江苏水利Issue(2)：11-17,7.
基于熵产理论的大型后置灯泡贯流泵灯泡体水力优化设计
Hydraulic optimization design of bulb body of large rear-mounted tubular pump based on entropy production theory
摘要
Abstract
Large bulb tubular pumps are extensively used in crucial areas such as water transfer projects and flood control,and the issue of flow separation at the tail of the bulb is one of the key factors affecting the stability of the unit's operation.Utilizing sweep optimization and entropy production minimization theories,this study optimizes the length-to-diameter ratio at the tail of large bulb tubular pump devices and thoroughly analyzes the internal hydraulic performance and characteristics of energy loss within the system.The study results show that by optimizing the length-to-diameter ratio at the tail of the bulb body,the head is increased by 4.5%,efficiency is improved by 3%,and flow losses in the bulb section are reduced by 21.7%.Additionally,turbulent entropy generation is predominant in the tail cone section,serving as the principal source of irreversible energy losses in the tubular pump.With the increase in the length-to-diameter ratio,turbulent entropy generation gradually lessens;However,an excessively large length-to-diameter ratio will lead to an increase in wall entropy production,thereby increasing the total entropy production.The vortex area at the tail of the bulb body is a region with concentrated high entropy production;flow separation induces vortex formation,increases turbulent kinetic energy,and causes energy losses.Through the entropy production theory,high-loss areas can be effectively identified and their loss levels can be quantified,providing theoretical support for the hydraulic optimization of large bulb tubular pumps.关键词
贯流泵/熵产/灯泡体/漩涡Key words
tubular pump/entropy production/bulb body/vortex分类
建筑与水利引用本文复制引用
张二峰,潘强,袁寿其,张仁田,黄从兵,张德胜..基于熵产理论的大型后置灯泡贯流泵灯泡体水力优化设计[J].江苏水利,2025,(2):11-17,7.基金项目
江苏省水利科技项目(2021007) （2021007）
