摘要
参照现有液体火箭液氢涡轮泵设计一组诱导轮-离心轮构型。通过数值模拟方法探索液氢涡轮泵中离心轮叶片前缘积叠线的影响规律,验证相应的优化方法。结果表明:泵体流量工况的变化会影响泵体的流场,并对空化现象产生影响;而进行积叠线倾斜优化能调整沿叶高的攻角,进而改善泵体空化性能;积叠线倾斜角θ的取值范围在55°~80°时叶片具有较好的防空化气蚀性能。
A set of inducer-impeller is designed based on an existing liquid hydrogen turbopump.The influence law of the stacking line of the impeller′s blade leading edge is explored through numerical simulation,and the corresponding optimization method is discussed.The results show that the change of flow rate affects the flow field of the pump and the cavitation phenomenon.And an appropriate stacking line can adjust the angle of attack along the blade leading edge,thus preventing cavitation and improving the performance of centrifugal pumps.The impeller will obtain a good anti-cavitation performance when the stacking line incline angleθranges from 55°to 80°.
作者
吴不鸣
夏晨
WU Buming;XIA Chen(College of Energy and Power,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)
出处
《机械制造与自动化》
2023年第4期140-143,共4页
Machine Building & Automation
关键词
液体火箭
涡轮泵
高速泵
空化
液氢
叶轮
liquid-propellant rocket
turbopump
high-speed pump
cavitation
liquid hydrogen
impeller
