...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>EPJ Web of Conferences >Numerical identification of blade exit angle effect on the performance for a multistage centrifugal pump impeller
【24h】

Numerical identification of blade exit angle effect on the performance for a multistage centrifugal pump impeller

机译：叶片出口角对多级离心泵叶轮性能影响的数值识别

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Nowadays, single and multistage centrifugal pumps are widely used in industrial and mining enterprises. One of the most important components of a centrifugal pump is the impeller. The performance characteristics are related to the pump comprising the head and the overall efficiency rely a great deal on the impeller geometry. In this work, effects of blade exit angle change on hydraulic efficiency of a multi stage pump impeller are investigated via Ansys-Fluent computational fluid dynamics software for constant width impeller entrance and exit gates, blade numbers and blade thickness. Firstly, the flow volume of a centrifugal pump impeller is generated and then mesh structure is formed for the full impeller flow volume. Secondly, rotational periodic flow model are adopted in order to examine the effect of periodic flow assumption on the performance predictions. Corresponding to the available experimental data, inlet mass flow rate, outlet static pressure and rotation of impeller are taken as 0.02m3s-1, 450 kPa and 2950 rpm, respectively for the water fluid. No slip boundary condition is exposed to all solid of surface in the flow volume. The continuity and Navier-Stokes equations with the k-ε turbulence model and the standard wall functions are used. During the study, numerical analyses are conducted for the blade exit angle values of 18°, 20°, 25°, 30° and 35°. In consequence of the performed analyses, it is determined that hydraulic efficiency of the pump impeller value is changed between 81.0-84.6%. The most convenient blade exit angle that yields 84.6% hydraulic efficiency at is 18°. The obtained results show that the blade exit angle range has an impact on the centrifugal pump performance describing the pump head and the hydraulic efficiency.Key words: Blade exit angle / centrifugal pump / CFD / hydraulic efficiency / impeller / k-ε turbulence model / periodic / analysis
机译：如今，单级和多级离心泵已广泛用于工业和采矿企业。叶轮是离心泵最重要的组件之一。性能特征与包括压头的泵有关，而总效率在很大程度上取决于叶轮的几何形状。在这项工作中，通过Ansys-Fluent计算流体动力学软件研究了叶片出口角度变化对多级泵叶轮水力效率的影响，用于恒定宽度叶轮入口和出口闸门，叶片数量和叶片厚度。首先，产生离心泵叶轮的流量，然后为整个叶轮流量形成网状结构。其次，采用旋转周期性流动模型来检验周期性流动假设对性能预测的影响。与现有的实验数据相对应，水流体的入口质量流量，出口静压力和叶轮转速分别为0.02m3s-1、450 kPa和2950 rpm。没有滑动边界条件暴露于流量中的所有表面实体。使用具有k-ε湍流模型和标准墙函数的连续性和Navier-Stokes方程。在研究过程中，对叶片出口角度分别为18°，20°，25°，30°和35°进行了数值分析。通过执行分析，可以确定泵叶轮的液压效率值在81.0-84.6％之间变化。最方便的叶片出口角在18°时可产生84.6％的液压效率。获得的结果表明叶片出口角范围对描述泵头和液压效率的离心泵性能有影响。关键词：叶片出口角/离心泵/ CFD /液压效率/叶轮/k-ε湍流模型/定期/分析

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号