Explanation Given information: The temperature of water is 20 ° C , the pressure of the inlet is 20.083 kPa, and the inlet diameter is twenty times the diameter of the throat. Write the expression for the equilibrium equation. P 1 + ρ V 1 2 2 = P 2 + ρ V 2 2 2 ..... (I) Here, the initial pressure is P 1 , the initial velocity is V 1 , the final pressure is P 2 , the final velocity is P 2 , the density of the flowing fluid is ρ . Write the expression for the final velocity. V 2 = V 1 A 1 A 2 ..... (II) Here, the area at inlet is A 1 , and the area at the outlet is A 2 . Calculation: Substitute V 1 A 1 A 2 for V 2 , in Equation (I). P 1 + ρ V 1 2 2 = P 2 + ρ V 1 2 2 A 1 2 A 2 2 V 1 = 2 ( P 1 − P 2 ) ρ ( 1 A 1 2 A 2 2 − 1 ) ..... (III) Substitute 20.083 kPa for P 1 , 2.399 kPa for P 2 , 1 To determine (b) The minimum average inlet velocity at 50 ° C which the cavitations occur in the throat.

4th Edition

ISBN: 9781266016042

Author: CENGEL

Publisher: MCG CUSTOM

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Chapter 2, Problem 157P

To determine

(a)

The minimum average inlet velocity at which the cavitation occur in the throat.

To determine

(b)

The minimum average inlet velocity at 50°C which the cavitations occur in the throat.

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Chapter 2, Problem 156P

Chapter 2, Problem 158P

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(a) The minimum average inlet velocity at which the cavitation occur in the throat.

Solution Summary: The author calculates the minimum average inlet velocity at which the cavitation occur in the throat.