爆炸性气体爆轰形成机理的数值模拟研究

项目名称： 爆炸性气体爆轰形成机理的数值模拟研究

项目编号： No.11272056

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 数理科学和化学

项目作者： 王成

作者单位： 北京理工大学

项目金额： 90万元

中文摘要： 本项目针对爆炸性气体爆炸灾害预防和防治以及爆轰推进设计的要求，对火焰加速、爆燃转爆轰以及爆轰稳定性进行研究。具体开展如下研究：(1)建立能够准确描述火焰加速和爆燃转爆轰不同阶段能量释放时空特性的混合反应模型；(2)建立考虑粘性扩散和热传导的化学反应流体动力学的控制方程组；(3)构造守恒型高精度保正计算格式，并对其收敛性、稳定性进行相关的验证，研发高精度并行计算程序；(4)研究火焰加速和爆燃转爆轰过程，揭示边界层内的湍流效应对层流火焰加速和爆燃转爆轰的作用机理，建立湍流火焰加速机制、化学不稳定与流动不稳定原理、激波与火焰的作用、湍流输运效应与热点形成的关联机制，揭示不同尺度涡结构下火焰全局特性、内部结构特征以及火焰失稳机理的相互关联机制，确定爆燃转爆轰距离，给出影响爆轰稳定性的因素；本项目的研究可完善气体燃烧与爆轰理论，为可燃气体爆炸灾害的预防和防止以及爆轰推进设计提供重要的科学依据。

中文关键词： 爆轰；爆燃转爆轰；高精度计算；混合反应模型；爆炸性气体

英文摘要： This project investigates flame acceleration， deflagration to detonation transition (DDT) and stability of detonation for prevention of disasters resulting from explosive gas explosion and detonation propulsion design. Detailed research contents are as follows: (1) a composite reaction model that can describe the time-space properties of energy release at different stages of flame acceleration and DDT is established; (2) governing equations considering chemical reaction, thermal conduction and viscosity, including fluid dynamics equations, state equation and mass fraction equation are built; (3) conservative high accuracy and positivity-preserving numerical schemes is constructed, its convergence and stability is tested, and high resolution parallel code is developed; (4) the mechanism of flame acceleration and DDT is investigtaed,the interaction of turbulent effect in boundary layer with laminar flame acceleration and DDT is revealed;the mechanism of turbulent flame acceleration,the mechanism of chemical reaction and flow instability and interaction of shock wave with flame are established; correlation mechanism of turbulent transport effects and formation of hot spot is established; correlation mechanism global and internal structure characteristics of flame under different scale eddies is revealed;the distanc

英文关键词： Detonation；deflagration to detonation Transition；high resolution calculation；composite reaction model；explosive gas