Development of a new excitation device and system for pipeline pulsating pressure
In order to experimentally study the dynamic response characteristics and reliability issues of fluid flow components or systems of rocket engine in pulsating flow states,there is an urgent need for a device to generate pulsating flow with controllable frequency and amplitude.New type of pulsating pressure excitation device and system was developed,which consists of the excitation device body,magnetic transmission and control system.Built-in rotating wheel mechanism was designed,which periodically opens and closes the pipeline during rotation,thereby generating pulsating pressure in the pipeline.Electromagnetic induction transmission device was used for achieving leak free transmission of torque and power.By adopting automatic control of wheel speed changes,frequency variation control of pulsating pressure is achieved.The experiment shows that the excitation device system can generate pulsating pressure excitation with a frequency of 0-250 Hz in 18 MPa,with a pressure time domain amplitude exceeding 7 MPa and a frequency division amplitude exceeding 6.6 MPa.The excitation device system can adjust the amplitude of pulsating pressure by adjusting the flow rate and changing the aperture of the orifice plate.Two different excitation methods,fixed frequency or sweep frequency,can be achieved by changing the speed.The excitation device system achieves zero leakage during operation and is suitable for medium environments such as high pressure,low temperature,toxic or flammable environments.It can effectively solve the implementation problem of pipeline pulsation pressure excitation under special conditions.
high pressure pipelineexcitation devicepulsating flow excitationfixed frequency excitationsweep frequency excitationzero leakage
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维普
