Fox and McDonald's Introduction to Fluid Mechanics
9th Edition
ISBN: 9781118912652
Author: Philip J. Pritchard, John W. Mitchell
Publisher: WILEY
expand_more
expand_more
format_list_bulleted
Concept explainers
Textbook Question
Chapter 10, Problem 80P
This ducted propeller unit drives a ship through still water at a speed of 4.5 m/s. Within the duct the mean velocity of the water relative to the unit is 15 m/s. Calculate the propulsive force produced by the unit. Calculate the force exerted on the fluid by the propeller. Account for the difference between these forces.
P10.80
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
Analyze to select the type of the turbine when its diameter is 600 mm, rotational
speed is 600 rpm and working under a water head of 120 meters. The buckets
deflect the 100 mm diameter jet through an angle of 165°. Take the coefficient
of velocity for the nozzle as 0.97. Use Table given below for selection of turbine.
Sr. # Specific speed (rpm)
Type of turbine
1
8-30
Pelton wheel with one nozzle
30 - 50
Pelton wheel with 2 or more nozzles
50-250
Francis turbine
4
250-1000
Kaplan turbine
2.
3.
B/A pump operates at 17237.5 kPa, discharges 11.4 liter/min and requires a power
3.75 kW to drive the pump. Compute the overall efficiency of the pump. If the
pump is driven at 1725 rpm. What is the input torque to the pump.
8.78. A pump is designed to operate at 1 800 r/min with 83.7% efficiency, and deliver 250 1/s
with a power consumption of 141 kW. What is its specific speed and type?
8.79. A manufacturer states that it can deliver a pump operating at 690 r/min that delivers
285 1/s at 78% efficiency with a power consumption of about 5.2 kW under a head of 1.5 m.
What type of pump is it? Is the efficiency claim reasonable, too high, or too low?
8.80. Determine Ns for both model and prototype turbines in problem 8.75.
Chapter 10 Solutions
Fox and McDonald's Introduction to Fluid Mechanics
Ch. 10 - The geometry of a centrifugal water pump is r1 =...Ch. 10 - Find the resulting -groups when (a) D, , and Q or...Ch. 10 - Consider the centrifugal pump impeller dimensions...Ch. 10 - Dimensions of a centrifugal pump impeller areCh. 10 - Dimensions of a centrifugal pump impeller areCh. 10 - The blade is one of a series. Calculate the force...Ch. 10 - This blade is one of a series. What force is...Ch. 10 - A centrifugal water pump, with 15-cm-diameter...Ch. 10 - A centrifugal water pump designed to operate at...Ch. 10 - A series of blades, such as in Example 10.13,...
Ch. 10 - In passing through this blade system, the absolute...Ch. 10 - A centrifugal pump runs at 1750 rpm while pumping...Ch. 10 - A centrifugal water pump designed to operate at...Ch. 10 - Kerosene is pumped by a centrifugal pump. When the...Ch. 10 - In the water pump of Problem 10.8, the pump casing...Ch. 10 - Use data from Appendix C to choose points from the...Ch. 10 - Data from tests of a water suction pump operated...Ch. 10 - A centrifugal pump impeller having r1 = 50 mm, r2...Ch. 10 - A centrifugal pump impeller having dimensions and...Ch. 10 - An axial-flow fan operates in sea-level air at...Ch. 10 - Data measured during tests of a centrifugal pump...Ch. 10 - A small centrifugal pump, when tested at N = 2875...Ch. 10 - If the impeller of Problem 10.20 rotates between...Ch. 10 - At the outlet of a pump impeller of diameter 0.6 m...Ch. 10 - Typical performance curves for a centrifugal pump,...Ch. 10 - A pump with D = 500 mm delivers Q = 0.725 m3/s of...Ch. 10 - At its best efficiency point ( = 0.87), a...Ch. 10 - Using the performance curves in Appendix C, select...Ch. 10 - A pumping system must be specified for a lift...Ch. 10 - A centrifugal water pump operates at 1750 rpm; the...Ch. 10 - A set of eight 30-kW motor-pump units is used to...Ch. 10 - A blower has a rotor with 12-in. outside diameter...Ch. 10 - A centrifugal water pump has an impeller with an...Ch. 10 - Appendix C contains area bound curves for pump...Ch. 10 - Use data from Appendix C to verify the similarity...Ch. 10 - A centrifugal water pump has an impeller with...Ch. 10 - Catalog data for a centrifugal water pump at...Ch. 10 - A 1/3 scale model of a centrifugal water pump...Ch. 10 - Sometimes the variation of water viscosity with...Ch. 10 - A large deep fryer at a snack-food plant contains...Ch. 10 - Data from tests of a pump, with a...Ch. 10 - A four-stage boiler feed pump has suction and...Ch. 10 - A centrifugal pump operating at N = 2265 rpm lifts...Ch. 10 - A centrifugal pump is installed in a piping system...Ch. 10 - Part of the water supply for the South Rim of...Ch. 10 - Consider the flow system shown in Problem 8.94....Ch. 10 - Afire nozzle is supplied through 300 ft of...Ch. 10 - Performance data for a centrifugal fan of 3-ft...Ch. 10 - The performance data of Problem 10.57 are for a...Ch. 10 - Experimental test data for an aircraft engine fuel...Ch. 10 - Preliminary calculations for a hydroelectric power...Ch. 10 - Conditions at the inlet to the nozzle of a Pelton...Ch. 10 - A Francis turbine is to operate under a head of 46...Ch. 10 - A Kaplan (propeller with variable-pitch blades)...Ch. 10 - Francis turbine Units 19, 20, and 21, installed at...Ch. 10 - Measured data for performance of the reaction...Ch. 10 - For a flow rate of 12 L/s and turbine speed of 65...Ch. 10 - The velocity of the water jet driving this impulse...Ch. 10 - An impulse turbine is to develop 15 MW from a...Ch. 10 - An impulse turbine under a net head of 33 ft was...Ch. 10 - The absolute velocities and directions of the jets...Ch. 10 - A fanboat in the Florida Everglades is powered by...Ch. 10 - A jet-propelled aircraft traveling at 225 m/s...Ch. 10 - When an air jet of 1-in.-diameter strikes a series...Ch. 10 - The volume flow rate through the propeller of an...Ch. 10 - A typical American multi blade farm windmill has D...Ch. 10 - An airplane flies at 200 km/h through still air of...Ch. 10 - This ducted propeller unit drives a ship through...Ch. 10 - A model of an American multi blade farm windmill...Ch. 10 - A large Darrieus vertical axis wind turbine was...Ch. 10 - Show that this ducted propeller system when moving...Ch. 10 - This ducted propeller unit (now operating as a...Ch. 10 - What is the maximum power that can be expected...Ch. 10 - If an ideal windmill is operating at best...Ch. 10 - A prototype air compressor with a compression...Ch. 10 - Prob. 89PCh. 10 - We have seen many examples in Chapter 7 of...
Additional Engineering Textbook Solutions
Find more solutions based on key concepts
The light bracket ABC is freely hinged at A and is constrained by the fixed pin in the smooth slot at B. Calcul...
Engineering Mechanics: Statics
What parts are included in the vehicle chassis?
Automotive Technology: Principles, Diagnosis, and Service (5th Edition)
A school classroom is designed for 30 people. (a) What is the minimum amount of clean outdoor air required? (b)...
Heating Ventilating and Air Conditioning: Analysis and Design
ICA 17-24
The decay of a radioactive isotope can be theoretically modeled with the following equation, where C0...
Thinking Like an Engineer: An Active Learning Approach (3rd Edition)
Determine the force in the hydraulic cylinder AB and the force in links AC and AD when the load is held in the ...
Engineering Mechanics: Statics
21. The Units Society Empire (USE) had defined the following set of "new" units: 1 leap = 4 years [yr]. Convert...
Thinking Like an Engineer: An Active Learning Approach (4th Edition)
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
- A Pelton wheel has a mean bucket speed of 10 m/s with a jet of water flowing at the rate of 0.7 m³/s under a head of 30 m. If the buckets deflect the jet through an angle of 160°. Calculate the power given by water to the runner and hydraulic efficiency of turbine. Assume the coefficient of velocity of 0.98.arrow_forward1. A pump pumping liquid propellant operates at 10,000 rpm. The volumetric flow rate through the pump is 5,000 gpm. The pressure drop across the pump is 750 psi. Propellant density is 71lbm/ft³. Calculate the head produced by the pump. b. Calculate the pump specific speed. Is this a high-performance pump or a low- performance pump? Calculate the input power to the fluid, i.e. the fluid horse power, fnp. а. С.arrow_forwardA single-stage centrifugal pump has an impeller speed of 1750 rpm. If the flow rate of water is 60 gal/min, determine the expected head. Choices: 45 ft 60 ft 29 ft 18 ftarrow_forward
- 20. A centrifugal pump has an impeller 45 cms in diameter running at 450 rpm. - The discharge at inlet is entirely radial. The velocity of flow at outlet is 12. m/sec. The vanes are curved back- wards at outlet at 30° to the wheel tangent. If the discharge of the is 0'15 cumec calculate the impeller horse power and the (18'42 hp ; 29 31 kgm) pump torque on the shaft.arrow_forwardA Pelton wheel has a mean bucket speed of 10 meters per second with a jet of water flowing at a rate of 700 liters/s under a head of 30 meters. The buckets deflect the jet through an angle of 160°. Calculate the power given by water to the runner and the hydraulic efficiency of the turbine. Assume co-efficient of velocity as 0.98.arrow_forwardDetermine the least number of stages for a multi-stage pump to deliver 80 L/s against a total head of 240m when running at 1450 rpm if the specific speed (per stage) must not be less than 670. Select the correct response: 6. 3. 4. 7. 8arrow_forward
- A pump with an impeller diameter of 300 mm running at a speed of 2950 rev/min delivering 450 L/min of water at a head of 350 kPa is going to be replaced by a geometrically similar spare pump running at a speed of 1450 rev/min delivering the same flow rate and head. Determine the impeller size of the spare pump and the percentage increase (decrease) of power required for the spare pump. OL. 380.1 mm; a decrease of 61.33% OI., 380.1 mm; an increase of 38.77% I. 147.5 mm; an increase of 3.4% IV. 210.3 mm; a decrease of 83.1%arrow_forwardQ1 A centrifugal pump operates at a speed of 1150 r/min and discharges 2.3 m' /min against a head of 120 kPa. The power required is 8.2 kW. Compute (a) the efficiency of the pump, (b) the discharge, head, and power if the pump speed were changed to 1750 r/min.arrow_forward1.) A horizontal pipe bent reduces from 300 mm bore diameter at inlet to 150 mm diameter at outlet. The bend is swept through 50° from its initial direction. The flow rate is 0.05 m3/s and the density is 1000 kg/m³. Calculate the momentum force on the bend and resolve it into two perpendicular directions relative to the initial direction. 2.) A jet of water traveling with a velocity of 25 m/s and flow rate of 0.4 kg/s is deflected 150° from its initial direction by a stationary vane. Calculate the force on the vane acting parallel to and perpendicular to the initial direction.arrow_forward
- The mean radius of an axial flow reaction turbine is 2.6 ft. and the axial velocityis 25 ft./s. The wicket gates are turned at an angle such that relative velocity at theinlet flow makes an angle of -45° with the blade velocity. The wheel and hub radiiare 3.6 ft. and 1.6 ft., respectively. The turbine rotates at 240 rpm. If water leaves theblade in a purely axial direction, calculate H and all relevant angles.Ans: H=81.87 ft.; α1=31.8°; β2=20.93°arrow_forwardIt is proposed to design a homologous model for a centrifugal pump.the prototype pump is to run at 600rpm and develop 30m head the flow rate being 1 m^3/s. The model of 1/4 scale is to run at 1450 rpm. Determine the head developed discharge and power required for the model. Overall efficiency is 80%.arrow_forwardC2. A conical tube is fixed vertically with its smaller end upwards and it forms a part of the pipeline. The velocity at the smaller end is 4.9 m/s and at the larger end is 2.5 m/s. The length of the conical tube is 1.3 m and the flow rate of the water is 127 liters/s. The pressure at the smaller end is equivalent to a head of 10.1 m of water. Considering the following two cases: (1) Neglecting friction, (without head loss) determine (i) the diameter at the smaller end in meter, (ii) the diameter at the larger end in meter, and (ii) the pressure at the larger end of the tube in m of water. (2) If a head loss (with head loss)in the tube,h = 0.0153(V1-V2)2, where V1 is the velocity at the smaller end and V2 is the velocity at the larger end, determine (iv) the head loss in m of water and (v) the pressure at the larger end of the tube in m of water. 6) the diameter at the smaller end in meter (ii) the diameter at the larger end in meter (iii) the pressure head at the larger end of the…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
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