実験送風機による実験(その3) : グリルの特性およびパンカールーブルの特性に関する研究

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This paper deals with results of tests made on following matters.(1) Discharge from the grille fitted on an air duct.(2) Discharge from the punkah louver fitted on an air duct. As the results of experiments, the empirical formulae for the coefficient of resistance in the streams at the grille and the punkah louver have been obtained.(1) Coefficient of resistance and pressure loss at the grille.(a) In case the grille directly fitted on the duct.ζ'=1.36+0.86/(SM)^2 P=0.86 H_m+1.36 H_G(b) In case the grill fitted on the duct by means of distance piece.ζ'=1.49+0.92/(SM)^2 P=0.92 H_m+1.49 H_G(2) Coefficient of resistance and pressure loss at the punkah louver.(a) In case the tail of punkah louver projects into the duct.ζ'=1.27+1.11/(SM)^2 P=1.11 H_m+1.27 H_D(b) In other case ζ'=1.55+1.27/(SM)^2 P=1.27 H_m+1.55 H_D Where ζ'=coefficient of resistance SM=flow speed ratio P=pressure loss, mmWG H_m=velocity head in the main duct, mmWG H_G=discharging velocity head of the grille, mmWG H_D=discharging velocity head of the punkah louver, mmWG
社団法人日本船舶海洋工学会の論文