补燃循环先进上面级过氧化氢/煤油涡轮泵研制

Development of a peroxide/kerosene turbopump for afterburning cycle for advanced upper stage engine

过氧化氢/煤油涡轮泵用于35 kN补燃循环先进上面级发动机,由过氧化氢泵、煤油泵和涡轮组成,采用涡轮偏置的单轴布局结构。过氧化氢泵为典型的带诱导轮离心泵形式。基于超低比转速及转子动力学方面的考虑,煤油泵采用了部分流泵形式。为了解决轴向力平衡问题并获得较高的效率,涡轮采用了低压比小反力度方案。通过材料与工作介质的相容性研究,总结了一整套可操作性强的过氧化氢泵零件相容性评价准则、选材以及零件钝化处理工艺等技术。对涡轮泵联试和发动机热试车情况进行了分析,并提出了后续研究的重点方向。

Turbopump for a 35 kN-thrust-level peroxide/kerosene advanced upper stage engine with afterbuming cycle has been developed. The whole assembly consists of peroxide pump, kerosene pump, turbopump, and bias turbine mounted on homotaxial. The peroxide pump is a typical centrifugal pump form with an inducer. The kerosene pump adopts the split flow pump due to its low specific speed and corresponding rotor dynamics. The smaller pressure ratio and lower reaction rate are selected in the turbine design to get higher performance and reasonable axial force. Based on the studies of compatibility between materials and working fluid, the compatibility evaluation criteria, material selection and passivation processing were summarized. The results of the turbopump tests and engine hot-fire tests were analyzed, and suggestions on further research were made.