Water enters a turbine at 900 kPa with negligible velocity. What
| Water enters a turbine at 900 kPa with negligible velocity. What maximum speed, in m/s, can it reach before it enters the turbine rotor?
A. 42
B. 47
C. 45
D. 52
Please scroll down to see the correct answer and solution guide.
Right Answer is: A
SOLUTION
Concept:
Maximum speed if whole pressure energy head converted to kinetic energy head,
i.e. PE = KE ⇒ \(\frac{P}{ρ g}=\frac{V^2}{2g}\)
Calculation:
Given:
P = 900 kPa, ρ = 1000 kg/m3
\(⇒ V = \sqrt {\frac{{2P}}{ρ }} = \sqrt {\frac{{2 \times 900 \times {{10}^3}}}{{1000}}} \)
V = 42.4 m/s