摘要
研究气体作用于固体表面湍流压力脉动与声压脉动的试验分离技术。论述气体中两种压力脉动的区别,包括产生机理、传播速度和穿透效率等。结合较为常用的电容式膜片表面声压测量和较新的湍流滤网,在同一测点上分别使用以上两种测试技术进行测量,形成一种用于分离两种不同压力脉动的测试方法。通过一组针对两种压力脉动的声学风洞试验,实测两种测试技术在频域上的差别,结果证明用该测试方法能较为有效地分离两种压力脉动。
The experimental method for separating turbulent pressure and acoustic pressure fluctuation caused by the gas around solid surfaces was investigated.The differences between the two kinds of gas pressure fluctuation,including production mechanism,transmission velocity and penetration efficiency were discussed.The surface acoustic wave pressure sensor with the capacitive diaphragm and the turbulence filter were applied simultaneously at the same measurement point,and a pressure fluctuation separation method was developed.The difference between the two methods in frequency domain was measured by a group of acoustic wind tunnel tests for separating two kinds of pressure fluctuation,and the effectiveness of the test method is verified.
作者
沈哲
王毅刚
杨志刚
SHEN Zhe;WANG Yigang;YANG Zhigang(Shanghai Automotive Wind Tunnel Center,Tongji University,Shanghai 201804,China;Postdoctoral Station of Mechanical Engineering,Tongji University,Shanghai 201804,China;Shanghai Key Lab of Vehicle Aerodynamics and Vehicle Thermal Management Systems,Shanghai 201804,China;Beijing Aeronautical Science&Technology Research Institute,Beijing 102211,China)
出处
《汽车工程学报》
2019年第6期408-412,共5页
Chinese Journal of Automotive Engineering
基金
上海市重点实验室项目(18DZ2273300)
关键词
风洞
湍流压力
声压
测试技术
wind tunnel
turbulent pressure
acoustic pressure
test method
