预测直升机旋翼气动噪声的新方法

详细信息

NOISE GENERATED BY A HELICOPTER ROTOR

Tsinghua University, Beijing 100084;2. Northwestern Polytechnical University, Xi'an 710072

摘要: 本文详细介绍了Kirchhoff方法,并且针对具体计算模型作了相应修改,在求解直升机旋翼流场的基础上,预测了旅翼在悬停状态下的高速冲击运场噪声,计算结果与理论分析一致,体现出旋翼CFD与Kirchhoff方法相结合的良好应用前景。
- 旋翼 /
- 气动噪声 /
- Kirchhoff方法
Abstract: A combined Euler/Kirchhoff method is presented for predicting high-speed impulsive noise generated by a hovering rotor blade. Although lacking experimental verification. the results are promising. The results show that some benefit can be made by taking thin、sweep and taper blade-tip Shape in reducing the far-field noise. The modification is made. It is shown that the combined Euler/Kirchhoff scheme provides a powerful tool for engineering purposes.
- rotor /
- aeroacoustic noise /
- Kirchhoff method