Numerical prediction of cavitation erosion risk on hydrofoil based on mass transfer source term

被引：0
|
作者：
Zheng E.-H. [1 ]
Cao Y.-T. [1 ]
Cheng H.-Y. [2 ]
Ji B. [2 ]
Peng X.-X. [1 ]
机构：
[1] National Key Laboratory on Ship Vibration and Noise, China Ship Scientific Research Center, Wuxi
[2] School of Water Resources and Hydropower Engineering, Wuhan University, Wuhan
来源：
Chuan Bo Li Xue/Journal of Ship Mechanics | 2023年 / 27卷 / 01期
关键词：
Cavitation erosion risk; Hydrofoil; Large eddy simulation; Mass transfer source term; Numerical prediction method;
D O I：
10.3969/j.issn.1007-7294.2023.01.003
中图分类号：
学科分类号：
摘要：
As the increase of ship speed and tonnage, as well as the requirements of propulsion efficiency improvement, the occurrence of cavitation is becoming an increasingly common phenomena in ships, so the threat of cavitation erosion has been attracting more and more attention. However, due to the complexity of the cavitation erosion, how to accurately predict the risk of cavitation erosion remains a challenging task. In this paper, an NACA0009 three-dimensional twisted hydrofoil was set as the numerical and experimental model, the unsteady cavitation characteristics of the hydrofoil were numerically simulated by large eddy simulation method and compared with the results of high-speed photography. The results show that the unsteady behavior of cavitation flow is well captured by numerical simulation. Based on the mathematical model of single cavitation collapse, three parameters were proposed to predict cavitation erosion risk: local pressure, local pressure change rate and the cumulative energy of cavitation collapse on the wall. The cavitation erosion risk area and relative cavitation erosion risk intensity could be obtained by thresholds for the three parameters. To avoid the numerical error, the cumulative energy calculation was based on the mass transfer source term. The results show that the predicted cavitation erosion risk area is in good agreement with the experimental results and the area with the most serious cavitation erosion risk is in the sheet cavitation shedding region, which agrees well with the painting test results. © 2023, Editorial Board of Journal of Ship Mechanics. All right reserved.
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页码：23 / 35
页数：12
相关论文
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