水利水电技术（中英文）2025，Vol.56Issue(8)：149-161,13.DOI:10.13928/j.cnki.wrahe.2025.08.011
基于熵产的轴流泵内能量耗散特性分析
Analysis of energy dissipation characteristics in an axial flow pump based on entropy production
摘要
Abstract
[Objective]Axial flow pumps play an important role in flood control and drainage,farmland irrigation,and other fields.The aim is to address the issues of internal flow and energy dissipation characteristics of axial flow pumps under partial load conditions.[Methods]An axial flow pump was selected as the research object.The internal flow,entropy production distribution,and energy dissipation characteristics of the axial flow pump were quantitatively analyzed under 80％,70％,65％,and 60％design flow conditions using numerical simulation and entropy production analysis.[Results]The result showed that the external characteristic calculations obtained from the numerical simulation matched well with the experimental result,with consistent curve trends,indicating that the numerical model and meshes used in the simulation were reasonable and reliable.The energy dissipation in the axial flow pump,from highest to lowest,was ranked as follows:impeller,guide vane,guide vane hub,60-degree bend pipe,outlet pipe,inlet pipe,and water guide cone.Among them,the combined entropy production of the impeller and guide vane accounted for up to 75.93％,mainly due to turbulent dissipation caused by pulsating velocity.As the flow rate decreased,the entropy production in the impeller and guide vane regions increased,and the proportion of entropy production in the impeller increased,especially near the impeller rim.[Conclusion]The result indicate that the high entropy production regions in the impeller are concentrated near the leading edge,rim,and trailing edge on the suction side of the blades,extending from the leading edge to the trailing edge,with the maximum near the impeller rim.Flow separation occurs near the leading edge of the blades,and the recirculation vortex and wake flow on the suction side are the primary factors contributing to high entropy production in these regions.In the guide vane,high entropy production regions are concentrated near the leading edge of the blade inlet,within the flow passage,and near the trailing edge,resulting from flow impact on the blade inlet,passage vortices,and wake flow.As the flow rate decreases,the turbulent dissipation on the suction side at the same impeller cross-section increases,especially near the rim,due to increased flow separation and vortices forming on the suction side at low flow rates.As the flow rate decreases,the turbulent dissipation in the guide vane increases,which is caused by the increase of flow impact,passage vortices,and wake flow near the inlet of the guide vane at low flow rates.The research findings can provide a reference for understanding energy dissipation characteristics and optimizing the hydraulic design of axial flow pumps.关键词
轴流泵/数值模拟/熵产/能量耗散/脉动熵产分布Key words
axial flow pump/numerical simulation/entropy production/energy dissipation/distribution of pulsation entropy production分类
机械制造引用本文复制引用
沈思敏,杨举,黄本胜,钱忠东,刘树锋,杨晨,黄思,王晓蕾,关帅,林钟华..基于熵产的轴流泵内能量耗散特性分析[J].水利水电技术（中英文）,2025,56(8):149-161,13.基金项目
国家自然科学基金项目(52109104) （52109104）
广东省水利科技创新项目(2020-07) （2020-07）
