朱曾辉,陈小军,李舒,陈杨
ZHU Zenghui,CHEN Xiaojun,LI Shu,CHEN Yang

• 1:中国船舶重工集团公司第七二四研究所

摘要(Abstract)：

基于FW-H方程,对离心风机进行气动声学理论分析,结合噪声测试方法,对某雷达天线系统进行噪声试验研究分析。测试数据表明,噪声和振动加速度频谱图分布较为接近,噪声振动能量峰值频率均为离心风机叶片基频的倍频,即雷达天线系统噪声主要来源于离心风机的气动噪声。通过改变均热板上翅片与风机叶片边缘的间距和调节风机转速,对单个离心风机开展噪声试验研究。由实验结果可知,随着间距增大,其噪声值降低,且噪声能量逐渐集中分布在低频区域;离心风机噪声值随着其转速增大而增加,不同工况下离心风机噪声能量均在其叶片基频的二倍频处最大。噪声试验获得的不同工况下离心风机噪声云图可为雷达天线系统均热板的结构优化设计提供试验和理论依据。
Based on FW-H equation,the aeroacoustic theory of centrifugal fan was analyzed,and the noise test of a radar antenna system was carried out in combination with the noise test method.The test data show that the frequency spectrum of the noise and the vibration acceleration was close to each other,and the peak frequency of the noise and vibration energy was the frequency multiplication of the fundamental frequency of the centrifugal fan blade,that is,the noise of radar antenna system mainly comes from the aerodynamic noise of the centrifugal fan.By changing the spacing between the fins of the vapor chamber and the edge of the fan blade and the rotating speed of the fan,the noise test of a single centrifugal fan was carried out.The experimental results show that the noise decreases with the increase of spacing,and the noise energy is gradually concentrated in the low frequency region.The noise of centrifugal fan increases with the increase of its speed,and the noise energy of the centrifugal fan is the largest at the double frequency of its blade fundamental frequency under different working conditions.The noise image of the centrifugal fan under different working conditions obtained by the noise reduction test can provide the experimental and theoretical basis for the optimization design of the vapor chamber structure of the radar antenna system.

关键词(KeyWords)： 雷达天线系统;离心风机;FW-H方程;噪声试验
radar antenna system;centrifugal fan;FW-H equation;noise test

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 朱曾辉,陈小军,李舒,陈杨
ZHU Zenghui,CHEN Xiaojun,LI Shu,CHEN Yang

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