Experimental Prediction Methodology of Broadband Noise Generated from a Cooling Fan
Experimental Prediction Methodology of Broadband Noise Generated from a Cooling Fan
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冷却风扇产生的宽带噪声的实验预测方法
DOI：
10.11458/tsj.48.4_216
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
佐々木壮一
中科院分区：
文献类型：
--
作者：
Keiko Hori;Takanori Matsui;Satoshi Ono;Ken'ichi Fukui;Takashi Hasuike;Takashi Machimura;堀啓子，松井孝典，小野 智司，福井健一，蓮池隆，町村尚;佐々木壮一
提出了用叶素动量理论预测低压冷却风扇宽带噪声的实验方法。对于宽带噪声的预测方程，应用了具有湍流边界层的翼型声辐射理论。在平板气动噪声风洞试验的基础上，利用实测的风扇近尾迹流态，对风扇宽带噪声进行了实验预测。用所提出的方法进行的预测可以解释冷却风扇工作点低频域宽带噪声的降低是压力侧分离降低尾涡噪声的效果。
The experimental prediction methodology of the broadband noise for a low-pressure cooling fan by the blade element momentum theory is proposed. For the prediction equation of the broadband noise, the theory on the acoustic radiation from airfoil with turbulent boundary layer is applied. The broadband noise of the fan is predicted experimentally by using the measured flow regime in the near wake of the actual fan based on the results of the wind tunnel test on the aerodynamic noise of a flat plate. The prediction by the suggested methodology could explain the reduction of the broadband noise in the low frequency domain in the operation point of the cooling fan is the effect of the reduction of the wake vortex noise made by the pressure side separation.