采用准定常N-S方法,通过单独螺旋桨模型计算结果与非定常、试验结果的对比,验证了计算螺旋桨滑流的可行性.重点对带两台螺旋桨发动机的增升装置流场特性进行了计算分析,研究了螺旋桨滑流对飞机流场和气动性能的影响.研究结果表明:螺旋桨滑流明显改变了机翼表面的压力分布,使飞机升、阻力系数增大.为螺旋桨飞机设计提供了一种快速、有效的数值模拟手段,在工程领域具有一定的应用前景.%A series of quasi- steady CFD simulations have been conducted for a generic isolated and installed- propeller configuration at low- speed flight conditions. The computations were performed with the method which based on isolated propeller and the numerical results agree well with unsteady simulation data and experimental data. The research puts emphasis on the three dimensional flow fields around a two engine turbo- prop high- lift configuration. The effects of propeller slipstream on the characteristics of the flow field are. Detailed analyzed and the increments of lift and drag coefficients caused by slipstream are presented. These studies provide quick and valid numerical simulation method for propeller- driven aircraft design and possess higher utility value in engineering.
展开▼
