Effect of wavelength of fish-like undulation of a hydrofoil in a free-stream flow
作者: Thekkethil NamshadMukul ShrivastavaAmit AgrawalAtul Sharma
作者单位: 1Indian Institute of Technology Bombay
刊名: Sādhanā, 2017, Vol.42 (4), pp.585-595
来源数据库: Springer Nature Journal
DOI: 10.1007/s12046-017-0619-7
关键词: Fish-like locomotionPitchingUndulationWavelength
英文摘要: Fish-like undulating body was proposed as an efficient propulsion system, and various mechanisms of thrust generation in this type of propulsion are found in the literature—separately for undulating and pitching fishes/foil. The present work proposes a unified study for undulating and pitching foil, by varying wavelength \(\lambda \) (from 0.8 to 8.0) of a wave travelling backwards over the NACA0012 hydrofoil in a free-stream flow; the larger wavelength is shown to lead to the transition from the undulating motion to pitching motion. The effect of wavelength of undulation is studied numerically at a Reynolds number \(Re=4000\) , maximum amplitude of undulation \(A_{max}=0.1\) and non-dimensional frequency of undulation \(St=0.4\) , using level-set immersed-boundary-method based in-house...
原始语种摘要: Fish-like undulating body was proposed as an efficient propulsion system, and various mechanisms of thrust generation in this type of propulsion are found in the literature—separately for undulating and pitching fishes/foil. The present work proposes a unified study for undulating and pitching foil, by varying wavelength \(\lambda \) (from 0.8 to 8.0) of a wave travelling backwards over the NACA0012 hydrofoil in a free-stream flow; the larger wavelength is shown to lead to the transition from the undulating motion to pitching motion. The effect of wavelength of undulation is studied numerically at a Reynolds number \(Re=4000\) , maximum amplitude of undulation \(A_{max}=0.1\) and non-dimensional frequency of undulation \(St=0.4\) , using level-set immersed-boundary-method based in-house...
全文获取路径: Springer Nature  (合作)
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来源刊物:
影响因子:0.393 (2012)

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关键词翻译
关键词翻译
  • undulation 波动
  • undulating 波状的
  • hydrofoil 水翼
  • locomotion 移动
  • wavelength 波长
  • pitching 俯仰
  • coefficient 系数
  • varying 变化的
  • generation 世代
  • propulsion 推进