Abstract: An evacuator is disclosed, and includes a body defining a central axis, a converging motive section, a diverging discharge section, at least one suction port, and at least one Venturi gap. The Venturi gap is located between an outlet end of the converging motive section and an inlet end of the diverging discharge section. The evacuator also includes a fin positioned within the motive section of the body. The fin extends in the direction of the central axis.

Abstract: An agricultural air seeding system, comprising: an agricultural planting implement including at least one section at least one secondary header removably attached to the at least one section, at least one attachment bar attached to the at least one section, and a plurality of application tools removably attached to the at least one attachment bar and fluidly coupled to the at least one secondary header; an agricultural air cart coupled to the agricultural planting implement; and a pneumatic distribution system fluidly coupled to the agricultural planting implement and the agricultural air cart, the pneumatic distribution system including a plurality of conduits capable of transporting agricultural product, at least one of the plurality of conduits including at least one flow obstruction such that a substantially equal air pressure is delivered to the plurality of application tools.

Abstract: The invention relates to an orifice chamber designed to expand a gas, in particular intended for a fluid catalytic cracking unit, said orifice chamber comprising the following elements: a chamber having an axis (X), an inlet duct that opens into the chamber, an outlet duct located on the opposite side from the inlet duct following said axis (X), and a plurality of internal plates positioned crosswise to the axis (X) inside the chamber at a distance from one another along the axis (X), each internal plate being provided with a plurality of through-orifices, characterized in that at least the plurality of internal plates is made of a ceramic material.

Abstract: A core cowl for a turbofan engine may include a plurality of valleys formed in an outer surface of the core cowl. Each valley may include a convex portion upstream of a concave portion, and may be configured to disrupt a shock cell exiting a fan nozzle of the turbofan engine. Associated methods for reducing turbofan engine noise are also described.

Abstract: Fixed systems and method for extinguishing large scale industrial tank fires, with and without fixed roofs, and featuring aerated foam projecting nozzles and including fixed center directed nozzles.

Abstract: For to avoid clogging from abrasive media, a nozzle contains an element for circular vortexing the passing jet of detergents in combination with a defined flexibility of its elements, which—together with a pulsating stream of media—causes vibrations, that constantly lead to peeling off adhering residues.

Abstract: An arrangement to minimize vibrations in a gas turbine exhaust diffuser is provided. The arrangement includes a projection coupled to an inner cylindrical surface or the outer cylindrical surface of a fluid flow path of the gas turbine exhaust diffuser. The projection minimizes pressure oscillations in the gas turbine exhaust diffuser such that an unsteadiness of the fluid flow surrounding the second tangential strut is reduced. A method to minimize pressure oscillations in a gas turbine diffuser is also provided.

Abstract: The present application discloses devices and methods for delivering a therapeutic compound to the olfactory epithelium of an animal or human. The device having one or more channels for imparting a circumferential and axial velocity to the discharged fluid, and an outlet that discharges an aerosol spray having a circumferential and axial velocity as it enters the nasal cavity of a user. The device is designed to displace the air in the upper nasal cavity in order to specifically deposit a therapeutic agent on the olfactory epithelium while minimizing pressure and discomfort experienced by the user.

Abstract: The present disclosure provides a gas turbine combustor including a combustion structure (10) having a combustor liner (14) and a flow sleeve (12). The combustor liner (14) includes inner and outer surfaces (31, 30) and defines a combustion zone (15). The gas turbine combustor further includes a plurality of hollow airfoil-shaped structures (22) affixed to the combustor liner (14) and extending radially outwardly into an airflow space (18) defined radially between the flow sleeve (12) and the combustor liner (14). Each hollow structure (22) includes at least one metering tube (26) providing acoustic communication between the combustion zone (15) and the hollow structure (22). The metering tubes (26) are detachably coupled to the combustor liner (14) for permitting interchanging of the metering tube (26) with at least one additional metering tube having at least one different dimension to effect a change in an acoustic characteristic of the hollow structure (22).

Abstract: A swirl mixer for mixing a reducing agent with exhaust gas in a selective catalytic reduction (SCR) aftertreatment system is described. The swirl mixer may comprise a base permitting a flow of the reducing agent and the exhaust gas therethrough, and three arrays of fins projecting from the base in a direction of flow of the exhaust gas. The three arrays of fins may be arranged in a triangular configuration about a center of the mixer to induce a swirl motion to the reducing agent and the exhaust gas flowing through the mixer. The fins in each of the arrays may be oriented in a common direction that is rotated by about 60° from the common direction of the fins in an adjacent array.

Abstract: A plenum of distributing a flow of air from an air source includes ports extending from a face element of a body. The ports are configured to direct the flow of air out of the plenum, and the ports are arranged on the face element in a first row having first length, a second row having a second length, and a third row having a third length. The first row is positioned proximate to the top element, the third row is positioned proximate to the bottom element, and the second row is positioned between the first row and the third row. In addition, the second length is greater than the first length and the third length, and a shape of the face element is configured to accommodate the first length of the first row, the second length of the second row, and the third length of the third row.

Abstract: The invention relates to a device (1) for controlling the flow of a coolant in a circuit (20) and capable of being exposed to a flow (26) of outside air at the front surface of a vehicle (21), including a means for controlling the flow of coolant, at least one opening of which is placed under the control of a thermostatic detection means, characterized in that the thermostatic detection means includes a thermally conductive surface (9) exposed to said flow (26) of outside air. The invention also relates to the coolant circuit (20) including said control device (1), and to a vehicle (21) provided with such a circuit. The invention can be used for motor vehicles.

Abstract: A flow conditioner for a circular pipe having an axis. The flow conditioner includes a plate having a face to be disposed in the circular pipe with the face of the plate perpendicular to the axis of the pipe. The plate has a central circular passage area through which fluid flows surrounded by two or more concentric arrays of segmented annular passages for fluid flow defined by separating and subdividing ligaments, with at least one subdividing ligament having a width different than a width of a second subdividing ligament. Alternatively, or in addition, there is at least one array of annular passages having a radial width different than a radial width of a second array of annular passages and at least one subdividing ligament having a width different than a width of a second subdividing ligament. A method of producing an optimized geometry of flow conditioner for a circular pipe having an axis.

Abstract: A material distribution system includes: a chassis; a material tank carried by the chassis and configured to hold a material; and a header configured to receive and distribute material from the material tank entrained in an air flow. The header includes: a header body having a pair of sidewalls, an inlet configured to receive entrained material from the material tank and a plurality of outlets, the sidewalls defining a width therebetween that increases from the inlet toward the plurality of outlets; a valve associated with an outlet that is configured to switch between a distributing position and a purging position, the valve blocking its outlet in the purging position; and a plenum having a volume of air that is selectively in fluid communication with the plurality of outlets to provide a purging air flow to the outlet with the associated valve when the valve is in the purging position.

Abstract: A diffuser basket includes a screen portion and a flow modifier positioned within the screen portion. The flow modifier is configured to change the direction of flow of a fluid introduced into the diffuser basket. The flow modifier can include a plurality of flat plates coupled to the screen portion and positioned at spaced apart intervals along a longitudinal axis of the diffuser basket. The flow modifier can include a plurality of truncated conical plates positioned at spaced apart intervals along a longitudinal axis of the diffuser basket, the plurality of truncated conical plates coupled to the screen portion. The plurality of flat or truncated conical plates each can include an opening. The plurality of flat truncated conical plates each has a cone angle that forms an oblique angle with respect to the longitudinal axis. These cone angles can be the same or they can be different.

Abstract: An arrangement to control vibrations in a gas turbine exhaust diffuser is provided. The arrangement includes a protrusion coupled to a turbine exhaust cylinder strut for controlling shock induced oscillations in a gas turbine diffuser. The controlled shock induced oscillations minimize pressure fluctuations in the gas turbine exhaust diffuser such that an unsteadiness of the fluid flow surrounding the turbine exhaust cylinder strut is reduced. A method to fluid flow induced vibrations in a gas turbine diffuser is also provided.

Abstract: Methods and a device for mixing airflows in an environmental control system are provided. The device includes a duct configured to receive a first airflow and a second airflow, and a plurality of guide vanes disposed within said duct. The guide vanes are configured to induce rotation of the first and second airflows flowing through the duct.

Abstract: A method for producing a damper for an air line of an internal combustion engine includes the following steps: providing a temperature-controlled inner part having passages; producing a tubular preform of an outer jacket from a thermoplastic melt; and attaching the temperature-controlled inner part to a blowing mandrel of a blow mold, which is open. The blowing mandrel has outlet openings and the passages are positioned over the outlet openings. The method further includes bringing the temperature-controlled preform over the inner part and closing the blow mold such that the preform is blown against the walls of the blow mold, whereby an outer jacket is obtained. Simultaneously, local connections between the inner part and the outer jacket are obtained by pressing the preform and the inner part against each other in some regions. Finally, the blow mold is opened and the damper is removed.

Abstract: A system for generating swirl includes a pipe and at least two orifice plates located within a section of the pipe and defining a swirl generation area. Each orifice plate has an off-set orifice or hole and is configured to have a position that is adjustable within the swirl generation area. Each orifice plate may be oriented at an angle variable to each other to generate a variable degree of swirl as fluid flow exits the swirl generation area.

Abstract: A flow-straightener apparatus and associated systems for converting a rotating airflow into a substantially longitudinally directed airflow is presented. A first annular frame is provided and a second annular frame arranged concentrically within the first annular frame. A plurality of flow-straightener vanes are also provided, each having a first end coupled to an interior surface of the first annular frame and a second end coupled to an exterior surface of the second annular frame. The plurality of flow-straightener vanes each also have a leading edge and a trailing edge and each vane has a curved segment.

Abstract: A flow control baffle apparatus for a vehicle heater is provided. The flow control baffle apparatus implements a flow control function of a fluid passing through the interior of a heater and improves the heat transfer performance of the heater. The flow control baffle apparatus for a vehicle heater includes a plurality of heater pipes that are disposed within the interior of a heater and a baffle pivotably disposed at both sides of the heater pipe to adjust the flow of a fluid. Wherein the baffle adjusts the flow rate of a fluid passing through the heater.

Abstract: Low drag low noise devices are described herein that use passive jet flow control to reduce the drag and noise created by motor vehicles (e.g., motor vehicle side view mirrors and their main bodies) while the motor vehicles travel through a fluid. The low drag low noise devices described herein comprise a lengthwise axis, an outer body, and an inner body. The outer body and the inner body cooperatively define a channel through which fluid can pass during use.

Abstract: A pipe (11), carrying exhaust gas, of an exhaust system (1) of an internal combustion engine (9), with a tubular body (15) carrying exhaust gas, and with at least one attachment part (12) separate with respect to the tubular body (15), which is added laterally to the tubular body (15) so that externally on the tubular body (15) a cavity (13) is arranged delimited at least partially by the attachment part (12), which extends in the circumferential direction (14) of the tubular body (15) over less than 360°.

Abstract: The present application relates generally to a demonstration kit for various nozzles. The demonstration kit may include a spray assembly and a control assembly. The spray assembly may include a case having a base and a cover rotatably coupled to the base, a plurality of back wall panels configured to be secured to a sidewall of the base, a boom connected to an interior surface of the case, and one or more nozzles connected to the boom and repositionable along a length of the boom. The control assembly includes at least one pump that when in an operating orientation is fluidly connected to the one or more nozzles and a portable power supply in electrical communication with the at least one pump.

Abstract: An aggregated channel switching unit is disposed between a heat source unit and a plurality of utilization units to switch flow of refrigerant in the refrigerant circuit. The aggregated channel switching unit including a plurality of first refrigerant pipes having switch valves, a plurality of second refrigerant pipes, and a casing accommodating the first and second pipes. The first and second pipes are aggregated as an assembly. The first pipes are connected to a high-low pressure gas communicating pipe and a suction gas communicating pipe extending from the heat source unit. The second refrigerant pipes are connected to a liquid communicating pipe extending from the heat source unit and a liquid pipe extending to the utilization units. Adjacent pairs of the first and second pipes extend approximately in parallel to each other at predetermined intervals in the assembly. The first and second pipes are alternately disposed in the assembly.

Abstract: Fixed systems and method for extinguishing large scale industrial tank fires, with and without fixed roofs, and featuring aerated foam projecting nozzles and including fixed center directed nozzles. The invention includes two connected nozzles, which project aerated foam of between in substantially focused streams and in roughly opposing directions. The two nozzles have a stream shaper in a tip portion of the nozzle with fins which terminate substantially flush with a nozzle tip solid bore discharge orifice. The two nozzles preferably are attached proximally downstream of and in fluid communication with at least one ambient air aeration chamber structure in combination with the two nozzles to produce aerated foam. A third nozzle of the fixed system is structured to discharge in a direction of within 30° of a perpendicular to the discharge axis defined by the two nozzles discharging in the roughly opposing directions.

Abstract: An integrated single-piece exhaust system (SPEX) with modular construction that facilitates design changes for enhanced aerodynamics, structural integrity or serviceability. The SPEX defines splined or curved exhaust path surfaces, such as a series of cylindrical and frusto-conical sections that mimic curves. The constructed sections may include: (i) a tail cone assembly fabricated from conical sections that taper downstream to a reduced diameter; or (ii) an area-ruled cross section axially aligned with one or more rows of turbine struts; or both features. Modular inner and outer diameter inlet lips enhance transitional flow between the last row blades and the SPEX, as well as enhance structural integrity. Modular strut collars have large radius profiles between the SPEX annular inner diameter and outer diameter flow surfaces, for enhanced airflow and constant thickness walls for uniform heat transfer and thermal expansion. Scalloped mounting flanges enhance structural integrity and longevity.

Abstract: A flow conditioner includes a single disk comprising an array of holes; a first set of integral vanes at least partially following a contour or pattern of an outer ring the holes; and a second set of integral vanes at least partially following a contour or pattern of an inner ring the holes. The second set of integral vanes is recessed from the first set of integral vanes in a stepped configuration.

Abstract: A device for influencing the flow in the area of a pipe manifold plate of a tube bundle heat exchanger with an outer channel encased by an outer sheath for a heat carrier medium, with a number of inner tubes extending axially parallel to the outer sheath through the outer channel, together forming an inner channel, each supported on the end side in the pipe manifold plate, with an inlet or outlet common for all inner tubes designed in a exchanger flange and a common outlet or respectively inlet designed in a connection piece for a product with at least one displacement body. A guide ring forms radially inside with its inner contour the required and proven flow environment for the displacement body.

Abstract: A flow conditioner for a circular pipe having an axis. The flow conditioner includes a plate having a face to be disposed in the circular pipe with the face of the plate perpendicular to the axis of the pipe. The plate has a central circular passage area through which fluid flows surrounded by two or more concentric arrays of segmented annular passages for fluid flow defined by separating and subdividing ligaments, with at least one subdividing ligament having a width different than a width of a second subdividing ligament. Alternatively, or in addition, there is at least one array of annular passages having a radial width different than a radial width of a second array of annular passages and at least one subdividing ligament having a width different than a width of a second subdividing ligament. A method of producing an optimized geometry of flow conditioner for a circular pipe having an axis.

Abstract: A duct intersection comprising a first duct portion and a second duct portion extending laterally from a side of the first duct portion. At least one flow modifier is mounted inside one of the first and second duct portions. The flow modifier is a contoured duct liner and/or the flow modifier includes at least one turning vane. The duct intersection may also include a transition portion extending between the first and second duct portions, wherein the transition portion has a length extending along a side of the first duct portion and a depth extending away from the side of the first duct portion, wherein the length is greater than a diameter of the second duct portion.

Abstract: A rectifier mounted at a bottom of a reactor includes a central layer (1), at least one interlayer (2) and an external layer (3), which are made of bird nest honeycomb ceramic, wherein porosities of the central layer, the interlayer and the external layer increase in turn. The central layer, the interlayer and the external layer are respectively provided in a central-layer cone shaped body, an interlayer cone shaped body and an external-layer cone shaped body which are installed concentrically, so as to form meshed honeycomb pores with different porosities at the bottom of the rectifier. The rectifier is made of bird nest ceramic with high density honeycomb pores, and a minimum density thereof is over 200 meshes.

Abstract: A self-calibrating fluid measuring device for calculating density and velocity of a fluid. The device can have a hollow body with a chamber for receiving and emitting fluid, a ledge, a conical section mount positioned in the hollow body and secured to the ledge, a temperature sensor extending into a temperature port and an upstream static pressure sensor mounted in a static upstream pressure port, a downstream cone pressure drop sensor mounted in a downstream pressure port, and a ram velocity sensor mounted in a ram velocity port, which can all extend into the chamber. A detachable and re-attachable conical area ratio changer can be connected to the conical section mount having a central bore and a hollow fastener configured to align and center the detachable and re-attachable conical area ratio changer to the conical section mount during measurement.

Abstract: The appliance safety device provides a spray of a liquid, typically a water, both above and below an appliance deemed capable of catching fire. The device also retaliates against either the appliance or the liquid release that can harm a surrounding environment. The device automatically senses an excessive heat and triggers the spray over and under the appliance, with a pan positioned below the appliance to capture the spray. Water buildup within the pan is automatically sensed and a pump triggered to evacuate the pan through a drain line into a drain.

Abstract: A bidirectional downhole fluid flow control system is operable to control the inflow of formation fluids and the outflow of injection fluids. The system includes at least one injection flow control component and at least one production flow control component in parallel with the at least one injection flow control component. The at least one injection flow control component and the at least one production flow control component each have direction dependent flow resistance, such that injection fluid flow experiences a greater flow resistance through the at least one production flow control component than through the at least one injection flow control component and such that production fluid flow experiences a greater flow resistance through the at least one injection flow control component than through the at least one production flow control component.

Abstract: The flow path structure includes a flow path introducing fluid from an inlet to an outlet, and a flow velocity control structure provided in a portion between the inlet and the outlet in the flow path to reduce difference in flow velocity that the fluid flowing into the flow path has in a direction intersecting with a flow direction of the fluid. The flow velocity control structure includes, in the direction intersecting with the flow direction, plural flow velocity control members provided alternately with spaces through which the fluid passes. The flow velocity control members have different sizes from each other, the sizes increasing as the flow velocity of the fluid at areas, in the direction intersecting with the flow direction, where the respective flow velocity control members are provided increases.

Abstract: Bundled carbon nanotubes are disentangled and dispersed using the principles of extreme pressure reduction of fluids carrying the bundled nanotubes. They are added to a high pressure fluid upstream of a chamber operated at much lower pressure. These high-low pressure ratios are preferably at least 100:1. As the high pressure fluid enters the lower pressure chamber it violently expands causing separation and disentanglement of the bundled carbon fibers. To further assist in this disentanglement a nozzle may be used at the inlet to the lower pressure chamber to direct the high pressure fluid against a hardened anvil in the chamber. This impact further aids disentanglement. Coating the nanotubes with a dispersant also improves disentanglement.

Abstract: An improved low-pressure, water-heating solar panel provides easier and safer initial installation because it is more resistant to damage by workmen during that installation. Further, after installation, the solar panel is more resistant to damage by high winds because it has a low profile and does not present a gap or space into which high winds can intrude to lift, cause flapping of, and damage to the solar panel. Also, during freezing weather the improved solar panel is not damaged by freezing of retained water due to its novel internal construction which allows substantially all water to completely drain from the solar panel and prevents any puddling of retained water. Methods of manufacturing the improved solar panel are disclosed.

Abstract: A system for conveying fluid includes a conduit segment and a pump disposed downstream of and fluidicly coupled to the conduit segment. The conduit segment has an interior volume for conveying the fluid in a predetermined direction of flow and a plurality of elongate vanes disposed within the interior volume.

Abstract: Examples of a jet control device are described. The jet control device can comprise a jet deflecting member that is configured to intercept and/or collide with a high speed jet emerging from a jet formation location. The interaction of the jet deflecting member and the jet can cause the high speed jet to be dispersed into a plurality of jets with a number of flow directions which may be sideways to an initial direction of the high speed jet. In one embodiment the deflecting member can include a liquid guide formed by injecting a fluid out of an outlet nozzle so that the liquid guide extends longitudinally away from the outlet nozzle. In another embodiment the deflecting member can include an array of solid pellets injected through an outlet in a direction of the emerging high speed jet and configured to collide with the emerging jet thereby deflecting its initial direction.

Abstract: A vent duct having an inner fluid flow passage includes a bent portion formed to a duct body portion at which the fluid flow passage is bent, and a protruded portion formed on a downstream side of the bent portion so as to protrude from an inner peripheral surface portion toward an axial center of the fluid flow passage, wherein the protruded portion includes an upstream side end portion formed to be gently continuous to the inner peripheral surface portion of a downstream side portion of the bent portion, a body portion extending from the upstream side end portion toward the downstream side portion along the fluid flow passage, and a downstream side end portion along the fluid flow passage to be continuous to the body, the downstream side end portion of the protruded portion being formed to be perpendicular to the inner peripheral surface portion.

Abstract: According to one aspect of the invention, a riser includes a cylindrical housing defined by a sidewall having an interior surface and an exterior surface. A baffle is defined by a first segment and a second segment, wherein the baffle is designed to be positioned on the interior surface of the riser and wherein the first segment and second segment are releasably interlockable.

Abstract: A pressure sensor system may sense the pressure of a gas or liquid. The system may include a housing that has an entry port for the gas or liquid; a pressure sensor within the housing; and a baffle positioned between the entry port and the pressure sensor. The baffle may have one or more inlets oriented to receive gas or liquid that enters the entry port; one or more outlets oriented to deliver the received gas or liquid to the pressure sensor; and one or more sealed flow channels that prevent the gas or liquid from escaping from the baffle, other than through the one or more outlets. At least one of the outlets may be located within no more than one millimeter of a location on the pressure sensor. The pressure sensor and baffle may be made at the same time during a process of depositing, pattering, etching, wafer bonding, and/or wafer thinning a series of layers using microelectromechanical systems (MEMS) technology.

Abstract: An apparatus for controlling a flow of gas comprises a spiral path guiding member. The spiral path guiding member comprises at least two groups of guiding plates. Each guiding plate of each group is disposed in an axial direction to form a longitudinal axis. Each group is spaced apart in the longitudinal direction. A surface of each guiding plate is substantially parallel to the longitudinal axis. At least one guiding plate of each group has a guiding plate opening. Guiding plate openings of the guiding plates may facilitate gas to flow in a spiral flow path.

Abstract: An assembly for mixing liquid within a gas flow includes a hollow conduit that is configured for containing a flow of gas and liquid droplets. The assembly also includes multiple spaced blades and an impingement element. Each of the blades is operatively connected to and extends from the impingement element and is connected to an inner wall of the conduit. The impingement element is upstream of the blades in the flow of gas. The impingement element and the blades are configured to create a preferred distribution of the liquid droplets within the gas flow downstream of the blades within the conduit.

Abstract: A liner assembly for a substrate processing system includes a first liner and a second liner. The first liner includes an annular body and an outer peripheral surface including a first fluid guide. The first fluid guide is curved about a circumferential line extending around the first liner. The second liner includes an annular body, an outer rim, an inner rim, a second fluid guide extending between the outer rim and the inner rim, and a plurality of partition walls extending outwardly from the second fluid guide. The second fluid guide is curved about the circumferential line when the first and second liners are positioned within the processing system.

Abstract: A water-saving antiblocking anti-splash waterfall water curtain head core comprises a housing having an upper portion internally enlarged and a flow leading mouth set inside the housing; a block is set under the flow leading mouth, and there are spaces between the upper surface of the block and the exit of the flow leading mouth; the upper surface of the block is fixedly connected with a support rod going through the flow leading mouth; a flow leading bracket with through holes is fixedly connected to the internally enlarged upper portion and to a top of the support rod; the flow leading mouth is such sized to anti-block. During operation, the surface of the block equally blocks water flow and accordingly forms hollow film-like water curtain.

Abstract: An air duct includes a main body, and an adjusting assembly. The main body includes a top plate and two lateral plates extending from opposite sides of the top plate. The adjusting assembly includes two first limiting plates, a second limiting plate, and a third plate. The second and third limiting plates are slidably attached to each other, and are respectively pivotably attached to the first limiting plates. Each first limiting plate is adjustably attached to the lateral plates.

Abstract: A dynamic fluid flow control structure is provided that allows precise control over fluid flow using a series of two or more orifices, at least one of which may be reconfigured to change its flow characteristics. A flood control system and a flood control process are provided that emulate a preset discharge profile over time. Some versions of the structure, process, and system can be used to provide controlled storm discharge patterns in a developed area that emulate the natural pre-development discharge patterns.

Abstract: The photoreactor comprises a tube bundle (10) made up of numerous capillary tubes (11) through which a reaction medium flows. The tubes (11) are transparent. Solar radiation or artificial radiation acts upon the reaction medium for effecting a photochemical or photobiological treatment. The inlet chamber (12) connected with the tube bundle (10) comprises a flow distributor (16) which distributes the reaction medium from the fluid inlet (15) to the tubes (11). The flow distributor (16) allows for a smaller volume of the inlet chamber (12). The reactor volume, which is not irradiated, is thus reduced, and the efficiency of the rector is enhanced.