Numerical simulation of evolution of laser-induced oxygen spark

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.