Cavitation development and hydrodynamic characteristics around oscillating hydrofoil

被引：0
|
作者：
Yu A. [1 ]
Wang Y. [1 ]
Lei T. [1 ]
机构：
[1] College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing
来源：
Zhendong yu Chongji/Journal of Vibration and Shock | 2022年 / 41卷 / 13期
关键词：
hydrodynamic characteristics; oscillating hydrofoil; reverse jet; unsteady cavitating flow;
D O I：
10.13465/j.cnki.jvs.2022.13.034
中图分类号：
学科分类号：
摘要：
Here, unsteady cavitating flow field around NACA0015 oscillating hydrofoil was numerically simulated by using FBM turbulence model and Zwart cavitation model. The development process of cavitation phenomenon around the hydrofoil under different oscillation conditions and different cavitation numbers was analyzed, and hydrodynamic characteristics and flow field structure changes in hydrofoil oscillation process were analyzed. The results showed that leading edge vortex greatly affects development of sheet cavitation, existence of leading edge vortex can cause reverse jet to appear at cavity trailing edge near airfoil wall side; due to reverse jet, shape and size of sheet cavity can fluctuate in a certain range; under interaction between leading edge vortex and trailing edge vortex, reverse jet moves along airfoil surface to its leading edge, and finally reverse jet makes cavity attached at airfoil' s leading edge be sheared and broken into two parts, and development speed of main part of cavity still attached at the hydrofoil surface be slowed down; separation and shedding of leading-edge vortex and large-scale cavity can cause hydrodynamic curve of oscillating hydrofoil to fluctuate, this is the main factor affecting hydrodynamic characteristics of hydrofoil. © 2022 Chinese Vibration Engineering Society. All rights reserved.
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页码：265 / 274
页数：9
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