曲がりディフューザ内の流れに関する実験的研究 : 一様な入口速度分布をもったディフューザ内の案内羽根前縁位置の影響

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This paper deals with an experimental study of the flow in a logarithmic spiral curved diffuser with uniform inlet velocity distribution. In this study, the effects of the variation in the interposed position of the guide vane in a diffuser and the position of its leading edge on the pressure distributions along both diffuser walls, velocity and vector distributions, and the diffuser efficiency are clarified. The results obtained from this study are summarized as follows : In the case where the ratio, b_n/B_1, of the distance b_n between the convex wall and the interposed position of the guide vane at the diffuser inlet to the diffuser inlet breadth B_1 is in the region of about 0.25〜0.375, the diffuser efficiency indicates the most desirable value. When the leading edge of the guide vane is placed upstream, superior diffuser efficiency can be obtained, in every interposed position of a guide vane.
社団法人日本機械学会の論文
1992-11-25