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在以往发展的动态混合网格技术的基础上,耦合六自由度运动方程计算和非定常流场计算,建立了一种多体分离问题的非定常数值模拟方法。首先采用刚体运动的六自由度运动方程,建立刚体运动轨迹计算模块,然后以该模块为纽带将以往建立的非定常计算方法与改进的基于Delaunay背景网格插值方法和局部网格重构方法相结合的动态混合网格生成方法耦合起来,形成了精度较高、效率较快的多体分离数值模拟方法。利用该方法对典型多体分离问题进行了数值模拟,计算结果与风洞实验结果吻合较好。
Based on the dynamic hybrid grid technology developed in the past, coupled with the calculation of six degree of freedom equations of motion and unsteady flow field calculation, an unsteady numerical simulation method for multi-body separation problems is established. Firstly, a six-degree-of-freedom equation of motion for rigid body motion is used to build a rigid body motion trajectory calculation module. Then, the module is used as a link between the unsteady calculation method established in the past and the improved Delaunay background mesh interpolation method and the local mesh reconstruction method Combined with the method of dynamic hybrid mesh generation, a multi-body separation numerical simulation method with high precision and high efficiency is formed. A typical multi-body separation problem is numerically simulated by this method. The calculated results are in good agreement with the wind tunnel test results.