Question

Water sprays out of a sprinkler as shown in the picture.

At point 1, the diameter is D1=4in, Q=245 gpm, P1=34 psig.

At point 2 , the diameter of the nozzle is D2=1 in, Flow rate is still Q=245 gpm.

Ignoring the weight of water, calculate:

a) V1 N=AND V2

b) force on the flange @section 1

c) total head loss of elbow and nozzle, hL

1 40° (2)

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Answer #1

Given D = 4 in Q,= 2459pm = 245X231 inp/min 245X231 943.25 ing in3 60 sec 409 [11gpm= 231 ins/min] P, = 34 psig (Gauge pressX @ Force on the Hange @ section 1. Rate of change of linear momentum Forte on x dirhRate of change of linear momentum in med.. - t + 온 국민물 Š Net Force (IR)= VE 2472 111.7 16f Ang @ Total bead loss of elbow and nozzle, be Apply Bernaulles Foun:- 22

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