排灌机械工程学报2013，Vol.31Issue(5)：379-383,5.DOI:10.3969/j.issn.1674-8530.2013.05.003
贯流泵内部湍流流动及叶轮流固耦合特性
Turbulent flows in tubular pump and fluid-structure interaction characteristics of impeller
摘要
Abstract
The RNG κ-ε turbulence model and the Ansys Workbench software were used to numerically investigate internal flows in a front-positioned shaft tubular pump and fluid-structure interaction in its impeller.The simulated performances under different operation conditions are consistent with experimental data.Even though the calculated head is higher and the efficiency is lower than the experimental data,their errors are less than 10％.The velocity and pressure of fluid are uniformly distributed in the whole passage of the pump except in the discharge passage.The spiral streamlines in the front of the discharge passage show that the fluid has a residual velocity circulation after it leaves the vaned diffuser.At the design flow rate,a minimum pressure is seen on the suction surface of blade near the blade leading edge,where cavitation will be apt to occur.In addition,a static structural analysis on the impeller was carried out based on one-way fluid-structure coupling method and the stress and deformation of blades were predicted under different operating conditions.The results show that at the design flow rate,there is a maximal equivalent stress on the pressure surface of blade but at the junction of blade and hub.The total deformation of blade increases with radius,and there is a maximum deformation near the impeller tip.The calculated results will provide a reference for optimization design of tubular pumps.关键词
贯流泵/数值模拟/流固耦合/外特性/结构应力Key words
tubular pump / numerical simulation / fluid-structure coupling/ external performances /structural stresses分类
农业科技引用本文复制引用
唐学林,贾玉霞,王福军,周大庆,肖若富,吴玉林,刘竹青..贯流泵内部湍流流动及叶轮流固耦合特性[J].排灌机械工程学报,2013,31(5):379-383,5.基金项目
国家自然科学基金资助项目(50976124,51179192,51139007) （50976124,51179192,51139007）
新世纪优秀人才支持计划项目(NETC-10-0784) （NETC-10-0784）
