Energy characteristic of cavitation in a centrifugal pump based on entropy generation analysis

IF 1.8 4区 工程技术 Q3 ENGINEERING, MECHANICAL
Houlin Liu, Yanhong Mao, Yong Wang, Xiaolin Wang, Linglin Jiang, Ming Li
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引用次数: 0

Abstract

In this paper, the entropy production method with computational fluid dynamics technology is employed to study the effect of cavitation on the energy characteristics of the centrifugal pump. The modified cavitation model used in the numerical simulation is also verified by visualization experiments. The results show that the energy loss of the pump can be reflected by the entropy production and is the largest in the impeller. Moreover, the cavitation degree could greatly influence the energy loss of the pump. With the decrease in cavitation number, the vortexes and vapor distribution area increase in the impeller, leading to the increase in the total entropy production. The high entropy production region in the blade shifts to the outlet as the cavitation becomes serious.

Abstract Image

基于熵生成分析的离心泵气蚀能量特征
本文采用计算流体动力学技术的熵产生方法,研究了气蚀对离心泵能量特性的影响。数值模拟中使用的修正气蚀模型也通过可视化实验进行了验证。结果表明,泵的能量损失可以通过熵的产生来反映,并且在叶轮中的能量损失最大。此外,汽蚀度对泵的能量损失影响很大。随着空化数的减少,叶轮中的涡流和蒸汽分布面积增大,导致总产熵增大。随着气蚀现象的严重,叶片中的高产熵区会转移到出口处。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
3.60
自引率
13.60%
发文量
536
审稿时长
4.8 months
期刊介绍: The Journal of the Brazilian Society of Mechanical Sciences and Engineering publishes manuscripts on research, development and design related to science and technology in Mechanical Engineering. It is an interdisciplinary journal with interfaces to other branches of Engineering, as well as with Physics and Applied Mathematics. The Journal accepts manuscripts in four different formats: Full Length Articles, Review Articles, Book Reviews and Letters to the Editor. Interfaces with other branches of engineering, along with physics, applied mathematics and more Presents manuscripts on research, development and design related to science and technology in mechanical engineering.
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