羽根車の空転損失について

概要

論文の詳細を見る
Measurements of the torque consumed by an impeller rotating in a closed vessel were obtained under the various geometrical configurations by means of a torsion balance technique. The experimental results indicate the following conclusions : (1) When the boss ratio has a value between zero and 0.6,the resisting coefficient takes constant value approximately. (2) The resisting coefficient C_f takes the maximum value for a certain number of blades of the impeller and varys in proportion to (sin θ)^<1/2> (θ≠0) where θ is the attack angle of blades. (3) The relation between the resisting coefficient C_f and Reynolds number R_e in a smooth vessel is given by C_f ∝R_e^<-1/6>. (4) When the width of the impeller is large, the resisting coefficient of the impeller is identical with that of a disc with ribs on both sides of the surfaces. (5) The effect of the number of the blade disappears when the impeller has a shroud and the angle of blade is larger than 45 degrees.
一般社団法人日本機械学会の論文
1963-08-25