整车风洞射流对声传播路径影响的试验研究  

An Experimental Study on the Effects of Jet Flow in Wind Tunnel for Full-scale Vehicle on Sound Propagation Path

作　　者：沈哲[1] 王毅刚[1] 杨志刚[1] 李方旭[2] 

机构地区：[1]同济大学汽车学院,上海201804 [2]同济大学,上海地面交通工具风洞中心,上海201804

出　　处：《汽车工程》2016年第12期1440-1445,1451,共7页Automotive Engineering

基　　金：国家自然科学基金(51375342)资助

摘　　要：对整车风洞射流结构对声传播路径的影响进行了试验研究。设计了翼型音箱,用传声器阵列进行声源定位,测量了全尺寸3/4开口式风洞中多种参数条件下的声漂移量。结果表明,射流速度和声源位置的影响较大,而声源的种类与高度和测量点位置的影响可以忽略。用试验数据拟合出了整车声学风洞中声漂移量的预测公式并验证了其精度和适用范围。An experimental study on the effects of the jet structure of the wind tunnel for full-scale vehicle on sound propagation path is conducted. Airfoil speaker is designed with a microphone array used to locate sound source,and the sound drift in full scale 3 /4 open-jet wind tunnel under various parameter conditions are measured.Test results show that jet flow velocity and sound source location are more influential,while the effects of the type and height of sound source and measuring point location are ignorable. A prediction equation of sound drift in the wind tunnel for full-scale vehicle is fitted out based on test data,with its accuracy and application scope verified.

关 键 词：风洞 射流 声漂移 传声器阵列 

分 类 号：U467.13[机械工程—车辆工程]