Analysis of Turbulent Structure of an impulsively Started Jet by Applying Image Processing

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概要

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• An image processing method for the analysis of a turbulent structure was devised. It was applied to an impulsively started axisymmetrical jet growing into an otherwise quiescent fluid. The development of the statistical average contour and the growing behaviour of the jet were clarified. Simultaneous measurements of the concentration and the velocity at a fixed position were carried out and the transient phenomenon at the position was made clear. By comparing the results of the two methods, the average behaviour and the characteristics of the turbulence of the jet were revealed. It is confirmed that the image processing method developed here is effective for the analysis of the spatial structure of turbulence in an unsteady flow field.

• 一般社団法人日本機械学会の論文

著者

• Kawase Hiroyuki

  Nihon Gaishi

• Shirakashi Masataka

  Technological University Of Nagaoka

• Wakiya Shoichi

  Technological University Of Nagaoka

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