【最新论文】Omega涡分析方法中核心参数的确定

空化和流体机械研究组2021-01-11 15:40:19
论文概况
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Xiang-rui Dong (董祥瑞), Yi-qian Wang(王义乾), Xiao-ping Chen(陈小平), Yin-lin Dong(董寅林), Yu-ning Zhang(张宇宁,通讯), Chao-qun Liu(刘超群) (2018). Determination of Epsilon for Omega Vortex Identification Method. Journal of Hydrodynamics, 30 (04), 1-8.

DOI: https://doi.org/10.1007/s42241-018-0066-x 

网站链接:

https://link.springer.com/article/10.1007%2Fs42241-018-0066-x

论文要点
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涡广泛存在于各类重要流动现象中,对流体的流动特性和能量耗散起着至关重要的影响。而关于涡的定义及其识别方法一直是流体力学热门的研究领域。本文围绕Omega涡分析方法中的核心参数进行了详细研究,主要学术贡献如下:

(1)提出了Omega涡分析方法中核心参数的表达式并对其进行了详细测试;

(2)本文提出的方法与Q准则等基于阈值的涡识别方法相比,其结果更为客观

(3)采用四个如下经典算例对提出的方法进行了验证:边界层转捩、激波与边界层相互作用、不同雷诺数下的槽道流动


图1 边界层转捩算例图


图2 激波与边界层相互作用算例图


图3 槽道流动(雷诺数为950)



图4 槽道流动(雷诺数为451)



相关论文
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  1. Liu C.*, Wang Y., Yang Y., Duan, Z. (2016). New Omega vortex identification method. Science China Physics, Mechanics and Astronomy, 59(8), 1-9.

  2. Zhang Y.*, Liu, K., Xian, H., and Du, X. (2018). A review of methods for vortex identification in hydroturbines. Renewable and Sustainable Energy Reviews, 81 (Part 1), 1269-1285.

  3. Zhang Y.*, Liu K., Li J., Xian H., and Du, X. (2018). Analysis of the vortices in the inner flow of reversible pump turbine with the new omega vortex identification method. Journal of Hydrodynamics, 30(3), 463-469.

  4. Dong X., Tian S., Liu C.* (2018) Correlation analysis on volume vorticity and vortex in late boundary layer transition. Physics of Fluids, 30(1), 014105.

  5. Wang Y., Yang Y., Yang G., Liu C.* (2017). DNS study on vortex and vorticity in late boundary layer transition. Communications in Computational Physics, 22(2), 441-459.

  6. Bai X., Cheng H., Ji B., Long X. (2018). Large eddy simulation of tip leakage cavitating flow focusing on cavitation-vortex interaction with Cartesian cut-cell mesh method. 2018, 30(4), 750-753. DOI: https://doi.org/10.1007/s42241-018-0068-8



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