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Numerical Study on Cavitation Phenomenon in an In-Line Centrifugal Pump
参考中译:直列式离心泵内汽蚀现象的数值研究


          

刊名：International review of mechanical engineering
作者：Md Rakibuzzaman（Department of Mechanical Engineering, International University of Business Agriculture and Technology-IUBAT）
Sang-Ho Suh（School of Mechanical Engineering, Soongsil University）
A. K. M. Parvez Iqbal（Department of Mechanical Engineering, International University of Business Agriculture and Technology-IUBAT）
Hyoung-Ho Kim（School of Mechanical Material Convergence Engineering, Gyeongsang National University）
刊号：780MC007
ISSN：1970-8734
出版年：2022
年卷期：2022, vol.16, no.3
页码：110-117
总页数：8
分类号：TH
关键词：Cavitation；Cavitation model；Computational fluid dynamics；Flow behaviour；In-Line centrifugal pump
参考中译：汽蚀；汽蚀模型；计算流体力学；流动特性；直列式离心泵
语种：eng
文摘：Cavitation in pumps causes unwanted consequences, such as noise, vibrations, and system oscillations. These result in reduced pump efficiency and unstable operation range. Therefore, this study investigates the cavitation behaviours of newly designed centrifugal pumps experimentally and numerically. Computational Fluid Dynamics (CFD) was used to analyse cavitation flow behaviours. The Rayleigh-Plesset expression for bubble dynamics was employed to capture the cavitation phenomenon inside the pump. Numerical simulations were performed and validated by experiments, and good performance characteristics were obtained. The estimated total head drop lines for different cavitation flow rates and performances were analysed numerically. Cavitation was observed near the impeller blade suction for the leading-edge condition in impeller flow passage; moreover, a lower pressure was observed near the impeller blade shroud than the hub in the steady-state condition.
参考中译：泵中的汽蚀会导致不必要的后果，如噪音、振动和系统振荡。这导致泵的效率降低，运行范围不稳定。因此，本研究对新设计的离心泵的汽蚀行为进行了实验和数值研究。利用计算流体力学(CFD)对空化流动行为进行了分析。气泡动力学的Rayleigh-Plesset表达式被用来捕捉泵内的空化现象。进行了数值模拟并进行了实验验证，获得了良好的性能特性。数值分析了不同空化流量和性能下的估算总水头降线。在叶轮流道的前缘状态下，叶轮叶片吸力附近观察到空化现象，并且在稳态状态下，叶轮叶冠附近的压力低于轮毂附近的压力。



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