复合叶轮相似水力特性的数值模拟与试验验证  

Numerical Simulation and Experimental Verification for Similar Hydraulic Characteristics of Complex Impeller

作　　者：晁文雄 李祥阳[1] 段跟定[1] 刘意 陶毅 杨军杰 沈欢 刘斌斌 CHAO Wenxiong;LI Xiangyang;DUAN Gending;LIU Yi;TAO Yi;YANG Junjie;SHEN Huan;LIU Binbin(Xi'an Aeronautical University,Xi'an Shaanxi 710077,China;Department AECC Xi'an Engine Control Co.,Ltd.,Xi'an Shaanxi 710077,China;Zoomlion Environmental Industry Co.,Ltd.,Changsha Hunan 410100,China)

机构地区：[1]西安航空学院,陕西西安710077 [2]中国航发西安动力控制科技有限公司,陕西西安710077 [3]长沙中联重科环境产业有限公司,湖南长沙410100

出　　处：《机床与液压》2020年第16期58-62,共5页Machine Tool & Hydraulics

基　　金：中国航空发动机集团自主创新专项资金项目(ZZCX-2017-048)。

摘　　要：以比转速相近的某型航天长寿命离心泵为模型泵,基于组合相似换算法、ANSYSY-Fluent软件三维全流场多工况数值模拟和水力特性试验三者相结合的方法设计离心泵,结果表明:设计泵的最大功率点较于模型泵向大流量工况偏移,且功率正斜率较模型泵高。结果表明:设计泵B与模型泵最高效率点均处在1.02倍额定流量工况下,而设计泵B的效率高效区比设计泵更宽,并且高效区较模型泵较平稳,但是在小流量区域模型泵的效率高于设计泵A、B,而且变化斜率不同,设计泵A、B的正斜率大于模型泵,在大流量区域设计泵A、B的效率高于模型泵,在设计泵额定流量的0.76倍处模型泵与设计泵B相交并呈现出不同的变化趋势,且设计泵B的效率正斜率较模型泵高。采用组合相似法放大设计泵在(0.5~1.5)倍额定流量范围内,出口压力、功率随流量变化趋势与模型泵基本一致,效率较模型泵增加明显,设计泵与模型泵满足相似换算准则。With a certain type of long service-life astronautical centrifugal pump that had similar specific speed used as the model pump,a centrifugal pump was designed through integrated methods of the ensemble similarity conversion,three-dimensional whole flow field and multiple load numerical simulation of ANSYSY-Fluent software and hydraulic characteristic test.The results indicate that compared with the model pump,the maximum power point of the engineered pump offsets to large flow conditions and there is higher positive power slope.It also shows that while the peak efficiency points of both the engineered pump B and the model pump are under 1.02 times rated flow conditions,the high-efficiency area of the engineered pump B is wider and more stable than the model pump.However,in the low flow area,the model pump is more efficient than engineered pump A,B;the variation slopes are different:the positive slope of the engineered pump A,B is bigger than the model pump.In the high flow area,the engineered pump A,B are more efficient than the model pump.At 0.76 times rated flow point of the engineered pump,the model pump intersects with the engineered pump B and they present diverse variation trends where the positive efficiency slope of the engineered pump B is higher than the model pump.By magnifying the engineered pump in the range of 0.5~1.5 times rated flow,its exit pressure and power show a consistent variation trend as the model pump,accompanied by evidently increased efficiency.Therefore,the engineered pump and model pump comply with the criteria of similarity conversion.

关 键 词：半开式复合叶轮 相似换算 数值分析 特性试验 性能曲线 

分 类 号：TH3[机械工程—机械制造及自动化] V4[航空宇航科学技术]