膨胀循环发动机推力室传热优化

针对膨胀循环发动机推力室身部燃气侧的内壁增强换热结构和冷却剂侧的冷却通道结构这两个影响推力室身部换热最关键的结构分别进行多种结构下的数值模拟对比。通过分析各结构的模拟结果，得到了能够合理提高推力室身部换热能力的内壁加肋结构和圆柱段冷却通道深宽比的结构特征。

Heat transfer optimization of thrust chamber in expansion cycle engine

To further enhance the heat transfer capacity while maintaining the pressure drop of the cooling channels and gas wall temperature in control is one of the key technologies in the design of advanced expander cycle engine. Numerical simulation of inner wall heat transfer enhancement struc- ture at the hot-gas side of thrust chamber and the cooling channel structure at the coolant side was made in this paper. The two structures are the most important ones which affect on the thrust chamber heat transfer. By analyzing the numerical simulation results of each structure, the inner structure with ribs which can enhance the heat transfer capacity of the thrust chamber reasonably and the structure characteristics which can improve depth-to-width ratio of cooling channel at the cylindrical section were obtained.