長方形断面曲り管内乱流の研究 : 第3報,助走区間の流れ

概要

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Developing turbulent flows in the entrance region of a rectangular curved duct are experimentally studied, with emphasis being placed on the secondary flow velocity distributions in the skewed boundary layer on the duct end wall. the results obtained are as follows: (1) Secondary flow is at its maximum at a flow turning angle of about 60°; And a turning angle of more than 150 degrees is required for the main flow to reach a fully developed equilibrium state; (2) Similarity of secondary flow velocity distributions is found at any flow-developing stage. The thickness of the secondary flow boundary layer can be defined as 2.5 times the half-width of the maximum secondary flow velocity; (3) Secondary flow velocity distribution and skewed angle distribution can be represented by a modified Mager's model using the thickness of the secondary flow layer.
社団法人日本機械学会の論文
1986-09-25