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发展并改进了一套基于非结构网格的旋转动态嵌套网格方法,通过数值求解Navier-Stokes方程对二维/三维带旋转运动边界的非定常问题进行了数值模拟。将计算区域划分成包含旋转运动边界的运动区子域和覆盖其它静止边界的静止区子域,以人工边界和约束线(面)作为约束条件生成整体计算网格,进而根据设置的人工边界完成嵌套网格的建立。对翼型绕流、旋翼/机身干扰流场以及颤振激励系统绕流进行了验证计算,结果与实验值相一致,表明了文中方法能够有效地对带有旋转运动边界的非定常问题进行数值模拟。
A set of rotating nested grid method based on unstructured grids is developed and improved. The unsteady boundary conditions of 2D / 3D rotating boundary are numerically simulated by solving the Navier-Stokes equations numerically. The computational domain is divided into motion region subdomains containing rotational motion boundaries and static region subdomains covering other stationary boundaries. The artificial boundary and constraint lines (surfaces) are used as constraints to generate the global computation meshes, which are then completed according to the set artificial boundary The establishment of nested grid. The flow field around airfoil, the rotor / fuselage interference flow field and the flutter excitation flow around the system are validated. The results agree well with the experimental results, which show that the proposed method can effectively solve the unsteady problem with rotational motion boundary Numerical Simulation.