半径流ノズルに関する研究 : 第2報, 内向き流れの理論的解析

概要

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The inward flow characteristics of radial-flow nozzles are studied by the similar procedure to the 1st report. As a parameter, R= Vh^2/vr_2 should be used to calculate velocity distributions in the clearance and pressure losses, etc., where r_2 is the outer radius of a nozzle and V is a radial mean velocity at r_2. When R is over 5.42,boundary layers cannot fill up the clearance, and if R is less than 5.42,the velocity distribution in the clearance becomes perfectly parabolic, that is, Poiseuille's flow will be established. In either case, the thickness of the boundary layer reduces to zero at the center of the nozzle. Therefore, the pressure loss of the nozzle should be expressed by one of the three different equations according to the combination of R and the diameter ratio of the nozzle.
一般社団法人日本機械学会の論文
1962-02-25