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题名: Large eddy simulation of unsteady shedding behavior in cavitating flows with time-average validation
作者: Li LM(李林敏); Li BK(李宝宽); Hu ZQ(胡志强); Lin Y(林扬); Cheung, Sherman C.P.
作者部门: 海洋信息技术装备中心
通讯作者: Li, Baokuan (libk@smm.neu.edu.cn)
关键词: Unsteady cavitating flows ; Large eddy simulation ; Time-average method ; Periodic shedding
刊名: Ocean Engineering
ISSN号: 0029-8018
出版日期: 2016
卷号: 125, 页码:1-11
收录类别: SCI ; EI
产权排序: 1
项目资助者: State Key Laboratory of Robotics (2014-O01, 2014-Z08, 2013-A05) and the Science and Technology Innovation Foundation of the Chinese Academy of Sciences (CXJJ-14-Z67).
摘要: Cavitation always leads to complex gas–liquid interactions and turbulence structures with multi-scale eddies and vortices. It usually involves cavity growth, break-off and collapse processes; posing great challenges in modeling. This paper focuses on modeling instantaneous cavitating flows using the large eddy simulation (LES) and validating the predictions against experimental data using the time-average method. The volume of fluid (VOF) model was adopted to describe phase equations and coupled with the Schnerr–Sauer cavitation model for describing the evaporation-condensation mass transfer. Simulations were performed to predict the unsteady cavitating flows of both the cylinder and Clark-Y hydrofoil configurations. Firstly, the mechanisms of cavity shedding, vapor cloud forming and collapsing were well revealed. The time-averaged pressure distribution and cavity length around the cylinder were in good agreement with experimental data. Moreover, the periodic cavity shedding and pressure fluctuation around the Clark-Y hydrofoil were also predicted. Different cavity patterns were clearly identified in a typical cycle, and the effect of cavity pattern on hydrodynamic forces was investigated. The computational results of cavity patterns, velocity profiles, drag and lift coefficients were compared with experimental results and good agreements were obtained. The present work provides a valid numerical modeling framework for various cavitating flows.
语种: 英语
WOS记录号: WOS:000384860900001
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.sia.cn/handle/173321/19188
Appears in Collections:海洋信息技术装备中心_期刊论文

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Recommended Citation:
Li LM,Li BK,Hu ZQ,et al. Large eddy simulation of unsteady shedding behavior in cavitating flows with time-average validation[J]. Ocean Engineering,2016,125:1-11.
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