摘要
本文采用基于CFD/FW-H的旋翼气动/噪声计算模型,针对悬停及中小速度前飞时,考虑机身对旋翼涡流场、非定常气动载荷和噪声特性的干扰影响,开展了直升机机身干扰状态下的旋翼气动和噪声特性数值计算分析研究,获得了不同飞行状态下,机身对旋翼涡流场、气动力和噪声特性的影响规律。计算结果表明,机身对旋翼气动力的影响主要存在于0°和180°方位角附近,且桨叶内段受影响较大,但在不同的飞行状态下,机身对旋翼气动力的影响规律存在不同特点;此外,由机身干扰引起的桨叶载荷变化对旋翼气动噪声的影响很小。
A comprehensive analysis code of the rotor aerodynamics and aeroacoustics based on the CFD/FW-H method is used to calculate rotor vortex-flowfield, unsteady aerodynamics and aeroacoustics under the fuselage interaction at hover and forward flight. Based on the calculation results, the influence law and mechanism of fuselage interaction on the rotor flowfield, aerodynamics and aeroacoustics are obtained. The results indicate that the interaction influence of fuselage on the rotor aerodynamics mainly exists at about the azimuthal angle 0°and 180°, and the inboard section of blade is influenced more strongly than the outboard section. Meanwhile, the interaction influence law is different for hover and forward flight condition. In addition, influence of blade airloads change on the rotor acoustics caused by fuselage interaction is small.
作者
靳鹏
樊枫
Jin Peng;Fan Feng(Science and Technology on Rotorcraft Aeromechanics Laboratory,China Helicopter Research and Development Institute,Jingdezhen 333001,China)
出处
《航空科学技术》
2021年第6期9-20,共12页
Aeronautical Science & Technology
关键词
气动干扰
气动特性
噪声特性
旋翼
机身
aerodynamic interaction
aerodynamics
aeroacoustics
rotor
fuselage
