人民长江2025，Vol.56Issue(4)：162-168,185,8.DOI:10.16232/j.cnki.1001-4179.2025.04.022
出口扩散段直径对双向流道泵装置水力性能的影响
Influence of outlet diffusion section diameter on hydraulic performance of bidirectional flow channel pump device
摘要
Abstract
In order to improve the hydraulic performance of large-scale low-lift bidirectional flow channel pumps,based on the elliptical profile design of the outlet diffusion section of the flow channel,combined with the SST k-ω turbulence model,the influence of the diameter parameters of the outlet diffusion section on the hydraulic performance of a bidirectional flow channel pump was discussed.By adjusting the maximum diameter D1 of the horn tube of the outlet conduit,the maximum diameter D2 of the water guide cone respectively,and adjusting both at the same time,the distribution rules of the flow velocity uniformity,hy-draulic loss and kinetic energy recovery rate of the outlet conduit under different diameter schemes were compared.Combined with the entropy generation theory,the influence of outlet diffusion section diameter on the hydraulic performance of the bidirectional flow channel pump was revealed.The results showed that when only the maximum diameter of the horn tube D1 increased,the maximum efficiency of the pump device increased first and then decreased.When D1=2.09D0(impeller diameter of the pump device),the efficiency of the pump device was the highest,and the hydraulic loss of the outlet channel was reduced by 1cm com-pared with the initial scheme.When only the maximum diameter of the water guide cone D2 increased,the hydraulic loss of the outlet passage decreased first and then increased.When D2=2.09D0,the hydraulic loss of the outlet passage was the smallest.When D1 and D2 increased at the same time,the maximum efficiency of the pump device gradually increased,and the maximum efficiency of the pump device gradually increased at D1=D2=2.2D0,and the hydraulic loss of the outlet channel was reduced by 1.8cm compared with the initial scheme.The research results can provide reference for the optimal design of the bidirectional flow channel pump device.关键词
出口扩散段/喇叭管/导水锥/双向流道泵/水力性能Key words
outlet diffusion section/horn tube/water guide cone/bidirectional flow channel/hydraulic performance分类
机械制造引用本文复制引用
陶贤明,刘红伟,陈运杰,张瑾,李彦军,李亚林..出口扩散段直径对双向流道泵装置水力性能的影响[J].人民长江,2025,56(4):162-168,185,8.基金项目
江苏省水利科技项目(2022018) （2022018）
国家自然科学基金青年项目(51809120) （51809120）
