排灌机械工程学报Issue(11)：921-926,6.DOI:10.3969/j.issn.1674-8530.13.6044
基于流固耦合的灯泡贯流泵叶轮强度分析
Strength analysis of bulb tubular pump impeller based on fluid-structure interaction
摘要
Abstract
The RNG k-εturbulence model and SIMPLEC algorithm are used to simulate the steady, three dimensional,internal flow field in a bulb tubular pump with up-and down-stream flow passages. Subsequently,the static stress in the impeller structure is analyzed numerically on ANSYS Workbench by means of sequential coupling method.The results show that the predicted performance curves of the pump are basically in agreement with the measurements.Additionally,the static pressure on the blade pressure side is higher than that on the suction side as a whole,and the low pressure appears on the blade leading edge near the impeller tip,where cavitation may be apt to occur.Impeller strength is mainly affected by centrifugal force and fluid pressure,also the peak equivalent stress and peak total displacement caused from both the centrifugal force and fluid pressure are far less than those generated by each of them.The peak equivalent stress rises with increasing flow rate,but the peak total displace-ment has one minimum at a flow rate.The peak equivalent stress occurs at the blade root near the blade trailing edge.The deformation of the impeller structure becomes more dominated with increasing radius,and the peak deformation appears on the blade tailing edge near the impeller tip.The results show that the impeller strength meets the requirement for operation.The presented results can provide a reference for analysis of stress characteristic of bulb tubular pump impeller.关键词
灯泡贯流泵/数值模拟/顺序流固耦合/结构应力/外特性Key words
bulb tubular pump/numerical simulation/sequential coupling method/structural stresses/external performances分类
农业科技引用本文复制引用
唐学林,王秀叶,贾玉霞..基于流固耦合的灯泡贯流泵叶轮强度分析[J].排灌机械工程学报,2014,(11):921-926,6.基金项目
国家自然科学基金资助项目（51179192，51139007）；新世纪优秀人才支持计划项目（NETC－10－0784）；中央高校基本科研业务费专项资金资助项目 （）
