螺旋桨滑流对自转旋翼气动特性影响分析  

Analysis on the Propeller Slipstream Interference with Autorotating Rotor Aerodynamic Characteristics

作　　者：吴伟伟[1] 马存旺[1] 孙凯军[1] WU Weiwei;MA Cunwang;SUN Kaijun(Caihong UAV Technology Co.,Ltd.,China Academy of Aerospace Aerodynamics,Beijing 100074,China)

机构地区：[1]中国航天空气动力技术研究院彩虹无人机科技有限公司,北京100074

出　　处：《航空工程进展》2020年第2期176-183,共8页Advances in Aeronautical Science and Engineering

摘　　要：前飞时,自转旋翼机的螺旋桨滑流穿过桨盘平面,会对旋翼产生非定常气动干扰。基于RANS(雷诺平均Navier-Stokes)方程,采用运动嵌套网格方法建立适用于自转旋翼-螺旋桨气动干扰流场的计算分析方法,并对模型进行模拟;分析低速情况下,孤立状态自转旋翼和组合状态自转旋翼非定常气动特性及流场特性,同时分析不同速度和螺旋桨位置对自转旋翼气动特性的影响。结果表明:螺旋桨滑流会影响自转旋翼在各个方位角的升阻力特性,并使得自转旋翼尾迹在0°方位角附近发生畸变;相同拉力下,来流速度越大旋翼后倾角越小,螺旋桨滑流对自转旋翼的影响越小;增大螺旋桨与自转旋翼的间距可以减弱螺旋桨滑流对自转旋翼的气动干扰。The propeller slipstream passed through the rotor plane when the autogyro is flying forward, will produce the unsteady aerodynamic interference on the autorotating rotor. Based on the RANS equations(Reynolds averaged Navier-Stokes), a computational analysis method for the aerodynamic interference flow field of autorotating rotor-propeller is established by using the moving embedded grids method, and the model is simulated. The unsteady aerodynamic characteristics and flow field characteristics of the isolated and combined autorotating rotor at low speed are analyzed. The effects of different velocities and propeller positions on the aerodynamic characteristics of the spinning rotor are studied. The results show that the propeller slipstream affects the lift-drag characteristics of the autorotating rotor at all azimuths, and causes the distortion of the rotor wake near 0° azimuth. Under the same rotor thrust, the larger the inflow velocity, the smaller the rotor tilt angle, and the smaller the influence of propeller slipstream on the autorotating rotor. Increasing the pitch between the propeller and the autorotating rotor can reduce the aerodynamic interference of the propeller slipstream on the rotor.

关 键 词：自转旋翼 螺旋桨滑流 气动干扰 非定常载荷 

分 类 号：V211.3[航空宇航科学与技术—航空宇航推进理论与工程]