混合网格重叠方法在多体相对运动中的应用  

A Dynamic Overset Mixed Grids Approach for Multiple Relative Motion

作　　者：康忠良[1] 方媛媛 

机构地区：[1]中国建筑科学研究院建研科技股份有限公司,北京100013 [2]北京市燃气集团研究院,北京100011

出　　处：《土木建筑工程信息技术》2015年第1期69-74,共6页Journal of Information Technology in Civil Engineering and Architecture

基　　金："十二五"国家科技支撑计划(2012BAJ09B04)

摘　　要：本文发展了混合网格的动态重叠方法。基于线性重构方法,给出了一种适用于混合网格间的插值策略。所建立的网格间边界定义方法的性能优秀可靠,网格装配后的插值边界光滑且网格匹配性较好。耦合求解非定常NS方程和刚体6DOF运动方程来模拟多体相对运动问题。外挂物分离问题的数值计算表明,所发展的动网格方法对于处理多体相对运动模拟问题是快速准确可靠的。A dynamic overset mixed grids algorithm is proposed. An interpolation method based on the linear reconstruction is developed for the overset mixedgrids approach. The optimized intergrid-boundary definition method is shown to be excellent and reliable. The intergrid boundaries are very smooth and have similar cell sizes. The flows around multiple bodies in relative motion can be simulated by solving the unsteady Navier-Stokes equations and the 6DOF equations. The numerical results of store separation prove that the present dynamic overset grids method is fast, accurate and reliable.

关 键 词：动网格 重叠网格 混合网格 多体运动 

分 类 号：V211.3[航空宇航科学与技术—航空宇航推进理论与工程]