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所属单位：航空学院

发表刊物：Hangkong Xuebao

摘要：Rotor blade-vortex interaction (BVI) noise is one of the main objectives of rotor aerodynamic noise reduction. The higher harmonic control (HHC) method has been demonstrated to be an effective rotor noise reduction method. To obtain noise reduction effects, noise reduction mechanism and parameter effects of the HHC method, a CFD method for simulating blade-vortex interaction is established based on moving-embedded grid method and compressible Reynolds averaged Navier-Stokes (RANS) equations. Based on the previous flowfield calculations and FW-H equations, a noise prediction method CFD/FW-H is established to predict the BVI noise. The case of BO-105 rotor with HHC is calculated using the proposed method. The calculation results obtained by simulating different CFD cases demonstrate that the sound pressure levels of the case with HHC are reduced by 4-7 dB during low speed descent. The effects of the frequency, phase and the amplitude of HHC on rotor BVI noise control have been analyzed. Some conclusions about relative parameter effect rules have been obtained and the mechanism of HHC has been further explained based on the influence of amplitude on noise reduction effects of HHC. © 2017, Press of Chinese Journal of Aeronautics. All right reserved.

ISSN号：1000-6893

是否译文：否

发表时间：2017-10-25

合写作者：陈丝雨,倪同兵,朱正

通讯作者：招启军