某空腔低速流动噪声风洞试验

doi:10.7527/S1000-6893.2014.0278

流体力学与飞行力学

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某空腔低速流动噪声风洞试验

赵小见, 赵磊, 冯峰, 艾邦成

中国航天空气动力技术研究院, 北京 100074

收稿日期:2014-09-04 修回日期:2014-10-04 出版日期:2015-07-15 发布日期:2014-11-15
通讯作者: 赵小见男, 博士, 工程师。主要研究方向: 气动声学及结构声学。 Tel: 010-68743315 E-mail: adai078@126.com E-mail:adai078@126.com
基金资助:
武器装备预研基金

Wind tunnel test into noise induced by low-speed cavity flow

ZHAO Xiaojian, ZHAO Lei, FENG Feng, AI Bangcheng

China Academy of Aerospace Aerodynamics, Beijing 100074, China

Received:2014-09-04 Revised:2014-10-04 Online:2015-07-15 Published:2014-11-15
Supported by:
Military Hardware Foundation

摘要/Abstract

摘要：

针对某空腔低速流动噪声机理问题,发展并应用了脉动压力风洞试验及相阵列风洞试验相结合的方法。脉动压力试验是通过离散点测量方法获得空腔内典型测点的脉动压力统计参数及其功率谱密度函数。脉动压力功率谱存在典型的特征频率,从脉动压力功率谱密度函数中提取空腔流动特征频率,相阵列试验针对空腔流动特征频率所对应的声源进行逐一声源辨识及声源强度评估,声源强度随来流的变化关系与脉动压力变化规律相符合。针对某空腔结构的脉动压力风洞试验及相阵列风洞试验相结合的方法为空腔流动机理认识及空腔流动噪声控制技术研究提供了有效技术手段。

关键词: 空腔, 脉动压力, 流动噪声, 相阵列, 风洞试验

Abstract:

For the investigation of low-speed flow mechanism for a certain cavity, the fluctuation pressure test in wind tunnel and phase array technology are developed and applied in the paper. The method of fluctuation pressure test is a kind of scattered point test method which will provide typical statistical value and power spectrum density function of fluctuation pressure. The characteristic frequencies exist in fluctuation pressure power spectrum. The characteristic frequencies are distilled and the sound sources for characteristic frequencies are identified and evaluated with phase array technology one by one.The strength of sound source varying with incoming flow agrees well with the changing law of fluctuation pressure swing. The mixture of fluctuation pressure test method and phase array technology will provide an effective way to investigate the cavity flow mechanism and control the noise induced by cavity flow.

Key words: cavity, fluctuation pressure, flow noise, phase array, wind tunnel test

中图分类号:

V211.71

赵小见, 赵磊, 冯峰, 艾邦成. 某空腔低速流动噪声风洞试验[J]. 航空学报, 2015, 36(7): 2145-2154.

ZHAO Xiaojian, ZHAO Lei, FENG Feng, AI Bangcheng. Wind tunnel test into noise induced by low-speed cavity flow[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2015, 36(7): 2145-2154.

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E-mail：hkxb@buaa.edu.cn

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主管单位：中国科学技术协会主办单位：中国航空学会北京航空航天大学

某空腔低速流动噪声风洞试验

Wind tunnel test into noise induced by low-speed cavity flow

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