密闭空间内爆炸温度场数值计算及其特性研究  

Numerical calculation of explosion temperature field and its characteristics in closed space

作　　者：徐维铮[1,2] 吴卫国[1,2] Xu Weizheng;Wu Weiguo(Key Laboratory of High Performance Ship Technology of Ministry of Education,Wuhan University of Technology,430063,Wuhan,China;Departments of Naval Architecture,Ocean and Structural Engineering,School of Transportation,Wuhan University of Technology,430063,Wuhan,China)

机构地区：[1]武汉理工大学高性能舰船技术教育部重点实验室,武汉430063 [2]武汉理工大学交通学院船舶、海洋与结构工程系,武汉430063

出　　处：《应用力学学报》2020年第1期280-285,I0019,I0020,共8页Chinese Journal of Applied Mechanics

基　　金：国家自然科学基金(51409202;51509196);国防基础研究项目(B1420133057);中央高校基本科研业务费资助(2016-YB-016)

摘　　要：采用三阶WENO有限差分格式,耦合求解爆轰产物质量分数输运方程与可压缩欧拉方程,并通过建立内能与热容之间的关系求得瞬态温度,自主开发密闭空间内炸药爆炸温度场三维数值计算程序。基于所开发的程序开展密闭空间内炸药爆炸温度场数值计算,初步探讨内爆炸温度场演化过程及其分布规律。研究表明:密闭空间内爆炸温度载荷在爆炸初期呈现出多峰值特征,在爆炸后期,逐渐趋近于准静态平稳值,且内爆炸温度场分布具有空间上的不均匀性;数值计算准静态温度与理论计算吻合较好,相对误差控制在1%以内,初步验证了所开发程序的可靠性和正确性。本文的研究可为进一步探讨考虑后燃烧效应爆炸温度场数值计算及毁伤评估提供一定的参考和指导。The third-order WENO finite difference scheme is used to solve the coupled detonation products mass fraction transport equation and compressible Euler equation and the transient temperature is obtained by establishing the relation between internal energy and heat fusion.Then an in-house 3D numerical calculation program of explosion temperature field in closed space is developed.Based on the developed code,the numerical calculation of explosion temperature field in closed cabin is carried out,and the evolution process and distribution characteristics of explosion temperature field are preliminarily discussed.The simulation results indicate that explosion temperature load in closed space is characterized by multiple peaks at the initial stage of explosion,and is gradually close to the quasi-static stationary value at the later stage of explosion.And,the distribution of internal explosion temperature field is not uniform in space.Quasi-static temperature calculated by numerical method is in good agreement with the theoretical calculation,and the relative error is within 1%.The research in the present work providesa reference and guidance for further exploring the temperature field regarding the complex combustion and the evaluation of explosion damage.

关 键 词：密闭空间内爆炸 三阶WENO格式 数值计算 温度场 爆轰产物 准静态温度 

分 类 号：O354.5[理学—流体力学]