力学学报 ›› 1991, Vol. 23 ›› Issue (5): 513-524.DOI: 10.6052/0459-1879-1991-5-1995-871

• 论文 •    下一篇

均匀、振荡及组合流绕平板流动的尾迹研究

凌国灿;罗才茂   

  1. 中科院力学所,非线性国家重点实验室,100080
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:1991-09-25 发布日期:1991-09-25

STUDY ON NEAR WAKE FLOWS OF A FLAT PLATE IN STEADY, OSCILLATORY AND COMBINED FLOWS

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  1. 中科院力学所,非线性国家重点实验室,100080
  • Received:1900-01-01 Revised:1900-01-01 Online:1991-09-25 Published:1991-09-25

摘要: 本文利用离散涡模型及改进的新生涡产生机制对三种不同来流绕平板的近尾迹进行数值研究。计算讨论了定常流中平板绕流流动的总体特性和近尾迹流场;对于简谐振荡来流,相应于K_c=2.0、4.0 和10.0 分别得到两种不同的尾迹形态。给出了小 K_c 数平板尾迹涡配对、运动的新模式而相应的阻力、惯性力系数计算比以前涡模拟结果更接近于 U 型管实验结果。对于流向组合来流本文模拟了涡锁定及其动力特性并于实验相符,给出了流向扰动对平板绕流流动的影响。

关键词: 涡尾迹, 平板, 振荡流, 流向组合流, 离散涡模拟

Abstract: Numerical simulation of near wake flows of a flat plate in three kindsof oncoming flow is made using discrete vortex model and an improved vorticity creation technique. The gross features and detailed structure, such as velocity profile, turbulent intensities etc., of near wake of the flat plate in uniform oncoming flow are calculated and compared with available previous results. A new vortex mode, describing vortex shedding, pairing and moving in near wake of the plate for harmonic oscillatory oncoming flo...

Key words: near wake, vortex motion, oscillatory flow, in-line combined flow, flat plate, discrete vortex simulation