流体机械2012，Vol.40Issue(8)：22-26,5.DOI:10.3969/j.issn.1005-0329.2012.08.005
叶片与隔舌干涉对离心泵性能和压力脉动影响的数值研究
Effect of Interaction between Blade and Volute Tongue of Centrifugal Pumps on the Performance and Pressure Pulsation
摘要
Abstract
The three — dimensional unsteady flow field in a centrifugal pump is numerically simulated, where SST k — u> turbulence model is adopted to solve Navier - Stockes equations. The detailed influence from different impeller - volute tongue location to instantaneous pump performance and total pressure pulsation are presented. Pulsation of the static pressure is discussed after u-sing amplitude and time - frequency domain analysis methods. The results show that the instantaneous values of head coefficient and efficiency showing a periodic change highly depend on the interaction between blade and volute tongue, yet the power coefficient is almost invariable. It is a way to improve overall pump performance by improving the lowest instantaneous performance at particular time. Main pressure pulsation source are distributed near the cut - water and blades, especially the strongest fluctuation do not locate at the top of volute tongue, but migrate along with the spiral direction. Blade passing frequency is the main form of the pressure pulsation.关键词
离心泵/干涉/瞬时性能/压力脉动Key words
centrifugal pump interaction/ instantaneous performance/ pressure pulsation分类
机械制造引用本文复制引用
司乔瑞,袁寿其,袁建平,李彤..叶片与隔舌干涉对离心泵性能和压力脉动影响的数值研究[J].流体机械,2012,40(8):22-26,5.基金项目
国家自然科学基金资助项目(50979034) （50979034）
国家杰出青年科学基金资助项目(50825902) （50825902）
