Question

A venturi meter was installed in a pipe to measure the flow of the water inside. The inlet diameter of the venturi is 25.4mm and the throat diameter is 12.7mm. Determine the actual flow rate in gpm if the throat Reynolds number is 10^5. The density and viscosity of the fluid is 62.4 Ibm/ft^3 and 3.511kg/m-hr, respectively. The venturi coefficient of discharge is 0.95.( do include unit/s in your answer and use two decimal places)

Answer 1

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(2) 25.4 mm I12.7 mm Throat Coefficient - Cd=0.95 Reynold no. (in Throat) = 105 of dis change Density, B = 62.4 lbm = 1000kg / m3 fts Viscosity, M = 3.51) Kg/mhx = 9.752778104 kg We know PVD Re. No. m-se los Velocity in throut 1000 x V x 12.7x103 9.75277x10-4 Vz=1 V= 7.679 m/s using continuity Eq"- AVI = A 21₂ 4x 25.44* V1 = x 12.72 X7-679 v = 1.92 m/s²

Let, h be the kinetic head difference h = 12²_v. ² ag n=7.679² - 1.922 2x9.81 We know, die charge from Venturi - Actual Dig charge, Pack - Cda, d2 [2gh E = 2.817 Ja, "-02² 2 a = Inlet area = 1000) I c ² = 1 + ( 25.4 91=5.067x164 m² 92= I d = 1.266x10 m² Bact = 0.95 x 5.067x16% 1.266x10" 1279.81X2-817 15.067X164) - (1-266% 104? Pact = 9.2348104 m3/sec Cact = 14.636 g pm