ラビリンスパッキンに関する研究 : 第2報, みぞのある同心二重管内の流動損失

概要

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In the present paper, the resistance of flow through the labyrinth packing is experimentally studied, when the clearance is larger than that of 1st report. The feature of flow through the labyrinth is also observed by photographic method. Results obtained are as follows : 1) When the clearance (s) is about 0.1〜0.2 times as large as the groove breadth (B) and the flow is in the state of turbulent, the value of resistance coefficient λ reaches maximum. When the flow is laminar, the value of λ increases with the increase of the clearance and it approaches to the theoretical value calculated for co-axial cylinder without grooves. 2) The value of λ for turbulent flow becomes maximum, when the groove depth is about one-fourth of the groove breadth, but for laminar flow, it is independent of the groove depth. 3) For laminar flow, the value of λ_g・R_e (λ_g : coefficient of resistance in the groove, R_e : Reynolds number) depends only on the value of s/B. 4) By using above results, profile of labyrinth for maximum value of λ is determined.
一般社団法人日本機械学会の論文
1960-11-25