电弧喷射推力器电磁场模拟
Modeling of electromagnetic field within arcjet thruster
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摘要: 为了揭示电弧喷射推力器内部电磁场特征及其与高温电离气体间的相互作用机理,建立了比较完善的电磁场模型,详细讨论了电磁场数值模拟方法及其计算效果。模型同时考虑了电场力、洛仑兹力和电子压强梯度对传导电流的贡献,由电子动力学方程和粒子微观碰撞理论推导出电流方程,由麦克斯韦方程组推导出电磁场控制方程,采用包括强隐过程(SIP)迭代法在内的十种迭代方法求解离散的电磁场方程。研究表明,SIP迭代法是适用于电弧喷射推力器电磁场模拟的快速有效的方法,模型能够准确地反映推力器内部电磁场与高温电离气体间的相互作用机理。Abstract: In order to reveal electromagnetic characteristics and interaction between electromagnetic field and high temperature ionized gas within arcjet thruster,improved modeling of electromagnetic field was developed and various numerical techniques were observed and studied.Contributions of electric field force,lorentz force and electronic pressure gradient to conduction current were considered in the model.Electricity equation was derived from electron dynamic equation and particle collision theory.Electromagnetic field equation was simplified from Maxwell's equations.And ten iteration techniques were introduced to solve discretized electromagnetic field equation,including Strong Implicit Procedure(SIP) iteration technique.The investigation shows that SIP iteration technique can be adopted to solve electromagnetic field within arcjet thruster very effectively,and the present modeling can well demonstrate the interaction between electromagnetic field and high temperature ionized gas within it.
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