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基于动态面搭接网格,求解非定常雷诺平均Navier-Stokes方程模拟螺旋桨滑流与机翼的干扰流动。分别对3种构型,即:单独螺旋桨+短舱构型、螺旋桨+短舱+机翼构型以及短舱+机翼构型进行流场数值模拟,对比分析了机翼对螺旋桨滑流流动结构的干扰,在滑流作用下机翼气动特性的改变以及机翼对螺旋桨桨叶气动力的影响。模拟结果表明:机翼的出现破坏了螺旋桨滑流原有的周期性,改变了其涡量分布,并且在滑流区尤其是翼根附近产生非常复杂的干扰流场;旋转的滑流改变了机翼绕流的当地迎角,从而影响机翼的气动特性,且在小前进比时影响更大。在螺旋桨一个旋转周期内机翼阻力呈现正弦状周期性变化;机翼的存在导致单片桨叶拉力略微增大,并在一个旋转周期内出现两次波动。
Based on the dynamic surface overlap grid, unsteady Reynolds averaged Navier-Stokes equations are solved to simulate the interference flow of propeller slipstream and wing. The numerical simulation of three configurations, ie, propeller + nacelle configuration, propeller + nacelle + wing configuration and nacelle + wing configuration, respectively, were carried out. The effects of wing on propeller slipstream Structure disturbance, change of aerodynamic characteristics of the wing under slip flow, and the influence of the wing on the aerodynamic force of the propeller blades. The simulation results show that the presence of the wing destroys the original periodicity of the propeller slipstream and changes its vorticity distribution and produces a very complicated disturbance flow field near the slipstream, especially the wing root. The rotating slipstream changes The local angle of attack of the airfoil around the flow affects the aerodynamic characteristics of the wing and has a greater impact when small forwards. During one revolution of the propeller, the resistance of the wing presents a sinusoidal periodic change. The existence of the wing leads to a slight increase of the pulling force of the blade, with two fluctuations in one revolution.