F208 THE FLOW OVER AN INCLINED SMALL FENCE IN A TURBULENT BOUNDARY LAYER(Complex turbulent flows)
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概要
- 論文の詳細を見る
The purpose of this paper is to study in detail the flow over an inclined fence in a turbulent boundary layer, as basic research which issues from promoting heat transfer and the decrease of the pressure drop. The fence height h set in a turbulent boundary layer is 3 mm(u_τh/v = 75,u_τ : friction velocity, v : kinematic viscosity) and setting angle of a fence is 20° in the main stream direction. The time-average velocity profiles in the downstream of the fence were measured by using a 3-hole pitot tube. We investigated velocity profiles by utilizing polar diagram, logarithmic velocity distributions and velocity defect law. Consequently, it was found that the spanwise velocity profiles are cross-over profiles. We clarified the relaxation process from stream-wise direction velocity. Further we investigated in detail the flow direction on the wall which shows the wall shear direction by the oil flow visualization.
- 一般社団法人日本機械学会の論文
- 2000-10-01
著者
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Okita Yuji
Anan College Of Technology
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AYUKAWA Kyozo
Ehime University
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Nakamura Katsutaka
Anan College of Technology
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Ichimiya Masashi
University of Tokushima
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Nakase Yoshiyuki
University of Tokushima
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- F208 THE FLOW OVER AN INCLINED SMALL FENCE IN A TURBULENT BOUNDARY LAYER(Complex turbulent flows)
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