second composite unit. A wall member is coupled to and positioned between the first and second backer structures to form a cavity. The first composite unit has an orifice formed therethrough and the orifice is fluidically coupled to the cavity and fluidically coupled to an environment external to the cavity.

Abstract: A synthetic jet includes a first backer structure and a first actuator coupled to the first backer structure to form a first composite unit. The synthetic jet also includes a second backer structure, and a second actuator coupled to the second backer structure to form a second composite unit. A wall member is coupled to and positioned between the first and second backer structures to form a cavity. The first composite unit has an orifice formed therethrough and the orifice is fluidically coupled to the cavity and fluidically coupled to an environment external to the cavity.