摘要
叶片泵是将机械能向流体能量转换的流体机械,叶轮是其核心过流部件。该文基于正反问题迭代设计方法,开展混流泵叶轮设计研究。速度矩沿轴面流线的分布规律由四次函数给定,通过中点参数和出口斜率控制速度矩,进而分析速度矩分布规律对叶轮性能的影响。结果表明:增大速度矩中点值,会增加叶片进口至叶中位置的载荷,提升叶轮做功能力。速度矩中点值主要影响叶顶附近的相对速度分布和主流区的轴向速度分布。在清华大学流体机械综合试验台开展混流泵能量特性和空化特性测量,结果表明:混流泵高效运行区平坦宽广,最高效率为82.17%,空化比转速为1 289。
Vane pumps convert mechanical energy into fluid energy with the impeller being the key component. This paper designed a flow pump impeller using iterative solutions of direct and inverse problems. The velocity moment distribution along the axial streamline is controlled by a quartic function determined by the midpoint and outlet slope of velocity moment. Analyses of the influence of the velocity moment distribution on the impeller performance show that increasing the midpoint of velocity moment increases the load from the blade inlet to the middle which improves the pump work. The midpoint of velocity moment mainly affects the relative velocity distribution near the blade tip and the axial velocity in the middle of the impeller. The design was evaluated in energy and cavitation experiments. The high-efficiency operating range of the pump is flat and wide with a highest efficiency of 82.17%. The cavitation specific speed is 1 289.
作者
韩亚东
谭磊
刘亚斌
HAN Yadong;TAN Lei;LIU Yabin(State Key Laboratory of Hydroscience and Engineering,Department of Energy and Power Engineering,Tsinghua University,Beijjing 100084,China)
出处
《清华大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2022年第12期1930-1937,共8页
Journal of Tsinghua University(Science and Technology)
基金
国家重点研发计划项目(2020YFB1901401)
水沙科学与水利水电工程国家重点实验室自主科研项目(2021-KY-04)。
关键词
混流泵
叶轮设计
可控载荷
试验研究
数值模拟
mixed-flow pump
impeller design
controllable blade load
experimental investigation
numerical simulation
