运载火箭芯级与助推级分离的数值模拟  

Numerical simulation of separation of central stage and booster stage for a carrier rocket

作　　者：张海瑞[1,2] 范晶晶[2] 张为华 

机构地区：[1]国防科技大学航天科学与工程学院,湖南长沙410073 [2]中国运载火箭技术研究院,北京100076

出　　处：《国防科技大学学报》2014年第2期7-12,共6页Journal of National University of Defense Technology

基　　金：国家自然科学基金资助项目(60903206);国家部委资助项目

摘　　要：采用动态重叠网格方法和双欧法,耦合求解非定常流动控制NS方程和6DOF运动方程,数值模拟运载火箭助推级和芯级的自由分离过程和附加外力作用下的强迫分离过程,并对芯级、助推级分离的主要影响因素进行分析。数值结果与试验结果吻合,表明动态重叠网格方法能正确预测火箭芯级与助推级间复杂的流动现象。根据数值模拟结果,给出助推级在不同分离工况下的分离参数及分离规律。The dynamic overset method and Eulerian approach were applied to solve the unsteady NS function and 6DOF movement function, and to numerically simulate the separation processes of KSR- III rocket＇s core and to booster with and without additional forces. Major factors that affect the separation processes were also analyzed. It shows that the numerical results agree with the experimental results,indicating that the dynamic overset assembly method is able to correctly predict the complex flow between the rocket＇s core and booster. Furthermore,based on the results of numerical simulations,separation parameters and rules of the booster under different conditions are also obtained.

关 键 词：运载火箭 分离 动态重叠网格 数值模拟 

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]