空気マイクロメータ内の流体の作動 : 第4報, 二枚円板形ノズルの特性その2,圧縮性を無視できない場合

概要

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Using the same double-disc nozzles as in the third report, their discharge characteristics as high-pressure type air-micrometer were investigated under the following conditions ; (1) the pressure difference up to 3kg/cm^2 (2) the range of pressure ratio from 0.25 to 0.85 (3) the ratio of gap and inner diameter up to 0.1 The results are summarized as follows : 1. In using double-disc nozzle available for the high-pressure type air-micrometer, there may be two regions owing to pressure ratio, ratio of outer and inner diameters of nozzle, inner diameter itself and gap. In one region the viscous friction is prominent but in the other it is not. 2. Almost satisfactory empirical formulas which express the product of the discharge coefficient and the expansion factor, cε were obtained for these two regions. 3. The trough in the pressure distribution curve shifts outward according as the supply pressure becomes higher and the gap larger.
一般社団法人日本機械学会の論文
1964-02-25