实验流体力学2012，Vol.26Issue(2)：72-76,5.
常规闭口风洞相阵列气动声学试验
Aeroacoustic phased array measurements in closed-section wind tunnel
赵磊 1赵小见 1李潜1
作者信息
- 1. 中国航天空气动力技术研究院,北京100074
- 折叠
摘要
Abstract
As conventional viewpoint, aeroacoustic measurements require low background noise and minimal reflections for accurate results. So proper design of wind tunnel components and test apparatus are critical to successful aeroacoustic measurements. Over the past several years, microphone phased arrays have been developed based on sonar and radar technology. One of the biggest advantages is that the signal to noise ratio (SNR) is increased with the number of sensors in the array. This technology can be used to measure and identify the noise sources. It has been used in non-acoustic, hardwall wind tunnels, as a research tool to gain insight into noise and into the physical mechanisms causing the noise. Based on the frequency domain approach of beamforming algorithm, microphone phased array system has been developed by the author for aeroacoustic measurements in low speed closed-section wind tunnel. Array calibration and aeroacoustic measurements for a commercial aircraft were performed in FD-09 wind tunnel. The results indicated that array can identify the calibration resource accurately, and the availability of aeroacousitc measurement was validated by array calibration and application in low speed closed-section wind tunnel.关键词
声学测量/相阵列/风洞试验/数据处理/气动噪声Key words
aeroacoustic measurement/ phased array/ wind tunnel test/ data processing/ aerodynamic noise分类
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赵磊,赵小见,李潜..常规闭口风洞相阵列气动声学试验[J].实验流体力学,2012,26(2):72-76,5.
