基于非结构网格的离子推力器羽流数值模拟方法研究

为适应复杂的航天器外形,文章采用基于非结构网格的数值模拟方法研究离子推力器真空羽流的基本特征。首先,介绍了非结构网格划分的方法,并分析了建模区域生成各种拓扑关系的特点;然后,提出了粒子穿越网格的具体算法,包括有利于减少计算量的结合矩阵重标号的带宽压缩算法;最后,开展了模拟结果和试验结果的对比研究,验证了以上数值模拟方法的可行性。

A method for numerical simulation of ion thruster's plume based on unstructured mesh

A method of particle simulation based on unstructured mesh is proposed in this paper to reveal the basic characteristics of ion thruster''s plume with complex spacecraft configurations. The method of grid discretization and the topological relationship among the generation of grids are discussed. An algorithm of particle motion is developed to push the particles in grids, then the method of matrix permutation based on the RCM algorithm is used to reduce the bandwidth of the matrix. Finally, a simulation example is compared with experiment results to validate this method.