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为详细了解电弧喷射发动机内部工作过程和相关工作参数对其性能的影响,参照实验用发动机的工作参数建立了模型,数值模拟了电弧喷射发动机工作通道内流场和电磁场。利用NND格式求解耦合电磁源项N S方程,Gauss Seidel迭代加超松弛方法求解椭圆型电磁场方程,计算得到的发动机工作通道内流场、电磁场结构,与实验数据进行了对比。结果表明,对同一结构尺寸的发动机,随推进剂流量变化,发动机性能存在最佳值;在一定流量范围内,实验数据和计算结果相符。
In order to understand the influence of internal working process and related working parameters of arcjet engine on its performance, a model was established with reference to the working parameters of the experimental engine. The flow field and electromagnetic field in the working channel of arcjet engine were numerically simulated. The NND equation of coupled electromagnetic energy source was solved by NND scheme. The Gauss Seidel iterative and hyper-relaxation method was used to solve the elliptic electromagnetic field equation. The calculated flow field and electromagnetic field structure were compared with the experimental data. The results show that for the engine with the same structure size, the engine performance has the best value with the change of the propellant flow rate. The experimental data are consistent with the calculated results within a certain flow rate range.