...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Ocean Engineering >Numerical and experimental investigation of three-dimensional cavitating flow around the straight NACA2412 hydrofoil
【24h】

Numerical and experimental investigation of three-dimensional cavitating flow around the straight NACA2412 hydrofoil

机译：直NACA2412水翼周围三维空化流的数值和实验研究

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This work deals with the experimental and numerical investigation of unsteady cavitating flow around the straight NACA2412 hydrofoil with the span/chord ratio of 1.25 in the cavitation tunnel. The numerical simulations play the main part in this study; nevertheless the experimental work is also presented as an important background for validation of the results. A comprehensive CFD analysis has been carried out with three advanced turbulence models including the SAS-SST, LES-WALE and DES models. The main attention is focused on the prediction of interactions between the re-entrant flow and cavitation structures as well as the cavitation excited pressure. The monitored pressure fluctuations during the cavity cycles as well as the intervals between the dominant pressure pulses are discussed in detail. To capture side-wall effects, the whole hydrofoil and tunnel test section have been modelled, without any symmetry or periodic boundary conditions. The numerical simulations show, that the dominant frequencies of the cavity oscillation are best predicted by the SAS-SST turbulence model and the Detached Eddy Simulation. The Large Eddy Simulation has provided the best description of vortical structures in the rear part of the hydrofoil but it underestimates the side-wall effects and overestimates the dominant frequencies of the cavity oscillation. (C) 2016 Elsevier Ltd. All rights reserved.
机译：这项工作涉及在空化隧道中跨径比为1.25的直线型NACA2412水翼周围非定常空化流的实验和数值研究。数值模拟是这项研究的主要部分。尽管如此，实验工作也被作为验证结果的重要背景。已经使用三个高级湍流模型（包括SAS-SST，LES-WALE和DES模型）进行了全面的CFD分析。主要注意力集中在折返流和空化结构之间相互作用的预测以及空化激发压力上。详细讨论了在腔周期内监视的压力波动以及主要压力脉冲之间的间隔。为了捕获侧壁效应，对整个水翼和隧道测试段进行了建模，没有任何对称性或周期性边界条件。数值模拟表明，利用SAS-SST湍流模型和Dedched Eddy Simulation可以最好地预测空腔振荡的主频。大涡模拟提供了对水翼后部旋涡结构的最佳描述，但它低估了侧壁效应，并高估了腔体振荡的主导频率。 （C）2016 Elsevier Ltd.保留所有权利。

著录项

  • 来源
    《Ocean Engineering》 |2016年第1期|357-382|共26页
  • 作者

    Sedlar M.; Ji B.; Kratky T.; Rebok T.; Huzlik R.;

  • 作者单位

    Ctr Hydraul Res, Lutin 78349, Czech Republic;

    Wuhan Univ, Sch Power & Mech Engn, Wuhan 430072, Hubei, Peoples R China;

    Ctr Hydraul Res, Lutin 78349, Czech Republic;

    Masaryk Univ, Ctr CERIT SC, Brno 60200, Czech Republic;

    Brno Univ Technol, Fac Elect Engn & Commun, Brno 60200, Czech Republic;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Cavitation; Vortex structures; 3D effects; LES; DES; SAS-SST;

    机译：空化;涡旋结构;3D效应;LES;DES;SAS-SST;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号