激光诱导氧气火花演化的数值计算  

Numerical Simulation of Evolution of Laser-Induced Oxygen Spark

作　　者：陈克强[1] 张小波[1] 刘继平[1] 严俊杰[1] 

机构地区：[1]西安交通大学热流科学与工程教育部重点实验室,西安710049

出　　处：《工程热物理学报》2015年第3期646-649,共4页Journal of Engineering Thermophysics

基　　金：国家自然科学基金项目(No.51176147;No.U1261210);国家重点基础研究发展规划项目(No.2009CB219803)

摘　　要：针对激光诱导氧气火花的演化过程,建立了二维轴对称、非定常、多组分计算模型,在流体力学基本方程组的基础上考虑化学反应动力学,并用Fluent软件进行求解,得到了氧气火花在不同时刻的压力和温度分布,分析了氧气火花演化过程中流动传热过程的一些特点,并拟合得到了冲击波半径随时间的变化关系。通过计算结果与文献结果对比,进一步阐明了激光诱导氧气火花演化过程的动理学机理,为激光诱导气体火花点火的应用奠定了基础。In order to understand the process of evolution of laser-induced oxygen spark,a twodimensional axisymmetric,unsteady,multi-component computational model considering the chemical reaction kinetics is built on hydromechanics basic equations,which are solved by Fluent software.Results of pressure and temperature distributions of oxygen spark at different times are gotten and some characteristics are analyzed in the process of evolution.Moreover,the relationship of shock wave radium and time is fitted.Through the comparison of calculated results and literatures,the kinetics mechanism of laser-induced oxygen plasma spark is illustrated further,and the foundation of applications of laser-induced gas ignition is established.

关 键 词：激光 氧气等离子体 火花点火 数值计算 

分 类 号：TN248[电子电信—物理电子学]