実験用送風機による実験(その2) : 角オリフィスの特性および丸ダクト分岐部分流特性に関する研究

概要

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This paper deals with results of tests made on the following matters.(1) The flow through the rectangular orifice fitted on a rectangular air duct.(2) The divided flow at the tee branch for a circular air duct. As the results of experiments, the following empirical formulae have been obtained (1) Cofficient of resistance at the rectangular orifice.ζ=(A_d/αA_0-1)^2 α=0.625+0.375(A_0/A_d)^3 (2) Loss in the divided flow at the tee branch for a circular air duct.Main duct P=0.05 Hm+0.6 S^2Hm Branch duct P=0.99 Hm+0.341 Hb Where ζ=coefficient of resistance A_0=sectional area of orifice A_d=sectional area of duct P=pressure loss, mmAq H_m=velocity head in the main duct, mmAq H_b=velocity head in the branch duct, mmAq S=flow quantity ratio
社団法人日本船舶海洋工学会の論文