排灌机械工程学报2017，Vol.35Issue(1)：25-31,7.DOI:10.3969/j.issn.1674-8530.16.0164
螺旋形蜗壳型式对高比转数离心泵性能的影响
Effects of spiral volute type on performance of high specific speed centrifugal pump
摘要
Abstract
In order to study the internal flow field in two high specific speed centrifugal pumps with different volutes,a pump with logarithmic spiral splitter is designed based on a pump with single loga-rithmic spiral volute.The cross-sectional area and the main parameters of two pumps are identical.A series of numerical simulations are conducted by making use of the SST k-ωturbulence model and ANSYS 14.5 software to obtain the unsteady,three-dimensional and turbulent flows in the centrifugal pumps with single and double volutes under different operational conditions.The performance of the pump with single volute are tested to validate the accuracy of simulations.It is found that the pump with double volute is subject to a better hydraulic efficiency and higher head at high flow rates.Howe-ver,the effect of the splitter on the performance is minor under design and part-load conditions.In ad-dition,the pressure fluctuations in the double volute pump are less than those in the single volute pump,especially at the outlet,suggesting the splitter can damp pressure fluctuations effectively.It can be seen that the flow in the double volute is smoother than that in the single volute based on the stream-line patterns in the diffuser.Compared with the single volute pump,the double volute centrifugal pump can undergo a reduced radial thrust,especially at high flow rates.The results are valuable for the hy-draulic design of high specific speed centrifugal pumps in some degree.关键词
高比转数离心泵/螺旋形双蜗壳/隔板/径向力/数值模拟/压力脉动Key words
high specific speed centrifugal pump/spiral double volute/baffle board/radial force/numerical simulation/pressure fluctuation分类
农业科技引用本文复制引用
张霞,袁寿其,张金凤,黄茜..螺旋形蜗壳型式对高比转数离心泵性能的影响[J].排灌机械工程学报,2017,35(1):25-31,7.基金项目
国家自然科学基金资助项目（51239005，51009072）；江苏高校优势学科建设工程项目 （）
