螺旋桨飞机滑流非定常数值模拟研究

Research on Unsteady Numerical Simulation of Propeller Aircraft Slipstream

采用非定常数值模拟方法,基于滑移网格技术,分析研究螺旋桨滑流对全机气动特性的干扰影响。用多块结构网格数值模拟软件,从搭接边界建立、搭接网格生成、流场插值传递3个方面对螺旋桨滑移搭接网格的数值模拟方法进行全面详细的介绍,并且阐述基于该技术的非定常数值模拟方法。在此基础上,开展螺旋桨飞机模型验证计算,分析研究螺旋桨滑流对全机流场和气动性能的影响,通过与风洞实验数据的对比分析,验证滑移搭接网格技术的可行性与准确性。研究结果表明,基于滑移搭接网格技术的螺旋桨滑流数值模拟,可以真实反映螺旋桨滑流流场特性,为螺旋桨类飞机的设计评估提供一种有效的数值模拟手段,在工程方面具有重要的实用价值。

The effect of propeller slipstream on the aerodynamic characteristics has been analyzed using the unsteady numerical method,which based on sliding mesh technology. This simulation used our inhouse solver based on structured mesh in this paper. Unsteady numerical method using sliding patched mesh was introduced detailedly in three aspects including patched boundary,the patched grid and the interpolation method. And the procedure to implement this method is presented generally. On this basis,the three dimensional flow field around a turbo- prop wing body configuration is simulated especially. The effects of propeller slipstream on the characteristics of the flow field and aerodynamic are analyzed. Through the comparison with the experiment data,the feasibility and accuracy of sliding patched technology are verified. The results show that the flow field of the slipstream can be simulated factually by the numerical method based on the sliding patched technology. This study provides a valid numerical simulation method for propeller- driven aircraft design and possesses higher utility value in engineering.