摘要
基于流动与声传播方向之间的理论关系,采用声源识别设备对区域流体涡量给出一种非接触式测量方法。首先基于射线追踪法、波束成形声源识别和风洞声漂移计算方法等相关基础理论与方法,给出测试原理的推导与简化过程,并确定目标区域设定方法以及具体的计算公式。然后对实施方法,如设备要求、测量步骤予以明确并限定测试方法的使用范围。最后通过声学风洞试验对本方法进行了展示和验证,证明该方法能够有效测量目标区域内总涡量平均值与瞬时值。
Based on the theoretical relationship between flow and sound propagation direction,a non-contact measurement method of regional fluid vorticitywas proposedby using sound source identification equipment.Firstly,the basic theoryand methods including ray tracing method,beamforming source identification and wind tunnel acoustic drift calculation were introduced.Secondly,the derivation and simplification process of the test principle were given,and the setting method of the target area and the specific calculation formula were determined.Then the implementation methods such as equipment requirements and measurement steps were standardized,and the application scope of the test method was limited.Finally,the method was demonstrated and verified by acoustic wind tunnel test,which proves that the method can effectively measure the average and instantaneous value of total vorticity in the target area.
作者
陈力
沈哲
杨志刚
CHEN Li;SHEN Zhe;YANG Zhigang(School of Automotive Studies,Tongji University,Shanghai 201804,China;Shanghai Automotive Wind Tunnel Center,Tongji University,Shanghai 201804,China;Shanghai Key Laboratory of Vehicle Aerodynamics and Vehicle Thermal Management Systems,Tongji University,Shanghai 201804,China;Beijing Aeronautical Science&Technology Research Institute,Beijing 102211,China)
出处
《实验室研究与探索》
CAS
北大核心
2021年第11期42-45,共4页
Research and Exploration In Laboratory
基金
上海市重点实验室项目(18DZ2273300)
上海市专业技术服务平台项目(19DZ2290400)。
关键词
涡量
非接触测量
声源识别
射线追踪
vorticity
non-contact measurement
sound source identification
ray tracing
