Turbulent swirling flow in a circular pipe.
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概要
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The decay process of turbulent swirling flow in an axisymmetric circular pipe is analyzed and a method to estimate the tangential mean velocity distribution is proposed. Two basic new factors, viz. the imaginary inlet position of the swirl decay and the friction velocity Uθf for the swirling flow, were defined in order to investigate the distribution of the intensity of swirl Γ. It became clear that there were characteristic functional relationships between the dimensionless radius r+ and the dimensionless intensity of swirl Γ+ in the forced vortex zone and in the quasi-free vortex zone, respectively, where r and Γ were made dimensionless by Uθf. By making use of these relationships between r+ and Γ+ and the exponential decay process of Γ in the axial direction after determination of the values of empirical coefficients, a calculation procedure for tangential mean velocity in a given condition is proposed.
- 公益社団法人 化学工学会の論文
著者
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Ogawa Kohei
Department Of Chemical Engineering Graduate School Of Science And Engineering Tokyo Institute Of Tec
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Kuroda Chiaki
Deparment of Chemistry, Rikkyo University
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ITO SHIRO
Department of Chemical Engineering, Tokyo Institute of Technology
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