论文部分内容阅读
基于Gliebe发展的风扇自噪声经验预测模型与Mugridge-Morfey发展的湍流-叶片干涉噪声分析预测模型,以GE公司R4风扇为研究对象,详细分析了风扇自噪声与转子尾迹湍流-出口导叶干涉宽频噪声(湍流干涉噪声)的特性.研究了不同的风扇设计参数和湍流参数对风扇自噪声与湍流干涉噪声的影响.计算结果表明:湍流干涉噪声对风扇宽频噪声起着主要作用,湍流干涉噪声比转子自噪声大约6~10dB,比出口导叶自噪声大约20dB.此外,出口导叶来流速度对湍流干涉噪声的影响最大,来流速度增大15%时,声功率可增大4dB左右.湍流强度对湍流干涉噪声影响较大,当湍流强度增加30%时,声功率增大约1.5dB.
Based on Gliebe’s fan self-noise empirical prediction model and Mugridge-Morfey’s turbulence-blade interference noise analysis and prediction model, taking GE R4 fan as a research object, this paper analyzes fan self-noise and rotor wake turbulence-exit guide vane interference wide band Noise (turbulence interference noise). The influence of different fan design parameters and turbulence parameters on fan self-noise and turbulence interference noise is studied. The results show that turbulence interference noise plays a major role in fan wide-band noise, and turbulent interference noise ratio The rotor self-noise is about 6 ~ 10dB, which is about 20dB more than the outlet guide vane noise. In addition, the outlet guide vane flow velocity has the greatest influence on the turbulent interference noise. When the flow velocity is increased by 15%, the sound power can increase about 4dB. The turbulence intensity has a great influence on the turbulent interference noise. When the turbulence intensity increases by 30%, the acoustic power increases about 1.5dB.