Fluid Mechanics: Fundamentals and Applications
4th Edition
ISBN: 9781259696534
Author: Yunus A. Cengel Dr., John M. Cimbala
Publisher: McGraw-Hill Education
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Chapter 14, Problem 75CP
To determine
The definition and purpose of draft tube.
The effect of draft tube in the performance of turbo machinery.
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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
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- Select the most suitable answer A double-jet Pelton turbine generates 3750 kW when running at 375 rpm. The applied head is 200 m and the wheel diameter is 1.45 m. The bucket angle is 15° and C, = 0.97 for each nozzle. Answer the followings: Your answer The jet velocity = 63 m/s 61 m/s 68 m/s 70 m/s The bucket speed 28.5 m/s 34 m/s 31.5 m/s 43 m/s The total flow rate 4 m^3/s 3.33 m^3/s 1.66 m^3/s 2 m^3/sarrow_forwardDiscuss the primary difference between a positivedisplacement turbomachine and a dynamic turbomachine. Give an example of each for both pumps and turbines.arrow_forward[1] A Pelton turbine is driven by two jets, generating 5.0 MW at 80 rev/min. The effective head at the nozzles is 300 m of water and the nozzle velocity coefficient, KN = 0.97. The axes of the jets are tangent to a circle 2 m in diameter. The relative velocity of the flow across the buckets is decreased by 17% and the water is deflected through an angle of 165 deg. Neglecting bearing and windage losses, determine: (i) the runner efficiency; (ii) the diameter of each jet; (iii) the power specific speed.arrow_forward
- Discuss the differences between Pelton, Francis, and Kaplan turbines.arrow_forward3. A 4.0 L six-cylinder engine is operating at 3000 rpm. The engine has a compression ratio of 10:1, and volumetric efficiency of 0.85. If the bore and stroke are equal, what is the stroke, the mean piston speed, cylinder clearance volume, and air mass flow rate into the engine? Assume standard inlet conditions (Patm=101kPa and T=25°C)arrow_forwardConsider an engine with a maximum speed of 7000 rpm. The bore and stroke are 0.1 m, each. For an inlet air temperature of 330 K, determine the intake valve area (assume single valve per cylinder and take k=1.4).arrow_forward
- last digit 5 The Snecma M88 is a French afterburning turbofan engine developed by Snecma (now known as Safran Aircraft Engines) for the Dassault Rafale fighter. The following are some preliminary design data at takeoff conditions. The engine pressure ratio 24.5, bypass ratio 0.3 and total air mass flow rate 60+last digit kg/s. Inlet diffuser: stagnation pressure ratio 0.98. Fan: pressure ratio 1.3, isentropic efficiency 0.89, first-stage hubtip diameters 0.22/0.66 m, 0.96. 1. The air inlet velocity to the fan is 150 m/s entering axially and the LP-spool rotating speed is 5000 rpm. Draw the velocity triangle and blade shapes. Calculate maximum inlet relative Mach number. Check if there is any shock formation.arrow_forwardWhen the pressure is 101 Kpa and temperature is 30°C, a diesel engine has the full-throttle characteristics listed: Brake power = 285 KW Brake specific fuel consumption = 0.35 kg/KW-hr Air fuel ratio = 20 Mechanical efficiency = 89% If the engine is operate at 84.5 Kpa and temperature of 15.5°C, find brake specific fuel consumption kg/kwh.arrow_forwardThe outer diameter of a Francis runner is 1.4 m. The flow velocity at inlet is 9.5 m/s. The absolute velocity at the exit is 7 m/s. The speed of operation is 430 rpm. The power developed is 12.25 MW, with a flow rate of 12 m3/s. Total head is 115 m. For shockless entry determine the angle of the inlet guide vane. Also find the absolute velocity at entrance, the runner blade angle at inlet and the loss of head in the unit. Assume zero whirl at exit. Also fluid the specific speed.arrow_forward
- Turboprop engine with free power turbine has the following data: m₂ = 3 = 15 kg/s T₁ = 249 K . H = 6 km Pa = 47.2 kPa Po = 6 P02 Mo = 0.6 Te = T04 = 1120 K P04 = 0.96P03 nd = 0.95 NCC = 0.98 7c = 0.87 1/1 = "FPT = I=0,9. ng = 0.95 "Pr = 0.8 CPC = 1.01 kJ/kg K CP₁ = CPFPT = CP₁ = 1.14 kJ/kg K QR = 43,000 kJ/kg. The power in the gases leaving the gas generator-turbine is divided between the free power turbine and the nozzle based on the optimum condition α = opt. Calculate the ESHP and the ESFC.arrow_forwardمراد جبار فرحان In a gas turbine engine (A, = 2.85 A2, p1 = 1.14 p2, p1 = 100.5 kPa, T, = 11 °C, v1 = 107 m-s1, V2 = 785 m-s", A, = 2.4 m?), calculate the thrust force. %3D %3D ===arrow_forwardJohn’s automobile has a three-liter SI-V6 engine that operates on a four-stroke cycle at 3600 RPM. The compression ratio is 9.5, the length of connecting rods is 16.6 cm, and the engine is square (B=S). at this speed, combustion ends at 20o at T.D.C. This engine is connected to Dynamometer which gives a brake output torque reading of 205 N-m. At his speed, air enters the cylinders at 85 kPa and 60o C, and the mechanical efficiency of the engine is 85%. Calculate: (a) Brake power, HP || (b) Indicated Power, HP || (c) Brake Mean Effective Pressure, Bmep , Psia || (d) Indicated Mean Effective Pressure, Imep, Psia || (e) Friction Mean Effective Pressure, Fmep, Psiaarrow_forward
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