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。

Unsteady Reynolds averaged Navier-Stokes equations are solved to analyze the aerodynamical interaction effects between propeller and wing based on dynamic patched grid. Numerical simulations are conducted on three geometric configurations, which are isolated propeller with nacelle, propeller installed on the wing with nacelle and the nacelle with wing respectively. For the isolated propeller, swirls in slipstream flow pass periodically. While they are disturbed by the wing after the propeller is installed. The vorticity distributions are altered and very complex flow structures are induced especially near nacelle. The aerodynamic characteristics of wing are influenced since the local angles of attack are changed by the swirls in slipstream. Slipstream at lower advance ratio produces larger impaction on wing pressure distribution. Additionally, the wing drag develops with sinusoidal fluctuations as the propeller rotates. On the other side, the blade thrust increases a little with two oscillations during a rotation period due to the wing presence.