Experimental Evaluation on Vehicle Aerodynamic Noise Performance

Abstract

In this study, a passenger car was tested for its aerodynamic noise performance in terms of sound pressure level in the wind tunnel at Tongji University (Shanghai Automotive Wind Tunnel Center), where the phase microphone array was used along with sound surface microphones and artificial heads combining with the adhesive tape sealing method. The wind noise sources, the noise level on the exterior surface and the sealing influence on the interior noise level were evaluated. Based on datum of the tested subject, the potential design problem associated with the body structure and seals are identified, the main aerodynamic noise sources and their transfer path are located. The details about the setup of the experiment, data collection and processing method offered in this study can be used to not only help improve the tested vehicle aerodynamic noise performance, but also provide a long-term reference value for the aero-noise research community.