x  CV  CV Q. 5 A 25mm diameter nozzle discharges 0.76m3/minute, when the head is 60m. The diameter of the jet is 22.5mm. Determine the values of Cc, Cv, Cd and loss of head due to fluid resistance (July 2014) Ans: Given Nozzle Diameter D= 25mm, Q = 0.76 m3/min, H = 60m, djet= 22.5mm Values of coefficients  2 d Area of jet 22.52 4 j 2   CC Area of   Nozzle 0.81  4 D D 2 0.01267  C  Qact  0.7522  0.0252    Qth 4 From the relationship Cd = CC × CV  Cv Cd Cc  0.7523  0.928 0.81 Loss of head (HL) due to fluid resistance can be obtained by applying Bernoull’s Equation between the outlet of the nozzle and jet of water p V p V 2 2       Z Z H Eq.1 1 1 2 2 2 2    g g 1 2 L
x CV  CV  Q. 5 A 25mm diameter nozzle discharges 0.76m3/minute, when the head is 60m. The diameter of the jet is 22.5mm. Determine the values of Cc, Cv, Cd and loss of head due to fluid resistance (July 2014) Ans: Given Nozzle Diameter D= 25mm, Q = 0.76 m3/min, H = 60m, djet= 22.5mm Values of coefficients  2 Area of jet d j 4 2 22.52 CC  Area of  Nozzle  4  D 2 D  0.81 C  Qact  Qth  0.01267   0.0252  4  0.7522 From the relationship Cd = CC × CV Cv  Cd Cc  0.7523  0.928 0.81 Loss of head (HL) due to fluid resistance can be obtained by applying Bernoull’s Equation between the outlet of the nozzle and jet of water p V 2 p V 2 1  Z  1  2  Z  2  H Eq.1 1 2  g  2 2  g L
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