70 results about "Oscillating flow" patented technology

A system for control of a fluid flow. The system includes an array of fluidic oscillators. Each fluidic oscillator carries an oscillating flow of the fluid and includes a throat, an input port connected to the throat, two control ports connected to the throat and two output ports extending from the throat. A feedback line is connected to each of the two output ports and each of the two control ports. The system further includes a plenum connected to the input ports of the fluidic oscillators to supply the fluid to the fluidic oscillators and a feedback chamber disposed along each feedback line of each fluidic oscillator to provide a feedback path for the control fluid to cause oscillatory fluid motion between the first output port and the second output port, the frequency of which may be modulated by adjusting the volume of the feedback chamber.

A novel method and system of separating carbon dioxide from flue gas is introduced. Instead of relying on large temperature or pressure changes to remove carbon dioxide from a solvent used to absorb it from flue gas, the ion pump method, as disclosed herein, dramatically increases the concentration of dissolved carbonate ion in solution. This increases the overlying vapor pressure of carbon dioxide gas, permitting carbon dioxide to be removed from the downstream side of the ion pump as a pure gas. The ion pumping may be obtained from reverse osmosis, electrodialysis, thermal desalination methods, or an ion pump system having an oscillating flow in synchronization with an induced electric field.

The invention discloses a thermo-acoustic engine driven by a multi-temperature-level heat source, comprising a traveling wave circuit of the thermo-acoustic engine and a resonance tube of the thermo-acoustic engine. The traveling wave circuit of the thermo-acoustic engine consists of a direct current inhabitation component, a main cooler, a heat regenerator, a heat buffer tube, a secondary cooler, a deflector, a feedback loop and an acoustic capacitance, characterized in that the heat regenerator is provided with a heating device on the outside, the heating device is a multi-temperature-level heating device with high temperature level and low temperature level being arranged from the high temperature end to the lower temperature end successively. The invention makes full use of the thermoacoustic effect and the regenerative function of the thermo-acoustic engine in oscillating flow, the multi-temperature-level heat source is used for heating the different positions in the axial direction of the engine, thus the temperature level of an available heat source is lowered, the heat-power conversion efficiency of the thermo-acoustic engine is improved, and the structures of the heat regenerator and the heating device become more compact.

Micro-cooling technology for thermal control in the fabrication and operation of micro- and nano-scale such as high speed, high density micro scale electronic devices, micro sensors and micro machines Micro/mini heat exchangers and heat pipes have at least one channel through which the streaming flow is passed therethrough. The oscillating flow can be generated by diaphragms, vibrators, electrokinenatic force and thermal acoustic force.

The invention discloses a pulse tube cooler system using automobile vibration energy, which comprises an air cylinder, a first pipeline, a second pipeline, a first pulse tube cooler, a second pulse tube cooler and a phase adjusting structure, wherein the air cylinder, the first pulse tube cooler, the phase adjusting structure, the second pipeline and the second pulse tube cooler are sequentially connected; the second pulse tube cooler is connected with the air cylinder through the first pipeline; a piston is arranged in the air cylinder and is provided with a spring; a groove is arranged on the periphery of the piston; and the first pulse tube cooler and the second pulse tube cooler respectively comprise a heat exchanger of a heat regenerator, a heat regenerator, a pulse tube cold-end heat exchanger, a pulse tube and a pulse tube heat-end heat exchanger. The pulse tube cooler system has the characteristics that an inertia force generated by vibration of the automobile does work to generate work medium oscillating flow of the pulse tube coolers, thereby, cold energy is generated; and in addition, the pulse tube cooler system has a compact structure, small size and no power supply.

The invention discloses a drying and adjusting process for viscose fibers. The process comprises the following steps of: 1) feeding the viscose fibers into a superheated vapor drier in a front area by a feeder; feeding a drying medium heated by a vapor coil into a drying chamber of the superheated vapor drier in the front area; drying the viscose fibers; evaporating water of the viscose fibers during drying; increasing pressure; and discharging out excessive water vapor to an oscillating-flow heat pipe heat exchanger through the linkage of a pressure controller and an induced draft fan; 2) under an effect of a chain conveying device, conveying the viscose fibers to a superheated vapor drier in a middle area, wherein the drying process in the middle area is similar to that in the front area; meanwhile, discharging out the excessive water vapor to the oscillating-flow heat pipe heat exchanger; and 3) heating the recycled water vapor in the oscillating-flow heat pipe heat exchanger into fresh air; feeding the fresh air into a hot air drier in a back area, so as to finish deep drying and adjusting of the viscose fibers; obtaining the dried viscose fibers; and emptying tail gas. The invention further discloses a device of the process. The viscose fibers with high qualities can be obtained; and energy consumption is reduced by 35-40%.

A counter-stream-mode oscillating-flow heat transport apparatus accommodates a change in volume of a liquid while preventing reduction in heat transport capability. A flow path and a buffer tank are placed in communication with each other via a throttle such as a capillary tube. This prevents a channel connecting the flow path and the buffer tank from having an excessively reduced channel resistance (flow path resistance). This prevents the fluid in a heat transport device assembly (the flow path) from only going back and forth between the heat transport device assembly and the buffer tank without experiencing liquid (pressure) oscillations in the heat transport device assembly. Accordingly, the liquid in the heat transport device assembly is prevented from being reduced in amplitude of oscillation, thereby preventing degradation in heat transport capability of the counter-stream-mode oscillating-flow heat transport apparatus.

The flow meter is a device having a laser Doppler anemometer (LDA) which measures the instantaneous center line velocity of fluid flow in a pipe and processes the instantaneous velocity so obtained to compute the volumetric flow rate, mass rate, and other flow characteristics as instantaneous quantities and/or integrated over a time interval using an electronic processing method which provides an exact solution to the Navier-Stokes equations for any periodically oscillating flow. The flow meter is particularly adapted for measuring the flow characteristics of high pressure automotive fuel injection systems. Three embodiments of the flow meter are described, including a stationary stand for off-line bench testing flow rate in a fuel injection system, a portable flow meter for inline testing in a vehicle's fuel line, and an on-board flow meter sensor connected to an engine control module.

The invention belongs to the technical field of high heat flux density electronic elements and relates to a high-power LED (light emitting diode) heat radiator, wherein an outer wall of a cylindrical heat conduction cavity is fixedly connected with 4-16 ring-shaped fins; one divergent oscillating-flow heat pipe is coaxially and fixedly connected to each fin; a heating section of the divergent oscillating-flow heat pipe is arranged in a cavity body of the heat conduction cavity after passing through the outer wall of the heat conduction cavity; the divergent oscillating-flow heat pipe is fixedly and hermetically connected with the outer wall of the heat conduction cavity; a round LED base is coaxially and fixedly connected to the lower end face of the heat conduction cavity; an LED chip is fixedly connected to the centre of the LED base; a sealed container is used as the heat conduction cavity, and heat conduction media are filled in the heat conduction cavity. With the adoption of the united running of the divergent oscillating-flow heat pipe and the heat conduction cavity filled with low boiling-point heat conduction medium or heat conduction oil, heat generated by the LED is released in time, so that the heat radiator is an efficient, portable and beautiful high-power LED heat radiator which is suitable for the radiation of high heat flux density electronic elements and particularly suitable for the heat radiation of high-power LEDs.

An aerodynamic flow control system includes a plurality of actuator units integrated at predetermined locations along a span of an aerodynamic surface of a vehicle to provide aerodynamic active air flow control, wherein each of the plurality of actuator units includes an electrically powered compressor to compress air; a transitional component to receive the compressed air from the compressor and provide two streams of the compressed air; and a fluidic oscillator having two inlet ports that receive the two streams of the compressed air, and an exit port that discharges a single oscillating flow of air at a predetermined velocity.

The invention relates to a simulation device and test method for oscillating heat transfer performance of a cold oil duct in a piston.The simulation device for oscillating heat transfer performance ofthe cold oil duct in the piston comprises a main body oscillating device, a rectangular cavity heating device, a coolant supply collecting device, a high-speed photographic device, bolts, a mountingplatform, a control box, and a computer;the mounting platform is mounted on the upper side of the main body oscillating device and connected with the main body oscillating device,the rectangular cavity heating device is fixed to one end of the upper surface of the mounting platform through the bolts, the coolant supply collecting device is fixedly mounted on the other end of the upper surface of the mounting platform,the control box is connected with the computer, the main body oscillating device, the rectangular cavity heating device, the coolant supply collecting device, and the high-speed photographic device through wires for data transmission. According to the simulation device and test method for oscillating heat transfer performance of the cold oil duct in the piston, the oscillatingworking condition under the actual working condition of the piston is dynamically simulated, the oscillating flow characteristic of a coolantcan be intuitively observed by using the high-speed camera, at the same time the wall surface heat transfer coefficient can be calculated, and the oscillating heat transfer performance of the cold oil duct in the piston is further analyzed.

The invention discloses a method for preparing iminodiacetic acid through continuous hydrolysis. The method comprises the following steps: mixing reaction material imidogen diacetonitrile and water in proportion; providing a perfectly mixed reactor, conveying the reaction material into the perfectly mixed reactor, so as to perform hydrolysis reaction; providing a tubular reactor, and conveying reaction liquid in the perfectly mixed reactor into the tubular reactor under the action of liquid level difference pressure; providing a product storage tank, ensuring that the reaction material performs periodic self-oscillating flowing between the tubular reactor and a product storage tank, discharging a product into the product storage tank after reaction. The method for preparing iminodiacetic acid through continuous hydrolysis improves the reaction yield. The invention further provides a self-oscillating reactor.

An apparatus or method for generating a microfoam, the apparatus comprising a channel having an inlet and an outlet, a source of foamable liquid and pressurised gas arranged to feed into the inlet, wherein the channel is comprised of a spatially oscillating flow channel to provide an oscillating flow direction, the spatially oscillating flow channel oscillating about a bulk flow direction, the spatially oscillating flow channel providing a sequence of planar cross-sections perpendicular to the flow direction, with a sub-sequence of planar cross-sections that are perpendicular to the bulk flow direction in the plane in question, the sub-sequence comprising at least one plane that does not overlap with at least one other plane in the sub-sequence.

The invention discloses an oscillating flow micromixer which comprises an oscillator, an inlet channel, circular chambers, connecting channels and an outlet channel; the oscillator, the inlet channel, the circular chambers, the connecting channels and the outlet channel are positioned in the same one plane; the oscillator is arranged at the inlet channel; a first inlet channel is tangentially connected with the first circular chamber, the first connecting channel is tangential to the first circular chamber and the second circular chamber, and the position of the first connecting channel is positioned at the position close to the oscillator; the remaining connecting channels are sequentially tangential to the excircles of the two circular chambers which are connected, and the remaining connecting channels are perpendicular to the front connecting channel and are positioned between the connected circular chambers and the front circular chamber; the outlet channel is tangential to the excircle of the last circular chamber, is perpendicular to the cth connecting channel and positioned between the last two circular chambers. The micromixer is applicable to mixing of high-flow fluid with wide viscosity range, and has better universality.

The present invention provides a measuring device for the vortex-induced vibration response of a parallel flexible riser. The measuring device is characterized in that: adjustment of a distance between the parallel flexible risers is implemented by rotating the bolts; the magnitude of the dynamic response parameters such as the relevant stress and strain is measured; the angle of the plane formedby two risers with respect to the flow field direction is arbitrarily changed; the conditions of the deep water experimental pool are fully used to simulate the response environment of the vortex-induced vibration; by moving the whole device to make the whole device move relative to the fluid, the uniform flow field and the oscillating flow field are simulated; the magnitude of the pre-tension isadjusted by using a tensioner connected at the end of each flexible riser, and the tensioner acts as a buffer during the vibration process; and the influence of the change of the flow field on the riser during the movement is eliminated by using a baffle. According to the technical scheme of the present invention, the device is easy to install, a modular design is used, adjustment of the distancebetween the two risers is independent of the angle adjustment, and the device is easily improved into a multi-riser vibration test device with good adaptability.

The invention aims at providing a visual simulation device for the oscillating flow in a cooling oil passage in a piston of a crosshead type diesel engine. The visual simulation device comprises a host model including a base, a crankshaft, a crosshead, a piston head and a guide rail. The base includes an upper base and a lower base. The crankshaft is installed between the upper base and the lowerbase through a hole channel. The guide rail is fixed on the upper base. The lower end of a connecting rod is connected with the crankshaft by a connecting rod journal of the crankshaft; and a crosshead is connected to the upper end of the connecting rod. Sliding blocks matching the guide rail are installed at the two sides of the crosshead; a groove is formed in the top of the crosshead; the lowerend of the piston rod is installed in the rove; the upper end of the piston rod is connected with a piston head. A cooling oil inlet and a cooling oil outlet are arranged in each sliding block; and aflow-in channel and a flow-out channel are formed in the crosshead. According to the invention, the oscillating flow distribution state and the cooling oil filling condition of the fluid in the piston head can be shot continuously; and the movement state and fullness of the two-phase flows in the cooling cavity at different rotation speeds, different pressures, different flow rates and differentcooling oil temperatures can be recorded.

The invention provides a device for continuously synthesizing 4-bromo-2-p-chloro-5-trifluoromethyl pyrrole-3-nitrile, which comprises a first circulating pump, a first plate type heat exchanger, a second circulating pump, a second plate type heat exchanger and an oscillating flow spiral baffle reactor which are sequentially communicated, wherein the oscillating flow spiral baffle reactor comprisesa shell with an accommodating space, a raw material inlet and a raw material outlet provided in the shell and a baffle plate erected in the accommodating space; the baffle plate is a baffle board; two ends of the baffle plate are respectively communicated with the raw material inlet and the raw material outlet; the baffle plate cuts the accommodating space into a continuous bending structure. Compared with the related art, the device for continuously synthesizing 4-bromo-2-p-chloro-5-trifluoromethyl pyrrole-3-nitrile has the advantages that the reaction time is short; the reaction process iseasy to control with less by-products and high product yield.