排灌机械工程学报2025，Vol.43Issue(5)：455-462,8.DOI:10.3969/j.issn.1674-8530.23.0080
来流条件对灯泡贯流泵装置水力性能的影响
Effects of inflow conditions on hydraulic performance of bulb tubular pump system
摘要
Abstract
In order to study the effect of flow conditions on the hydraulic performance of bulb pump systems,computational fluid dynamics methods were used to numerically calculate the unsteady flow characteristics inside bulb pumps under uniform and non-uniform flow conditions.The velocity distribu-tion data were extracted from the outlet section of the inlet passage in the pump station as the non-uni-form inflow conditions of the model pump,and the uniform inflow was compared.Based on the N-S equation and SST turbulence model,the unsteady flow behavior under multiple working conditions in the bulb tubular pump was simulated.The hydraulic losses and flow fields characteristics of the model pump system under different inflow conditions were analyzed by using the method of entropy generation and pressure fluctuation.The results show that the given non-uniform inflow conditions will cause non-uniformity flow in the impeller and diffuser domains,reducing the hydraulic performance of the pump systems.Based on the comparative analysis of total pressure loss and entropy production loss,it is found that the entropy production analysis method can evaluate the hydraulic performance of flow com-ponents.The energy loss mainly cover turbulent entropy production and wall entropy production.The effect of single grid volume on the local power loss area were visualized and quantified with entropy pro-duction theory.Through the pressure pulsation characteristics analysis,it is found that the non-uniform inflow conditions does not change the original amplitude frequency characteristics of the cross flow pump systems,but it will increase the fluctuation amplitude,which is not conducive to the stable operation of the pump device systems.关键词
灯泡贯流泵/非均匀来流/熵产理论/压力脉动/数值计算Key words
bulb tubular pump/non-uniform inflow/entropy production theory/pressure fluctuation/numerical simulation分类
农业工程引用本文复制引用
孙龙月,孙猛,潘强,张德胜..来流条件对灯泡贯流泵装置水力性能的影响[J].排灌机械工程学报,2025,43(5):455-462,8.基金项目
国家自然科学基金资助项目(52209111) （52209111）
江苏省自然科学基金资助项目(BK20220542) （BK20220542）
江苏省水利科技项目(2021007) （2021007）
江苏省研究生创新计划项目(KYCX21_3356) （KYCX21_3356）
