円管内過渡流れにおける乱流スラグの挙動

概要

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The generation and propagation of turbulent slugs in a circular pipe were studied under transient flow conditions. The Reynolds number of the final steady state was chosen above the critical Reynolds number of the experimental apparatus. A turbulent slug initiated bout 10 diameters downstream of the entrance, which was preceded by unstable waves with frequency very similar to that of the Tollmien-Schilchting wave. After the passage of the first slug many slugs appeared in the region of x/D ≒ 14 ~ 40, where x is the axial distance and D is the pipe diameter. The axial propagation velocities of the leading and trailing edges of the first slug were determined and compared with those of slugs in steady pipe flows. Velocity distributions inside and outside the slug were discussed.
社団法人日本機械学会の論文
1988-03-25