空化
腐蚀
空化侵蚀
转子(电动)
喷射(流体)
风险评估
流量(数学)
计算机模拟
数值分析
涡流
环境科学
岩土工程
风险分析(工程)
机械
地质学
工程类
机械工程
数学
计算机科学
物理
计算机安全
数学分析
古生物学
医学
作者
Mohammad Hossein Arabnejad,Urban Svennberg,Rickard Bensow
出处
期刊:Journal of Fluids Engineering-transactions of The Asme
[ASME International]
日期:2021-10-01
卷期号:144 (5)
被引量:10
摘要
Abstract In this paper, the risk of cavitation erosion is assessed in a commercial water-jet pump using a recently developed numerical erosion assessment method by Arabnejad et al. (2021, “Numerical Assessment of Cavitation Erosion Risk Using Incompressible Simulation of Cavitating Flows,” Wear, 464–465, p. 203529). This assessment is performed for two flow conditions with different cavitation erosion risk according to the experimental paint tests and the high erosion risk areas identified by the method are compared with the experimental results. This comparison shows that the applied method is capable of both identifying the regions of high erosion risk and also capturing the difference between the cavitation erosion risk in the two studied conditions. The latter capability of the numerical assessment method, which has not been reported in the literature for other published methods, is one step forward toward the application of the method in the design process of hydraulic machines. Furthermore, the numerical results are analyzed to explain the reasons for different erosion risk in the two conditions. This analysis reveals that this difference is mostly related to the stronger flow nonuniformities entering the rotor in the most erosive condition. Using the numerical results, one reason behind these stronger nonuniformities is identified to be the stronger bursting of vortices shed from the shaft in the most erosive condition.
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