基于嵌套网格技术和多种空间离散格式的旋翼流场数值模拟

Numerical Simulation of Rotor Flowfield Based on Overset Grids and Several Spatial Discretisation Schemes

给出了三维Euler/N-S方程数值模拟悬停状态旋翼流场的方法和模型。在空间离散方法上分别采用Jame-son中心差分格式、Van Leer矢通量分裂格式、AUSM格式3种方法,同时加入了Van Albada限制器,并应用了嵌套网格方法。文中采用Hole-Map方法来确定洞边界,采用Inverse-Map方法来搜寻贡献单元。最后给出了旋翼桨叶表面压力分布的计算结果,并与实验数据进行了对比,证明以上3种空间离散格式在旋翼流场计算中的准确性。

A numerical method based on solutions of 3-D Euler/N-S equations is used for calculating the rotor flowfield in hover.Jameson central scheme,Van Leer scheme and AUSM scheme are implemented for spatial discretisation,and Van Albada limiter is also applied.Simultaneously,overset grids are adopted.Hole-Map method is utilized to identify intergrid boundary points（IGBPs）.Furthermore,aiming at identification issue of donor elements,Inverse-Map method is implemented. Finally,blade surface pressure distributions derived from numerical simulation are validated compared with the experimental data.Results show that all the schemes mentioned above can accurately simulate the rotor flowfield.