Jet Piv Wind Tunnel Test Technology Based on High Pressure Micro-fog System
In order to measure the high-pressure and high-speed jet flow field at the tail nozzle of an engine,a high-pressure micro-mist system was developed based on the conventional flow visualization and measurement technology.By using the combination of high pressure micro-mist system,jet test system and PIV flow field measurement system,the display and measurement of high pressure and high speed jet flow constant are carried out,the velocity distribution of the jet flow at the nozzle of the engine tail is obtained.In this technology,the tracer particles are first driven into the mixing chamber and mixed with the high pressure gas by the high pressure micro-mist system,and then mixed twice by the high pressure gas supply system inside the jet model,the tracer particles are fully mixed with the high-pressure gas and ejected from the tail nozzle,then the flow field is measured by PIV technique.The results show that the experimental technology has the characteristics of real-time and non-interference,and can accurately obtain the flow field distribution of engine jet.
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