Abstract: Various kinds of oscillatory instabilities are seen in practical systems. We devise of way of combating these oscillatory instabilities in a thermoacoustic system. Confined combustion environments are prone to large amplitude pressure oscillations known as thermoacoustic instabilities. Although several techniques have been employed to control or mitigate such instabilities, optimization of these methods is achieved at the cost of performing multiple trial and error experiments/simulations. This invention develops a methodology to quantify the spatio-temporal dynamics using synchronization, recurrence, and fractal measures and find the coherent region in such turbulent flow field. Such an analysis provides us with a novel way to detect critical regions responsible for thermoacoustic instability, and other oscillatory instabilities in general, in the flow field and implement an optimized control strategy at these regions.

Abstract: A cooktop grate assembly includes a heat shield having an outer rim and a central plateau region offset from the outer rim by a connecting wall. The central plateau region defines an opening for receiving a burner assembly. A grate is positioned over the heat shield. The grate includes supports that extend over the central plateau region. A gasket is disposed adjacent to the heat shield. The gasket engages at least one of a base of the grate and feet of the supports to retain the grate in position relative to the heat shield.

Abstract: Cooktop appliances are provided. A cooktop appliance can include a manifold having a gas input; a first burner in fluid communication with the manifold through a first burner supply line having a first valve; and a second burner in fluid communication with the manifold through a second burner supply line having a second valve, the second burner arranged coaxially with respect to the first burner, wherein the second burner supply line comprises a primary line, a secondary line, and a sum line, the sum line providing a combined flow of gas from the primary line and the secondary line to the second burner, wherein the secondary line of the second burner comprises a third valve.

Abstract: A cooking appliance and method utilize a rotary burner control with a rotary control actuator, a position sensor, and an electronic burner control user interface to control an electromechanical valve unit that regulates gas flow to a gas burner.

Abstract: A cooking appliance has a multi-section cooking surface that is expandable to provide a larger depth cooking surface by slideably extending a moveable front burner section of the cooking surface. The cooking appliance includes a base section extending below the cooking surface, the base section providing structure and physical support for the cooking surface. The cooking appliance includes a multi-sectioned cooking surface having a stationary rear burner section and a movable front burner section. The stationary rear burner section includes at least one rear/back burner, and the moveable front burner section includes at least one front burner. The moveable front burner section translates/slides forward away from the stationary rear burner section to provide additional/larger separation spacing between the at least one rear burner and the at least one front burner. A block insert panel is inserted into the space created between the rear burner section and the extended front burner section.

Abstract: An airfoil blade assembly includes an upper airfoil shell, and a lower airfoil shell and a pair of upper legs protruding from the upper airfoil shell and extending towards the lower airfoil shell. A pair of lower legs protrudes from the lower airfoil shell and extending towards the upper airfoil shell and are formed by bending material of the lower airfoil shell back upon itself. An upper strengthening rib formed is in the upper airfoil shell, and a lower strengthening rib is formed in the lower airfoil shell. The pair of upper legs and the pair of lower legs are abutting when the upper airfoil shell and the lower airfoil shell are selectively fixed to one another.

Abstract: A heating unit comprising an electrically conductive substrate. A solid fuel layer comprising a metal reducing agent, a metal containing oxidizing agent and a binder is coated on a surface of the substrate, the solid fuel layer having a solid fuel surface spaced from the substrate. A first electrode coupled to the substrate. A second electrode coupled to the solid fuel surface. A power supply is configured to be selectively coupled to the first and second electrodes to provide a voltage between the metallic substrate and the solid fuel surface. The voltage acts to propagate an exothermic metal oxidation-reduction reaction without the use of an igniter.

Abstract: A combustion head for a burner is provided with an outer sleeve, which houses, on the inside, a first feeding device to feed a gaseous fuel into an oxidizing air flow fed along the outer sleeve by means of a pneumatic ventilation device, at least one swirl device, which is configured to cause a primary flow F1 of gaseous fuel and oxidizing air flowing out of the outer sleeve to make a helical movement, and at least one feeding channel with an annular shape, which is obtained between the outer sleeve and the swirl device in order to feed a secondary flow F2 of oxidizing air around the primary flow F1; a second feeding device being mounted on the outside of the outer sleeve and being connected to a gaseous fuel source.

Abstract: A method of determining a reflector parameter of a concentrating solar collector's reflector surface. An image is captured of the reflected receiver tube in the reflector surface, with an image capturing device, e.g. a camera, and processed to put together image data related to the reflected receiver tube. Further, the method comprises determining a location of the image capturing device at a capturing time of the captured image, and determining a position on the reflector surface based on the determined location of the image capturing device and the image data. The method comprises also calculating the reflector parameter at the determined position based on the image data. By numeric calculation of reflector parameters, such as slope, defects, e.g. caused by impacts or material imperfections, may be identified at an early stage before installing the solar collectors, which may reduce service needs.

Abstract: A support bypass vent having: a beam pass vent having: central body portion with two opposite ends and a hollow center; a terminal end portion associated with each opposite end of the central body portion; a plurality of screw plates associated with the central body portion; at least one adapter port nested within each terminal end portion; and a ventilation line adapter configured to engage with each terminal end portion by engaging with a corresponding adapter port; wherein each ventilation line adapter is further configured to engage with a corresponding ventilation line such that air is configured to travel through the support bypass vent. By utilizing a support bypass vent with a central body portion having a lesser thickness as part of a ventilation system, the support bypass vent may provide a ventilation pathway around a support structure without significantly increasing the resultant wall thickness covering the support structure.

Abstract: The present disclosure relates to a cooking apparatus including a knob assembly used to operate the cooking apparatus. The cooking apparatus includes a main body comprising a control panel, a valve disposed inside the main body and comprising a valve shaft configured to be movable, and a knob assembly comprising a knob cover rotatably disposed on the control panel, and a knob body configured to be pushed separately from the knob cover to push the valve shaft so that the valve shaft is prevented from being pushed by the knob cover.

Abstract: A filter, a manufacturing method for a filter, and an air conditioner are provided. The filter includes a casing, a transition tube, and a filter screen assembly. The filter screen assembly is provided in the casing, fitted with and connected to an inner wall of the casing, the casing is an integrally formed piece, and two axial ends of the casing have neck sections, and two neck sections are both fixedly connected to the transition tube.

Abstract: A multi-fueled impulse initiator that includes a fuel source equipped with a control valve, an air source equipped with a control valve, a removable air flow insert having opposing inlet and outlet faces, an air expansion chamber fluidly connected to both the air source and the inlet face of the removable air flow insert, and an igniter assembly having a sparking tip. The removable air flow insert includes channels traversing from the inlet face to the outlet face of the air flow insert.

Abstract: Disclosed is an outdoor portable gas stove, which includes a stove cover, a burner, a gas pipeline, an ignition device and a flame-out protection device. The burner is arranged in the stove cover, an annular gas passage is formed in the burner, a gas outlet and combustion hole is defined on an upper end face of the burner, and the gas outlet and combustion hole is communicated with the annular gas passage. The ignition device is arranged above the gas outlet and combustion hole and is configured for igniting gas. The gas pipeline is communicated with the annular gas passage, and a control valve is arranged on the gas pipeline. The flame-out protection device is arranged above the gas outlet and combustion hole and connected with the gas pipeline. The technical proposal of the present application can realize an overall control of gas supply.

Abstract: An ultra wideband (UWB) combustion sensor detects presence or absence of combustion corresponding to an effect on a transmitted, time-gated pulse and detection by a presence or absence of charged particles associated with combustion. A combustion system includes a UWB combustion sensor. A method for operating a combustion system includes operation of a UWB combustion sensor.

Abstract: A method of monitoring a flame during gas combustion in a combustion chamber (10). A heating unit (1) has an evaluation unit, an extraction line (11) and a sensor (12). The sensor (12) is arranged in the extraction line (11) to detect thermal substance properties of the gas. Thus, it is determined if it is ambient air (B), a non-combusted fuel-air mixture (C) or particularly the hydrogen-air mixture, or a waste gas (A) generated during combustion. The sensor (12) transmits a recorded measured value to the evaluation unit. The evaluation unit uses the measured value to determine whether ambient air (B), the non-combusted fuel-air mixture (C), or waste gas (A) is flowing through the extraction line (11) and thereby determines whether the flame is burning or extinguished.

Abstract: A burner assembly for a cooktop comprises a spreader comprising (i) a central portion through which an axis extends, the central portion with a bottom surface, (ii) a plurality of apertures through the spreader, the plurality of apertures disposed further away from the axis than the central portion, and (iii) a ridge projecting from the bottom surface, the ridge disposed further from the axis than the central portion but closer to the axis than the plurality of apertures.

Abstract: A candle assembly includes a candle holder configured to hold a candle block. The candle holder has an opening, a wall and base. The wall is attached around the periphery of the base. The opening is positioned opposite the base. The base includes an aperture extending through the thickness of the base. An inner liner is placed in the candle holder and configured to fit tightly against the wall and to provide a watertight container for the candle block. The inner liner has an exposed portion across the aperture to define a button. A rim is attached to the wall opposite the base and configured to extend into the candle holder at least the thickness of the inner liner and to secure the inner liner within the candle holder.

Abstract: A cooking appliance includes a secondary venting arrangement within an oven cavity to supplement a primary venting arrangement with localized venting of combustion products adjacent a flame detector that detects a flame emitted by a gas burner disposed under the oven cavity. Doing so may assist with stabilizing the flame generated by the gas burner prior to establishment of steady state flow pattern within the oven cavity.

Abstract: Systems and methods include a computer-implemented method for real-time flare network monitoring. Real-time flaring volume data is received from relief devices connected to a flare network. The real-time flaring volume data is analyzed in conjunction with heat and material balance information of the relief devices. A comprehensive molar balance is performed based on the analyzing, the balancing including losses/feed percentages for each component of the flare network including the relief devices throughout the flare network. Flaring data for the components is aggregated for each flare header. Real-time flare network monitoring information, including instantaneous component-wise flaring for each flare header in the flare network is provided for display to a user in a user interface.