架空钢板对火箭发动机试车中地面热载的影响

摘要

The wake’s flow fields of the hydrogen-oxygen rocket engine in the level tests and the swing tests were simulated numerically with the 3-D model. The influences of the aerial steel plate’s aerial height, aerial width and original paving position on the ground heat load were obtained. The single-step H-O reaction model was used for the reactions between the wake gas and air, and the standard k-εturbulence model was selected in the simulations. The numerical results showed that by paving the aerial steel plate right, the ground heat load can be reduced remarkably, and the ground facilities can be protected effectively.%　　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。