流体机械2012，Vol.40Issue(11)：10-14,5.DOI:10.3969/j.issn.1005-0329.2012.11.003
叶轮口环间隙对离心泵性能影响的模拟和试验
Simulation and Experiment of the Effect of Clearance of Impeller Wear-rings on the Performance of Centrifugal Pump
摘要
Abstract
The effect of clearance of impeller wear-rings on the performance of a centrifugal pump was investigated numerically and experimentally. The whole flow field model including front and back shrouds of pump was designed so as to accurately calculate the head and efficiency of the centrifugal pump. Based on RNG k - e turbulence model, three wear-rings schemes were established , and the effects of clearance of impeller wear-rings on the hydraulic efficiency and mechanical efficiency of the centrifugal pump was analyzed, chiefly from the turbulent kinetic energy, vorticity and radial force angles. According to the results, it can be drawn that the head and total efficiency of the centrifugal pump increase as the clearance value of wear-rings narrows. The following reasons may account for it: the energy dissipation decrease within the impeller; the impact of secondary flow at the inlet of impeller on the mainstream weakens slowly; the eccentric whirl of centrifugal pump is dampened; the front shroud leakage diminishes. Finally, the first wear-ring scheme of impeller is adopted after comprehensive comparison of these three wear-ring schemes, because its efficiency is highest and it satisfies the requirements of the engineering application.关键词
口环间隙/离心泵/湍动能/涡量/径向力Key words
clearance of wear-rings/ centrifugal pump/ turbulent kinetic energy/ vorticity/ radial force分类
机械制造引用本文复制引用
潘中永,陈士星,张大庆,涂琴,李彦军..叶轮口环间隙对离心泵性能影响的模拟和试验[J].流体机械,2012,40(11):10-14,5.基金项目
国家自然科学基金资助项目(50906034,51109096) （50906034,51109096）
江苏高校优势学科建设工程资助项目(苏财教[2011]8号) （苏财教[2011]8号）
