Fluid Mechanics: Fundamentals and Applications
4th Edition
ISBN: 9781259696534
Author: Yunus A. Cengel Dr., John M. Cimbala
Publisher: McGraw-Hill Education
expand_more
expand_more
format_list_bulleted
Concept explainers
Textbook Question
Chapter 14, Problem 14CP
Consider flow through a water pump. For each statement, choose whether the statement is twe or false, and discuss your answer briefly:
(a) The faster the flow through the pump. the more likely that cavitation will occur.
(b) As water temperature increases. NPSHrequired also increases.
(c) As water temperature increases, the available NPSH also increases.
(d) As water temperature increases, cavitation is less likely to occur.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
2.
A storage contains liquid at depth y where y-0 when the tank is half full, as
shown below. Liquid is withdrawn at a constant flow rate Q to meet demands. The
contents are resupplied at a sinusoidal rate 3Qsin2(t). The storage tank has a diameter
D=5m.
a. Beginning from conservation of mass, formulate an equation for the change in
dV
TD2
depth of water as a function of time. Hint:
dt
din - 9out and V =
4
b. Use Euler's method to solve for the depth y, show the iterative equation for the
Euler's method, and use Q=5 m3/s to complete the table below:
t (s)
y (m)
0.5
1.0
find
Step 1: Known, UnknownStep 2: SchematicStep 3: FormulaStep 4: CalculationsStep 5: Discussion
A 30 cm diameter pipe, conveying water, branches into two pipes of diameters20 cm and 15 cmrespectively. If the average velocity in the 30 cm diameter pipe is 2.5 m/s, find the discharge inthis pipe (m3/s). Also determine the velocity (m/s) in 15 cm pipe if the average velocity in 20cm diameter pipe is 2 m/s.
Answer with True or False of the following question:
(7M
1. Water flows steadily down a vertical pipe of constant cross section. Neglecting friction, according
to Bernoulli's equation, velocity decreases with height.
2. A liquid in an open right circular cylinder is given rigid body rotation about the axis of the
cylinder. The pressure distribution in any vertical plane is uniform.
3. A curved surface is submerged in a static liquid. The horizontal component of pressure force on it
is equal to the pressure force on a vertical projection of the surface.
4. A U-tube manometer measures the difference in total energy between two points.
Chapter 14 Solutions
Fluid Mechanics: Fundamentals and Applications
Ch. 14 - What is the more common term for an...Ch. 14 - What the primary differences between fans,...Ch. 14 - List at least two common examples of fans, of...Ch. 14 - Discuss the primary difference between a porn...Ch. 14 - Explain why there is an “extra” term in the...Ch. 14 - For a turbine, discuss the difference between...Ch. 14 - Prob. 7CPCh. 14 - Prob. 8PCh. 14 - Prob. 9PCh. 14 - Prob. 10CP
Ch. 14 - There are three main categories of dynamic pumps....Ch. 14 - For each statement about cow cetrifugal the...Ch. 14 - Prob. 13CPCh. 14 - Consider flow through a water pump. For each...Ch. 14 - Write the equation that defines actual (available)...Ch. 14 - Consider a typical centrifugal liquid pump. For...Ch. 14 - Prob. 17CPCh. 14 - Consider steady, incompressible flow through two...Ch. 14 - Prob. 19CPCh. 14 - Prob. 20PCh. 14 - Suppose the pump of Fig. P1 4-19C is situated...Ch. 14 - Prob. 22PCh. 14 - Prob. 23EPCh. 14 - Consider the flow system sketched in Fig. PI 4-24....Ch. 14 - Prob. 25PCh. 14 - Repeat Prob. 14-25, but with a rough pipe-pipe...Ch. 14 - Consider the piping system of Fig. P14—24. with...Ch. 14 - The performance data for a centrifugal water pump...Ch. 14 - For the centrifugal water pump of Prob. 14-29,...Ch. 14 - Suppose the pump of Probs. 14-29 and 14-30 is used...Ch. 14 - Suppose you are looking into purchasing a water...Ch. 14 - The performance data of a water pump follow the...Ch. 14 - For the application at hand, the flow rate of...Ch. 14 - A water pump is used to pump water from one large...Ch. 14 - For the pump and piping system of Prob. 14-35E,...Ch. 14 - A water pump is used to pump water from one large...Ch. 14 - Suppose that the free surface of the inlet...Ch. 14 - Calculate the volume flow rate between the...Ch. 14 - Comparing the results of Probs. 14-39 and 14-43,...Ch. 14 - Prob. 45PCh. 14 - The performance data for a centrifugal water pump...Ch. 14 - Transform each column of the pump performance data...Ch. 14 - 14-51 A local ventilation system (a hood and duct...Ch. 14 - Prob. 52PCh. 14 - Repeat Prob. 14-51, ignoring all minor losses. How...Ch. 14 - Suppose the one- way of Fig. P14-51 malfunctions...Ch. 14 - A local ventilation system (a hood and duct...Ch. 14 - For the duct system and fan of Prob. 14-55E,...Ch. 14 - Repeat Prob. 14-55E, ignoring all minor losses....Ch. 14 - A self-priming centrifugal pump is used to pump...Ch. 14 - Repeat Prob. 14-60. but at a water temperature of...Ch. 14 - Repeat Prob. 14-60, but with the pipe diameter...Ch. 14 - Prob. 63EPCh. 14 - Prob. 64EPCh. 14 - Prob. 66PCh. 14 - Prob. 67PCh. 14 - Prob. 68PCh. 14 - Prob. 69PCh. 14 - Two water pumps are arranged in Series. The...Ch. 14 - The same two water pumps of Prob. 14-70 are...Ch. 14 - Prob. 72CPCh. 14 - Name and briefly describe the differences between...Ch. 14 - Discuss the meaning of reverse swirl in reaction...Ch. 14 - Prob. 75CPCh. 14 - Prob. 76CPCh. 14 - Prob. 77PCh. 14 - Prob. 78PCh. 14 - Prob. 79PCh. 14 - Prob. 80PCh. 14 - Wind ( =1.204kg/m3 ) blows through a HAWT wind...Ch. 14 - Prob. 82PCh. 14 - Prob. 84CPCh. 14 - A Francis radial-flow hydroturbine has the...Ch. 14 - Prob. 87PCh. 14 - Prob. 88PCh. 14 - Prob. 89PCh. 14 - Prob. 90CPCh. 14 - Prob. 91CPCh. 14 - Discuss which dimensionless pump performance...Ch. 14 - Prob. 93CPCh. 14 - Prob. 94PCh. 14 - Prob. 95PCh. 14 - Prob. 96PCh. 14 - Prob. 97PCh. 14 - Prob. 98PCh. 14 - Prob. 99PCh. 14 - Prob. 100EPCh. 14 - Prob. 101PCh. 14 - Calculate the pump specific speed of the pump of...Ch. 14 - Prob. 103PCh. 14 - Prob. 104PCh. 14 - Prob. 105PCh. 14 - Prob. 106PCh. 14 - Prob. 107EPCh. 14 - Prob. 108PCh. 14 - Prob. 109PCh. 14 - Prob. 110PCh. 14 - Prove that the model turbine (Prob. 14-109) and...Ch. 14 - Prob. 112PCh. 14 - Prob. 113PCh. 14 - Prob. 114PCh. 14 - Prob. 115CPCh. 14 - Prob. 116CPCh. 14 - Prob. 117CPCh. 14 - Prob. 118PCh. 14 - For two dynamically similar pumps, manipulate the...Ch. 14 - Prob. 120PCh. 14 - Prob. 121PCh. 14 - Prob. 122PCh. 14 - Calculate and compare the turbine specific speed...Ch. 14 - Prob. 124PCh. 14 - Prob. 125PCh. 14 - Prob. 126PCh. 14 - Prob. 127PCh. 14 - Prob. 128PCh. 14 - Prob. 129PCh. 14 - Prob. 130PCh. 14 - Prob. 131PCh. 14 - Prob. 132PCh. 14 - Prob. 133PCh. 14 - Prob. 134PCh. 14 - Prob. 135PCh. 14 - A two-lobe rotary positive-displacement pump moves...Ch. 14 - Prob. 137PCh. 14 - Prob. 138PCh. 14 - Prob. 139PCh. 14 - Prob. 140PCh. 14 - Which choice is correct for the comparison of the...Ch. 14 - Prob. 142PCh. 14 - In a hydroelectric power plant, water flows...Ch. 14 - Prob. 144PCh. 14 - Prob. 145PCh. 14 - Prob. 146PCh. 14 - Prob. 147PCh. 14 - Prob. 148PCh. 14 - Prob. 149PCh. 14 - Prob. 150PCh. 14 - Prob. 151P
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.Similar questions
- I need help calculating these values using the defined quantites: Fin using the given values (remember its units are m3/hour) the mass flux of water of the inlet stream E from the given values (make sure that it is in the correct units!) Vp= Volume of pond ** For this question, assume that Fin, Fout, and E do not change over time, and that Vp is at steady state Quantities: Pond geometry: r = 100 m; h = 8 m. cin = 0.5 g/m3 (constant over time); ci = 0.01 g/m3 Fin: The inlet stream can be approximated as rectangular in cross-section, with width w = 3 m and depth d = 1 m, and an average velocity uin = 0.5 m/s. E: The evaporation rate can be determined from the evaporative volume flux of 0.1 mm/hour.arrow_forwardA piping system has water operating at 50 °C. Which of the statements below is true for the system to avoid cavitation bubbles? Saturation (or vapor) pressure of water at various temperatures Saturation Temperature T, °C Pressure Pat, kPa -10 -5 0.260 0.403 0.611 0.872 10 1.23 15 1.71 20 2.34 3.17 4.25 25 30 40 7.38 12.35 101.3 (1 atm) 50 100 150 475.8 200 1554 250 3973 300 8581 Pressure greater than 12.35 kPa O Pressure greater than or equal to 12.35 kPa O Pressure equal to or less than 12.35 kPa O Maintain pressure at 12.35 kPa O Pressure less than 12.35 kPaarrow_forwardLiquid biofuel (density= 789 kg/m3) is being pumped from a storage tank through a pipe with 1-inch innerdiameter (ID). The fuel is being pumped at a rate of 3.00 gallons per minute. In this process, what is thekinetic energy transport rate (Ėk) in units of horsepower (hp) and ft•lbf/sec.arrow_forward
- An inverted right circular conical tank loses water out of a 4-in hole at the bottom. The radius of the top of the tank is 8 ft and its total height is 20 ft. Assume that the coefficient of contraction is 0.6. Match each item to a choice: Solve for dV/dt. Solve for dh/dt. Choices: -5 -8 -0.6196Vh -0.4189/h -8 6h2.5 3h1.5 3h2.5 -5 -0.7255 h -0.2156Vh 6h1.5arrow_forwardFor each statement, choose whether the statement is true or false, and discuss your answer briefly: (a) If the rpm of a pump is doubled, all else staying the same, the capacity of the pump goes up by a factor of about 2. (b) If the rpm of a pump is doubled, all else staying the same, the net head of the pump goes up by a factor of about 2. (c) If the rpm of a pump is doubled, all else staying the same, the required shaft power goes up by a factor of about 4. (d) If the rpm of a turbine is doubled, all else staying the same, the output shaft power of the turbine goes up by a factor of about 8.arrow_forwardA storage tank, 26 ft in diameter and 36 ft high, is fi lledwith SAE 30W oil at 20 ° C. ( a ) What is the gage pressure,in lbf/in 2 , at the bottom of the tank? ( b ) How does your resultin ( a ) change if the tank diameter is reduced to 15 ft?( c ) Repeat ( a ) if leakage has caused a layer of 5 ft of waterto rest at the bottom of the (full) tank.arrow_forward
- Directions: In any clean sheet of paper, write your name, solve the problem and show your solution. Box your final answer. Take a picture of it and upload it here (image/pdf). 1) Between two sections in a vessel, a fluid moves in a steady flow manner. At entrance: A1=20 m2, P1=1300 kgm/m3. At exit: A2-10 m2, 02=0.00125 m /kg, Ü2=3 m/min. Determine the following: a) m, in kg/min b) Ủz in m/minarrow_forward1. In the benzene plant, the pressure drop at some point of a pipeline in which benzene is passing through is measured with a U-tube manometer (Rm,1) as 10 cm (1st situation). The manometer fluid is carbon tetrachloride (CC14). Then, in order to avoid CC14 poisoning, it is decided to add a layer of water to both arms of manometer (2nd situation). So, 4 cm of water is added to the left arm and 8 cm of water is added to right arm. In this new situation, what will be the height difference of manometer fluid (CC14) between the arms of the manometer (Rm,2)? Data: pbenzene=876 kg/m³, pwater=997 kg/m², pccCI4=1587 kg/m³ Benzene Flow Benzene Flow "wright=8cm Rm,1 Rm2 =4cm[ 1 st Situation: Before adding water to manometer's arms 2 nd Situation: After adding water to manometer's armsarrow_forwardWater flows through a Venturi meter, as shown in the figure. The pressures of the water at locations a and b in the pipe support columns of water that differ in height by L = 12 in. The atmospheric pressure is 14.7 Ibf/in?, the specific volume of water is 0.01604 ft/lb, and the acceleration of gravity is g = 32.0 ft/s?. Patm = 14.7 Ibr/in.? g = 32.0 ft/s² Water v = 0.01604 ft/lb Determine the difference in pressure between points a and b, in Ibf/in2?. Does the pressure increase or decrease from point a to point b? Sten 1arrow_forward
- You are being tasked as a wind tunnel engineer to investigate the performance of newly designed high-speed wind tunnel in UPNM. An exhaust gas flows through a nozzle where the inlet area is 5,000 cm2.At this inlet, the gas has a velocity of 1,200 m/s, temperature of 1,500oC,and pressure of 6,000 kPa. Initial measurement revealed that the pressure at the exit of the wind tunnel is 100 kPa. Based on this information, analyze and investigate ; i. Mach number at inlet of the nozzle ii. The velocity of gas at exit iii. The area of the nozzle at exit Take specific heat ratio for the exhaust gas, ? to be 1.7 and the gas constant, R to be 205 J/kg.arrow_forward1. The deformation of the fluid will continue as long as the 2. When designing gates, vessels, dams or other bodies that are submerged in a liquid, it is important not only to estimate the - 3. The surface tension is the tensile force per -- in any direction along the surface the surface tension. 4. The value of - specifies whether the fluid can be assumed compressible or incompressible. 5. Archimedes' principle indicates- 6. A truck is filled with gasoline. If the container (tank) on the truck undergoes a - - is applied. - but also to specify its location on the body. then the liquid surface will begin to rotate clockwise about the center of the container and will eventually maintain a fixed tilted position.arrow_forwardIn a chemistry plant, through a horizontal smooth pipeline with a diameter of 0,3 m, a fluid with density and viscosity of 769 kg/m3 and 0,0007 Pa-s, respectively is flowing with a flow rate of 0,009 m3/s. Disregarding the pipe entrance effects and treating flow being steady, uniform and incompressible; a) Find the magnitude of mean velocity (in m/s). (Please use only 3 decimal digits.) b) Find Reynolds number. (Please do not use any decimal digit.) c) Find the magnitude of friction factor. (Please use 4 decimal digits.)arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Elements Of ElectromagneticsMechanical EngineeringISBN:9780190698614Author:Sadiku, Matthew N. O.Publisher:Oxford University PressMechanics of Materials (10th Edition)Mechanical EngineeringISBN:9780134319650Author:Russell C. HibbelerPublisher:PEARSONThermodynamics: An Engineering ApproachMechanical EngineeringISBN:9781259822674Author:Yunus A. Cengel Dr., Michael A. BolesPublisher:McGraw-Hill Education
- Control Systems EngineeringMechanical EngineeringISBN:9781118170519Author:Norman S. NisePublisher:WILEYMechanics of Materials (MindTap Course List)Mechanical EngineeringISBN:9781337093347Author:Barry J. Goodno, James M. GerePublisher:Cengage LearningEngineering Mechanics: StaticsMechanical EngineeringISBN:9781118807330Author:James L. Meriam, L. G. Kraige, J. N. BoltonPublisher: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
8.01x - Lect 27 - Fluid Mechanics, Hydrostatics, Pascal's Principle, Atmosph. Pressure; Author: Lectures by Walter Lewin. They will make you ♥ Physics.;https://www.youtube.com/watch?v=O_HQklhIlwQ;License: Standard YouTube License, CC-BY
Dynamics of Fluid Flow - Introduction; Author: Tutorials Point (India) Ltd.;https://www.youtube.com/watch?v=djx9jlkYAt4;License: Standard Youtube License