To determine The irreversible head loss of the valve. Explanation Given: The flow rate of water ( V ˙ ) is 20 L/s The horizontal pipe diameter ( D ) is 3 cm. The pressure drop across the pipe ( P 1 − P 2 ) is 2 kPa. Calculation: Draw the free body diagram of the system as in Figure 1. Write the continuity equation between the inlet and outlet of the value using the relation; A 1 V 1 = A 2 V 2 Here, A 1 is the flow area of the inlet, A 2 is the flow area of the outlet, V 1 is the inlet velocity and V 2 is outlet velocity. Substitute A 1 for A 2 . A 1 V 1 = A 1 V 2 V 1 = V 2 Write the Bernoulli’s equation for the real fluids for the flow across the value as below; P 1 ρ g + V 1 2 2 g + z 1 = P 2 ρ g + V 2 2 2 g + z 2 + h L h L = P 1 ρ g − P 2 ρ g + V 1 2 2 g − V 2 2 2 g + z 1 − z 2 = ( P 1 − P 2 ) ρ g + ( V 1 2 − V 2 2 ) 2 g + ( z 1 − z 2 ) Here, P 1 is the inlet valve pressure. P 2 is outlet value pressure, z 1 is the inlet elevation, z 2 is outlet elevation, h L is head loss, g is acceleration due to gravity and ρ is the water pressure. Substitute 2 kPa for ( P 1 − P 2 ) , 1000 kg/m 3 for ρ , 0 for ( V 1 2 − V 2 2 ) , 0 for ( z 1 − z 2 ) and 9.81 m/s 2 for g . h L = ( P 1 − P 2 ) ρ g + ( V 1 2 − V 2 2 ) 2 g + ( z 1 − z 2 ) = 2 × 10 3 1000 ( 9

5th Edition

ISBN: 9780078027680

Author: Yunus A. Cengel Dr., Robert H. Turner, John M. Cimbala

Publisher: McGraw-Hill Education

See similar textbooks

Concept explainers

Applied Fluid Mechanics

A fluid is a substance that is continuously deformed by the application of shear stress. The rate of deformation of a fluid depends on its viscosity. The fluid tries to flow when it interacts with some other system.

Videos

Question

Chapter 12, Problem 55P

To determine

The irreversible head loss of the valve.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Chapter 12, Problem 54P

Chapter 12, Problem 56P

Chapter 12 Solutions

Fundamentals of Thermal-Fluid Sciences

Ch. 12 - Prob. 1P Ch. 12 - Express the Bernoulli equation in three different...Ch. 12 - What are the three major assumptions used in the...Ch. 12 - Define static, dynamic, and hydrostatic pressure....Ch. 12 - Prob. 5P Ch. 12 - Prob. 6P Ch. 12 - Prob. 7P Ch. 12 - How is the location of the hydraulic grade line...Ch. 12 - Prob. 9P Ch. 12 - Prob. 10P

Ch. 12 - A glass manometer with oil as the working fluid is...Ch. 12 - The velocity of a fluid flowing in a pipe is to be...Ch. 12 - The water level of a tank on a building roof is 20...Ch. 12 - Prob. 14P Ch. 12 - Prob. 15P Ch. 12 - Prob. 16P Ch. 12 - Prob. 17P Ch. 12 - Prob. 18P Ch. 12 - A piezometer and a Pitot tube are tapped into a...Ch. 12 - The diameter of a cylindrical water tank is Do and...Ch. 12 - Prob. 21P Ch. 12 - Prob. 22P Ch. 12 - Prob. 23P Ch. 12 - An airplane is flying at an altitude of 12,000 m....Ch. 12 - While traveling on a dirt road, the bottom of a...Ch. 12 - Prob. 26P Ch. 12 - Prob. 27P Ch. 12 - Air at 105 kPa and 37°C flows upward through a...Ch. 12 - A handheld bicycle pump can be used as an atomizer...Ch. 12 - Prob. 31P Ch. 12 - The water pressure in the mains of a city at a...Ch. 12 - Prob. 33P Ch. 12 - Air is flowing through a venturi meter whose...Ch. 12 - The water level in a tank is 15 m above the...Ch. 12 - What is useful pump head? How is it related to the...Ch. 12 - Prob. 38P Ch. 12 - What is irreversible head loss? How is it related...Ch. 12 - Consider the steady adiabatic flow of an...Ch. 12 - Prob. 41P Ch. 12 - Prob. 42P Ch. 12 - Prob. 43P Ch. 12 - Prob. 44P Ch. 12 - In a hydroelectric power plant, water flows from...Ch. 12 - Reconsider Prob. 12–45E. Determine the flow rate...Ch. 12 - Prob. 47P Ch. 12 - Water is being pumped from a large lake to a...Ch. 12 - A 15-hp (shaft) pump is used to raise water to a...Ch. 12 - Prob. 51P Ch. 12 - The water level in a tank is 20 m above the...Ch. 12 - Prob. 53P Ch. 12 - Prob. 54P Ch. 12 - Water flows at a rate of 20 L/s through a...Ch. 12 - Prob. 56P Ch. 12 - Prob. 57P Ch. 12 - Prob. 58P Ch. 12 - Prob. 59P Ch. 12 - Prob. 60P Ch. 12 - Prob. 61P Ch. 12 - Prob. 62P Ch. 12 - Prob. 63P Ch. 12 - A 73-percent efficient 12-hp pump is pumping water...Ch. 12 - Prob. 65P Ch. 12 - Air flows through a pipe at a rate of 120 L/s. The...Ch. 12 - Air at 100 kPa and 25°C flows in a horizontal duct...Ch. 12 - Prob. 68RQ Ch. 12 - Prob. 69RQ Ch. 12 - Prob. 70RQ Ch. 12 - A 3-m-high large tank is initially filled with...Ch. 12 - Prob. 73RQ Ch. 12 - Prob. 74RQ

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.

Recommended textbooks for you

Elements Of Electromagnetics
Mechanical Engineering
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Oxford University Press
Mechanics of Materials (10th Edition)
Mechanical Engineering
ISBN:9780134319650
Author:Russell C. Hibbeler
Publisher:PEARSON
Thermodynamics: An Engineering Approach
Mechanical Engineering
ISBN:9781259822674
Author:Yunus A. Cengel Dr., Michael A. Boles
Publisher:McGraw-Hill Education
Control Systems Engineering
Mechanical Engineering
ISBN:9781118170519
Author:Norman S. Nise
Publisher:WILEY
Mechanics of Materials (MindTap Course List)
Mechanical Engineering
ISBN:9781337093347
Author:Barry J. Goodno, James M. Gere
Publisher:Cengage Learning
Engineering Mechanics: Statics
Mechanical Engineering
ISBN:9781118807330
Author:James L. Meriam, L. G. Kraige, J. N. Bolton
Publisher:WILEY

Elements Of Electromagnetics

Mechanical Engineering

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Oxford University Press

Mechanics of Materials (10th Edition)

Mechanical Engineering

ISBN:9780134319650

Author:Russell C. Hibbeler

Publisher:PEARSON

Thermodynamics: An Engineering Approach

Mechanical Engineering

ISBN:9781259822674

Author:Yunus A. Cengel Dr., Michael A. Boles

Publisher:McGraw-Hill Education

Control Systems Engineering

Mechanical Engineering

ISBN:9781118170519

Author:Norman S. Nise

Publisher:WILEY

Mechanics of Materials (MindTap Course List)

Mechanical Engineering

ISBN:9781337093347

Author:Barry J. Goodno, James M. Gere

Publisher:Cengage Learning

Engineering Mechanics: Statics

Mechanical Engineering

ISBN:9781118807330

Author:James L. Meriam, L. G. Kraige, J. N. Bolton

Publisher:WILEY

SEE MORE TEXTBOOKS

Fluid Mechanics - Viscosity and Shear Strain Rate in 9 Minutes!; Author: Less Boring Lectures;https://www.youtube.com/watch?v=_0aaRDAdPTY;License: Standard youtube license