| 多级中开式离心泵级间过水流道的流场分析 |
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| 引用本文： | 丛小青,张啸,袁丹青,葛嘉军.多级中开式离心泵级间过水流道的流场分析[J].排灌机械工程学报,2015,33(10):840-845. |
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| 作者姓名： | 丛小青 张啸 袁丹青 葛嘉军 |
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| 作者单位： | 1.江苏大学能源与动力工程学院, 江苏 镇江 212013; 2.镇江江大泵业科技有限公司, 江苏 镇江 212013 |
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| 摘 要： | 为了研究多级中开式离心泵级间过水流道的流速、静压及湍动能的分布规律,在设计工况下对多级中开式离心泵级间过水流道进行数值模拟计算.针对导流叶片附近产生的回流及旋涡现象,在原始设计的基础上,通过改变导流叶片的形状及位置,提出3种不同的改进方案.分别对改进方案进行数值模拟计算,分析了3种方案流场的变化并通过积分计算出4种不同级间过水流道的能量损失值,对比分析后确定方案二为最佳方案,并通过试验验证数值模拟计算的准确性.研究结果表明,流体沿级间过水流道流动,在过桥末段的导流叶片处产生回流及旋涡,造成一定的能量损失,从而影响离心泵的性能;可以通过改变前端进口角、后端出口角以达到提高多级中开式离心泵整体性能和效率的目的.
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| 关 键 词： | 多级中开式离心泵 数值模拟 级间过水流道 导流叶片 流场 |
| 收稿时间： | 2014-10-08 |
Flow field analysis of interstage flow channel in a multistage split casing centrifugal pump |
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| Cong Xiaoqing,Zhang Xiao,Yuan Danqing,Ge Jiajun.Flow field analysis of interstage flow channel in a multistage split casing centrifugal pump[J].Journal of Drainage and Irrigation Machinery Engineering,2015,33(10):840-845. |
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| Authors: | Cong Xiaoqing Zhang Xiao Yuan Danqing Ge Jiajun |
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| Institution: | 1.School of Energy and Power Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China; 2.Zhenjiang Great Pump Technolo-gy Co. Ltd., Zhenjiang, Jiangsu 212013, China |
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| Abstract: | In order to study the distribution regularities of flow velocity, static pressure and turbulence energy of the interstage flow channel in the multistage split casing centrifugal pump,numerical simulation calculation was made for the interstage flow channel in the multistage split casing centrifugal pump in the design conditions. Based on the original design of the reflux and swirl generated by the diversion blade, three different improved schemes were proposed by changing the shape and position of the guide vane. Numerical simulation calculation was made for the improved schemes,the flow changes of three kinds of schemes were analyzed and energe loss values of four different interstage flow channels were calculated by integral.After the comparative analysis scheme2 was defined as the best, and the accuracy of numerical simulation calculation was verified by experiment. The results showed that the fluid flows along the interstage flow channel, circumfluence and vortex at guide vane of the bridge terminal caused some energy loss, thereby affecting the performance of the centrifugal pump. Changing the inlet angle of the front end and the outlet angle of the back end aims at improving the overall performance and the efficiency of the multistage split casing centrifugal pump. |
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| Keywords: | multistage split casing centrifugal pump numerical simulation interstage flow channel guide vane flow field |
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