内爆炸后燃烧反应率时间历程理论预估及能量释放常数确定方法  

Method for theoretically predicting time history of afterburning reaction rate of internal explosion and determining energy release constant

作　　者：徐维铮[1,2] 吴卫国[1,2] 况正 Xu Weizheng;Wu Weiguo;Kuang Zheng(Key Laboratory of High Performance Ship Technology of Ministry of Education,Wuhan 430063,China;School of Transportation,Wuhan University of Technology,Wuhan 430063,China)

机构地区：[1]高性能舰船技术教育部重点实验室,湖北武汉430063 [2]武汉理工大学交通学院,湖北武汉430063

出　　处：《中国舰船研究》2019年第4期22-29,共8页Chinese Journal of Ship Research

基　　金：国家自然科学基金资助项目(51409202);装备预研教育部联合基金青年人才项目资助(6141A020331);中央高校基本科研业务费专项资金资助项目(2016-YB-016)

摘　　要：[目的]约束空间内爆炸后燃烧效应涉及复杂的多组分化学反应燃烧过程,采用简化的反应率模型近似描述后燃烧效应具有一定的合理性和工程应用价值。然而,如何预估模型中的反应率时间历程及确定能量释放常数,仍是需要进一步解决的问题。为此,[方法]提出一种后燃烧反应率时间历程的理论预估方法,在此基础上采用化学反应动力学方法确定内爆炸化学反应时间,进而确定能量释放常数。[结果]研究表明:虽然在爆炸初期和爆炸后期理论预估公式与数值计算结果存在一定的差异,但总体趋势吻合较好;按照化学反应动力学分析方法近似确定化学反应结束时刻具有一定的合理性和可靠性。[结论]研究结果可为抗爆结构设计及毁伤评估提供一定的参考和指导。[Objectives]Since the afterburning effect on explosion in confined space involves complex multi-component chemical combustion process, describing the afterburning effect approximately with a simplified reaction rate model has certain rationality and engineering application value. However,it is still required to determine the means of predicting the time history of reaction rate in the model and determine an energy release constant. Therefore[Methods],a theoretical prediction method for the time history of afterburning reaction rate is proposed,and a chemical reaction kinetics method is used to determine the time of chemical reaction in internal explosion so as to determine the energy release constant.[Results] The results show that although there are certain differences between the theoretical prediction and the numerical calculation results in the early and later stages of explosion,the overall trend is in good agreement,and it is reasonable and reliable to approximately determine the final time of chemical reaction according to the chemical reaction kinetics analysis method.[Conclusions]The research results in this paper can provide certain reference and basis for the design of anti-explosion structure and assessment of damage.

关 键 词：约束空间内爆炸 后燃烧效应 反应率模型 五阶WENO格式 化学反应动力学 能量释放常数 

分 类 号：U661.4[交通运输工程—船舶及航道工程]