螺旋桨滑流与机翼气动干扰的非定常数值模拟

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:单独螺旋桨十短舱构型、螺旋桨十短舱十机翼构型以及短舱十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:...

Unsteady Numerical Simulation of Interaction Effects of Propeller and Wing

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.