同向旋转螺旋桨对着陆构型气动影响分析

摘要

基于分区对接网格技术分别生成翼身区域和螺旋桨区域网格,并通过求解定常N-S方程模拟螺旋桨滑流影响下全机流动.通过对某螺旋桨飞机的着陆构型(机翼+短舱+螺旋桨+机身+平垂尾)进行数值模拟,结果与实验值吻合较好.模拟结果表明:螺旋桨滑流会改变机翼当地绕流迎角、影响压力分布；当螺旋桨同向旋转时,机身两侧襟翼的分离会出现在不同位置并改变升力在机翼展向的分布,进而对全机产生一个滚转力矩.%The flow field around a plane under propeller slipstream has been numerically simulated by solving steady Navier- Stokes equations, with the computational grid of wing- body and propeller zone being generated separately by zonal patched grid technique. The result of the numerical simulation of a turbo -propeller airplane landing configuration shows it matches the experimental result well. The numerical results indicate that: propeller slipstream would influence the local angle of attack of the flow field around the wing and the pressure distribution. When the propellers are co- rotating,the separation on the flaps at each side of the body would occur at different locations, then resulting in a change of the lift distribution alone the wing span and a rolling moment.