单头部模型燃烧室滑动弧等离子体点火数值仿真研究OA北大核心CSTPCD

In order to obtain the characteristics of gliding arc plasma ignition in the combustion chamber of aero-engine,the gliding arc plasma ignition simulation of aero-engine single dome model combustor is studied by numerical simulation.The gliding arc plasma is simplified as a dynamic heat source,gliding arc plasma ignition is compared to electric spark ignition,a rule of temperature distribution and flame evolu-tion in combustion chamber is made by the two ignition methods,and the characteristics of gliding arc plasma ignition are summed up.The calculation results show that the average temperature peaks of the two ignition methods are basically the same.For the gliding arc plasma ignition,when the discharge power is 200 W under conditions of air flow being 25 m3/h,the residual air coefficient is 1,and the ignition delay time is 224.6 ms.When the air coefficient is 2,the ignition delay time is 324.9 ms.And when the residual air coefficient is 4,the ignition delay time is 878.7 ms.In addition,when the discharge power is 200 W under conditions of the air coefficient being 1,and the air flow being 15 m3/h,the ignition delay time is 194.8 ms.When the air flow is 35 m3/h,the ignition delay time is 298.9 ms.