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A review of cavitation in hydraulic machinery

Journal of hydrodynamics 2016年第3期28卷 335-358页

作者：罗先武季斌 Yoshinobu TSUJIMOTO Beijing Key Laboratory of CO2 Utilization and Reduction Technology Tsinghua University School of Power and Mechanical Engineering Wuhan University Graduate School of Engineering Science Osaka University

This paper mainly summarizes the recent progresses for the cavitation study in the hydraulic machinery including turbo- pumps, hydro turbines, etc.. Especially, the newly developed numerical methods for simulating cavitating turbulent flows and the achievements with regard to the complicated flow features revealed by using advanced optical techniques as well as cavitation simulation are introduced so as to make a better understanding of the cavitating flow mechanism for hydraulic machinery. Since cavitation instabilities are also vital issue and rather harmful for the operation safety of hydro machines, we present the 1-D analysis method, which is identified to be very useful for engineering applications regarding the cavitating flows in inducers, turbine draft tubes, etc. Though both cavitation and hydraulic machinery are extensively discussed in literatures, one should be aware that a few problems still remains and are open for solution, such as the comprehensive understanding of cavitating turbulent flows especially inside hydro turbines, the unneglectable discrepancies between the numerical and experimental data, etc.. To further promote the study of cavitation in hydraulic machinery, some advanced tooics such as a Density-Based solver suitable for highly comoressible cavitating turbulent flows, a virtual cavitation tunnel, etc. are addressed for the future works.

关键词： cavitating turbulent flow numerical simulation turbopump hydro turbine

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