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采用三维模型对发动机尾流流场进行数值模拟,获得氢氧火箭发动机水平试车和摇摆试车的尾流流场,以及在摇摆试车工况下,架空钢板的铺设高度、铺设宽度和起始铺设位置对地面热载的影响。计算中,采用氢氧单步燃烧反应模型考虑尾流燃气与空气的燃烧,湍流模型选用了标准k-ε模型。仿真结果表明,合理铺设架空钢板,可以大幅减少试车过程中地面的热载,有效保护地面设施。
The three-dimensional model is used to simulate the wake flow field of the engine, and the wake flow field of the oxyhydrogen rocket engine horizontal test and rocking test is obtained. In the case of rocking test, the laying height, laying width and initial lay position of the overhead steel plate Impact on the ground heat load. In the calculation, the oxy-fuel single-step reaction model was adopted to consider the combustion of the wake gas and the air. The standard k-ε model was adopted for the turbulence model. The simulation results show that the reasonable laying of overhead steel plate can greatly reduce the heat load on the ground during the test run and effectively protect the ground facilities.