排灌机械工程学报2012，Vol.30Issue(6)：636-640,5.DOI:10.3969/j.issn.1674-8530.2012.06.004
喷水推进混流泵叶片径向力
Radial forces of waterjet propulsion mixed-flow pump
摘要
Abstract
Fluctuations of fluid pressure in hydraulic machinery can cause resonance and fatigue damage of blades. In order to study fluid-induced forces, which are caused by impeller-diffuser interaction, unsteady radial forces due such an effect was conducted in a mixed-flow pump with a vaned dif-fuser by using CFD computation and model experiment. A closed-loop test rig was built for the pump and a co-rotating dynamometer was installed between the impeller and the pump shaft to measure the instantaneous forces and moments on the impeller. The dynamic behavior of the experimental rotor-shaft system was determined by carrying out extensive calibrations. The measured forces at the blade passing frequency showed an unexpected dependency on flow rate. Another important observation was that the blade excitation forces cause the impeller to whirl in the direction opposite to shaft rotation. The computed global characteristics and the magnitude of blade interaction forces showed good agreement with measurements, respectively. The measured results were compared with the unsteady ones estimated by using CFD code-Fluent. Over a large range of flow rates, the trend of force variation agrees well with the measurements. The reasons for deviation of prediction from experiment were explained.关键词
混流泵/喷水推进/径向力/非定常数值模拟/试验Key words
mixed-flow pump/waterjet propulsion/radial force/unsteady numerical simulation/experiment分类
农业科技引用本文复制引用
成立,Bart P.M.van Esch,刘超,周济人,金燕..喷水推进混流泵叶片径向力[J].排灌机械工程学报,2012,30(6):636-640,5.基金项目
国家自然科学基金资助项目(51179167) （51179167）
教育部留学出国人员科研启动基金资助项目(教外司留[2010]1561号) （教外司留[2010]1561号）
江苏省属高校自然科学研究重大项目(12KJA570001) （12KJA570001）
