本文对千瓦级氩电弧加热发动机内的传热与流动进行了数值模拟研究,获得了典型工况下发动机内温度、速度和马赫数以及发动机喷管温度等参数分布。模拟结果表明,工作气体主要是在阴极下游附近以及约束通道内被加热电离,气体在发动机喷管的上游为亚音速流动,经过约束通道后转变为超音速流动。在进气总压一定时,随着弧电流的增加,发动机出口温度和速度均随之增加,但工作气体流量略有下降。 In this paper, the numerical simulation of the heat transfer and flow in a kilowatt-class argon arc heating engine was carried out. The parameters such as temperature, speed and Mach number and engine nozzle temperature were obtained under typical conditions. The simulation results show that the working gas is heated and ionized mainly in the vicinity of the cathode and in the confinement channel. The gas flows into the sub-sonic stream upstream of the engine nozzle, and then flows into the supersonic flow through the confined channel. When the total inlet pressure is constant, as the arc current increases, the engine outlet temperature and velocity both increase, but the working gas flow rate decreases slightly.