固体火箭技术2024，Vol.47Issue(4)：537-546,10.DOI:10.7673/j.issn.1006-2793.2024.04.013
基于蒙特卡洛法的喷管中强非均匀性介质辐射换热问题求解加速策略
Accelerated strategy for solving strongly inhomogeneous medium radiation heat transfer problem in the nozzle based on Monte Carlo method
摘要
Abstract
The radiative heat transfer in the solid rocket motor nozzle is non-negligible,and the traditional Monte Carlo method is of low simulation efficiency.Most of the existing acceleration strategies are limited to the cases where the radiative properties span one order of magnitude,which is inconsistent with the characteristics of strong non-uniformity in actual nozzles.Therefore,in the case of radiative properties spanning 2～3 orders of magnitude,the acceleration performance of the Weighted Null-collision Monte Carlo meth-od and the Decomposition Monte Carlo method were compared and investigated based on Null-collision Monte Carlo method.A cubic gray case and a cylindrical non-gray case were analyzed respectively.The results show that both the Weighted Null-collision Monte Carlo method and the Decomposition Monte Carlo method can improve computational efficiency when the null-collision extinction coef-ficient is bigger than 60% of the global maximum,and the radiative properties of control medium is smaller than 3% of the global maximum.Compared with the Decomposition Monte Carlo method,the Weighted Null-collision Monte Carlo method has better acceler-ation performance,with efficiency improvement in non-gray case up to 14% .An improved axisymmetric mesh localization method was proposed,which reduced the computational time more than 43% in several typical cases.关键词
固体火箭发动机/喷管/辐射换热/强非均匀性介质/蒙特卡洛法Key words
solid rocket motor/nozzle/radiative heat transfer/strongly inhomogeneous medium/Monte Carlo method分类
航空航天引用本文复制引用
肖舰,高包海,任亚涛,何明键,齐宏..基于蒙特卡洛法的喷管中强非均匀性介质辐射换热问题求解加速策略[J].固体火箭技术,2024,47(4):537-546,10.基金项目
国家自然科学基金项目(52306079) （52306079）
黑龙江省博士后面上资助项目(LBH-Z22147) （LBH-Z22147）
"新时代龙江优秀硕士、博士学位论文"项目(LJYXL2022-010). （LJYXL2022-010）
