Research On Inspiration Performance Of Self-excited Inspiratory Pulsed Jet Device

Based on the summary of a great of literature home and abroad, this paper focuses on thetheoretical analysis, calculation and study on the inspiratory performance parameters oflow-pressure high-flow self-excited inspiratory pulsed jet device. Obtained the optimalinspiratory way, inspiratory capacity characteristics under different ambient pressures anddevice performance of low-pressure high-flow self-excited inspiratory pulsed jet device.Experiment provides basis for the in-depth study on self-excited inspiratory pulsed jettechnology and it’s using on projects like reservoir desilting.Chapter Ⅰ outlines the research and application of the self-excited oscillation pulsed jet.Chapter Ⅱ derived natural frequency, the wave velocity and jet frequency formula ofself-excited inspiratory pulse jet device on the basic of using fluid network theory andacoustic theory, and combined with jet characteristics in submerged condition, the authorexplores the mechanism of the gas absorption of the ambient pressure pulsed jet device.Chapter Ⅲ studies on the low-pressure high-flow self-excited inspiratory pulsed jetinspiration parameters and device performance (including shallow water submerged conditionand deep-water submerged condition). The impact of inspiratory parameters to deviceperformance and jet frequency were analyzed through the shallow water submerged test,different parameters on device performance and change characteristics of the deviceinspiratory capacity were studied through the deep-water submerged test. Determined theoptimal inspiratory way of the low-pressure high-flow self-excited inspiratory pulsed jetdevice, developed the changes in characteristics of inspiratory under different ambientpressures and their regression analysis, initially proposed the concept of start-up inspiratorypressure.