直升机旋翼气动噪声的研究新进展

随着直升机的广泛使用,旋翼气动噪声问题逐渐得到重视。概述了旋翼厚度噪声、载荷噪声、高速脉冲(HSI)噪声、桨-涡干扰(BVI)噪声和宽带噪声的国内外研究现状,简述了旋翼气动噪声理论、试验、计算发展历程以及各阶段的研究成果,并对后缘襟翼、高阶谐波控制(HHC)、单片桨叶控制(IBC)、主动扭转桨叶等噪声控制方法和概念进行了介绍。重点叙述了旋翼气动噪声的研究新进展,包括大气、地面和飞行轨迹等对直升机旋翼噪声的影响,机身散射声场以及机动噪声计算方法等方面取得的成就。对直升机旋翼气动噪声的研究进行了总结,并对其发展前景提出了展望。

New research progress in helicopter rotor aerodynamic noise

Helicopter rotor aerodynamic noise has become an important research topic in helicopter technology with the widespread use of helicopters.This paper outlines the current status of the research on rotor thickness noise,loading noise,high speed impulsive (HSI) noise,blade vortex interaction (BVl) noise,and broadband noise.Domestic and foreign research on numerical calculation methods and experimental methods for rotor noise are reviewed,and the application of trailing-edge flap,higher harmonic control (HHC),individual blade control (IBC) and active twist blade to rotor noise control are also introduced.The latest research progress in helicopter rotor aeroacoustics noise is described,including new progress in the effects of atmosphere,ground and flight trajectory on the rotor aerodynamic noise,and the methods for calculating the acoustic scattering field of helicopter fuselage and maneuvering noise.The main work of the research on aerodynamic noise of the helicopter rotor is concluded and some prospects are also presented.