Question

Problem 2: Fire hose (adapted from Cravalho & Smith) The water (p-1000 kg/m3,c 4180 J/kg K) in a fire hose flows steadily at P 106 N/m2 and T-25°C, and approaches the nozzle with negligible kinetic energy. The stream leaving the nozzle is at atmospheric pressure, Pout- 105 N/m2. The nozzle efficiency is 0.95. (a) What is the velocity of the water leaving the nozzle? (b) What is the temperature change of the water as it passes through the nozzle? (c) What is the maximum height of a fire that could be reached by the stream from the fire hose? Answers: a) 41.35 m/s, b) 25.011°C c) 87.2 m

Iam looking for the detailed solutions to this question. Absolute answers are given but Im looking for the step by step solutions with every step clearly explained. Thanks In advance..

Answer 1

Solution C: 4180 |kak G) Applying Bervoulli eruation be twten inlst aund outlet of the nozzle 99 93 JJ 21 2.9 As no change inherht V 2 2

2(10 10 42.426 tooo for the given nozzle, but the nozzle is not idesl ard it has ns of o.gs nezzle 2 Wactual 41,25 m/s | Ang (0) 21 S which

(2S-72)0.95(2S T213)x Jemme nature at eit if it was f'oleal nozzle N ow 2 乙 so, 1.25=24.7951-0.95T2iS Tempers ture chanjt when iz2le is not ideel Ans (b)

K) Manrnu m heart ‘f α h re that could be reached by the v= v2,actual s- hve h're 2 2 41-35 29.81 2