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
Videos
Question
Chapter 14, Problem 69P
To determine
The leading edge angle of the rotor blade.
The trailing edge angle of the rotor.
The number of blades in the rotor.
Sketch the shape of the shape of the rotor blade.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
Example (1-6): A pumping plant forces water through a 600 mm diameter main, the
friction head being 27 m. In order to reduce the power consumption, it is proposed to
lay another main of appropriate diameter along the side of the existing one, so that the
two pipes may work in parallel for the entire length and reduce the friction head to 9.6
m only. Find the diameter of the new main if with the exception of diameter, it is
similar to the existing one in every respect.
The NASA-DOE MOD-0 has a rated electrical output of 100 kW, a cut-in wind speed of 3.5 m/s, a rated
wind speed of 8 m/s, a rotor diameter of 37.5 m, a fixed rotor rotational speed of 40 r/min, and a
generator rotational speed of 1800 r/min.
(a) What is the tip speed ratio at rated wind speed?
(b) What is the tip speed ratio at cut-in?
(c) What is the overall efficiency of the turbine, drive train, and generator if Pe = 100 kW when the wind
speed is 8 m/s? Assume standard conditions.
As a junior field engineer, you have been asked to assist a contractor in resolving the following problem.
A 4.9 kW motor and gear drive rated at 175 rpm has been shipped with the four impeller blades listed
below. The baffled rapid mix tank to which one of the impellers will be installed is 3.0 m² in volume
(1.56 m diameter and 1.56 m depth).
Assume water temperature of 10C, G= 1000s, water density = 1000 kg/m³, and motor power to water
power transfer efficiency of 80%.
Impeller options:
A. Axial flow, 3 blades, diameter = 0.48 m, N₁-1.0
B. Axial flow, 3 blades, diameter = 0.61 m, Np=1.0
C. Radial flow, 6 blades, diameter = 0.48 m, Np=6.3
D. Radial flow, 6 blades, diameter = 0.61 m, Np 6.3
Answer the following:
3. What is the rotational speed (n) in rps?
b. What is the power required in kW for impeller option A?
What is the power required in kW for impeller option C?
C.
d. What is the power transferred to the water from the selected motor in kW?
e. Which impeller should be used?…
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
- Water at 20"C Bows through the pump impeller shown in the figure below, where the inner and outer diameters of the impeller are 160 mm and 400 mm respectively, and the width of the pump blades is 55 mm Part A Wan- μA Estimate the shaft power required to drive the pump at this operating condition Express your answer to three significant figures and include appropriate units. Value Blade Pump impeller The impeller rotates at 3600 rpm Under a particular operating condition, water enters in a direction normal to the inflow surface, the component of the outflow velocity normal to the outflow surface. V is equal to 17 m/s, and the magnitude of the absolute velocity, V, at the outflow surface is 33 m/s Submit Request Answer Units Outflow surface Inflow surface ? 160 บท 400 munarrow_forwardThe power output versus velocity profile for a wind turbine is shown in the figure below. Assume the rotor diameter is 80 meters, the air density is 1.22 kg/m3, the cut-in speed is 4 m/s, the rated speed is 13 m/s and the corresponding rated (i.e., peak) power output is 1500 kW. Calculate the power coefficient when the wind turbine is operating at wind speed of 5 m/s, 10 m/s and 13 m/s.arrow_forwardEach project should be presented in written and oral forms. A written individual report should contain a summary, introduction, short literature review, objectives, methodology, results and discussion and conclusion. Project 1 A vortex tube is a mechanical-thermal device that separates a compressed flow of air (or any inert gas) into hot and cold streams and has no mechanical moving parts. Cold Air Compressed Air Supply Vortex Spin Chamber (2 cold outlet f = 0.25 P₁ = 100 kPa d. e. Develop the main equations f. Estimate the COP with and without the vortex tube. https://blog.exair.com/2018/10/31/the-theory-of-the-vortex-tube/ a. Start by solving using the simple problem (problem 1) described below. b. Derive the basic equations allowing its performance evaluation. c. Develop an EES model and conduct an analysis on the thermal performance of this device. Consider three working fluids. Consider the integration of the vortex tube with a refrigeration system. Control Valve Hot Air 6 Problem…arrow_forward
- Estimate the amount of power generated by a wind turbine having a powercoefficient of 0.37 given the annual average wind speed:Rotor diameter = 125 mCenter of rotor at an elevation 160 m above the surface level.Location: Oklahoma City, OKarrow_forwardExample (1-2): A pump delivers water from a tank A (water surface elevation =110 m) to tank B (water surface elevation = 170 m). The suction pipe is 45 m long (friction factor, f = 0-024) and 35 cm in diameter. The delivery pipe is 950 m long (f = 0·022) and 25 cm in diameter. The head discharge relationship for the pump is given by Hp = (90 – 8000 Q²), where Hp is in metres and Q in m³/s. Calculate: (i) The discharge in the pipeline. (ii) The power delivered by the pump.arrow_forwardThe nominal power of the wind turbine is 3MW at wind speed 11.5m/s, generator efficiency is 94%, gear box efficiency is 0.75, power coefficient of blades is 0.59. What would be the diameter of the rotorarrow_forward
- ..... A journal bearing for a pump has the following properties: Diametral clearance ratio = 0.0013 mm Diameter of journal = 90 mm Length of bearing = 160 mm Speed of journal = 900 rpm Lubricant viscosity = 0.02 kg/m-s Lubricant temperature = 60°C Ambient temperature = 15°C Bearing pressure in pump = 1.2 MPa Heat dissipation coefficient = 1,250 W/m2-°C Determine the amount of cooling (Qg-Qd) required in W.arrow_forward2. A wind turbine has the maximum power output at the rated speed of 12 m/s and a rotor diameter of 82 meters. The cut-in and cut-out speeds for this type of wind turbine are 4 m/s and 23 m/s, respectively. The table below shows the annual wind data near a potential site for setting up a wind farm using this type of wind turbine and the power coefficient of the wind turbine at the specific wind speed. The air density is 1.22 kg/m³. Wind speed (m/s) Power coefficient 7 Hours 1190 5 0.25 3000 10 0.5 2400 15 0.25 1700 20 0.1 400 25 50 30 20 (a). What is the maximum power output of this wind turbine, assuming Betz limit? (b). What is the average power output if the wind turbine is installed at this site?. (c). What is the capacity factor of the wind turbine at this site? (d). If a wind farm consisting of 100 such wind turbines is built at the site, how much energy does this wind farm generate in a year (in the unit of kWh)? (e). Is this a good site for using this particular type of wind…arrow_forwardQ/ Size the duct system as shown in the figure below using velocity method then select Suitable diffuser for each room according to the following criteria, throw doesn't exceed 10 meter and the noise level less than 15 NC. Then calculate the fan power by KW. Assume the velocity to be 8 m/s and 4 m/s for the main and branches. Given: • R/W = 1.6 • Fan efficiency 60% • Height of the duct 300 mm • Aspect ratio doesn't exceed 6 4m Ap=40 pa Ap=30 pa Ap=50 pa A Return pressure drop Ap-50 pa 10 m cooling coil heating coil filler D2-400 L/S 4m B 4m D1=400 L/S 8m D4= 600 L/S D5-400 L/S 4m 4 m 8m m D3-600 L/Sarrow_forward
- An inflow to a turbine with a discharge of 20 m³/s leads to a ration speed of 150 rpm. The blades inlet edges have an angle of 120° to the direction of whirl. The outer diameter of the runner is 1.5 m and the runner inlet width is 1.0 m. 5. (a) To plot the velocity triangle at the blade outlet edge. (b) Assume design operating conditions and no velocity of whirl at outlet, calculate the power delivered by the runner. (c) The elevation difference between the head race and the tail race is 23 m and the head available to the turbine is 20 m, what is the hydraulic efficiency of the turbine and overall efficiency? (d) If a model of 1/10 full scale is constructed to operate under a head of 10 m, what must be its speed, power, water consumption and overall efficiency to run under the similar conditions to the prototype?arrow_forwardDetermine the pressure drop over a reducer with the following conditions: Fluid density: 25 kg/m3Fluid velocity: 1.5 m/sFluid viscosity: 0.001 Pa*sInlet diameter: 0.12 mOutlet diameter: 0.019 mPipe absolute roughness: 4e-4 m Give your final answer in Pa, rounded to the nearest whole number. [Ignore entrance/exit losses and velocity loss terms]arrow_forward4. Piping system as shown in the figure. Determine the amount of force required to pump 100 L/s of fluid (S=0.85,n=10-5 m^2/s).The pump operates with efficiency.Related n = 0,75. 'data given in the picture. Line 1: L=10 M,D=0.20 M,e=0.05mm ,K1=0.5 ,Kv =2 Line 2: L=500 M,D=0.25m ,e=0.05 mm , Ke=0,25 ,K2=1 el 20 m K, Line 2 el 10 m Line 1 K.,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 Press
Mechanics of Materials (10th Edition)Mechanical EngineeringISBN:9780134319650Author:Russell C. HibbelerPublisher:PEARSON
Thermodynamics: An Engineering ApproachMechanical EngineeringISBN:9781259822674Author:Yunus A. Cengel Dr., Michael A. BolesPublisher:McGraw-Hill Education
Control Systems EngineeringMechanical EngineeringISBN:9781118170519Author:Norman S. NisePublisher:WILEY
Mechanics of Materials (MindTap Course List)Mechanical EngineeringISBN:9781337093347Author:Barry J. Goodno, James M. GerePublisher:Cengage Learning
Engineering 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
Heat Transfer – Conduction, Convection and Radiation; Author: NG Science;https://www.youtube.com/watch?v=Me60Ti0E_rY;License: Standard youtube license