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 22P
To determine
The effect on pump performance curve, the system curve and the operating point, if a valve changes from 100% to 50% open.
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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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- The head-versus-flow-rate characteristics of a centrifugalpump are shown in Fig.. If this pump drives water at20°C through 120 m of 30-cm-diameter cast iron pipe,what will be the resulting flow rate, in m3/s?arrow_forwardThe pump in Fig. draws gasoline at 20 ° C from areservoir. Pumps are in big trouble if the liquid vaporizes(cavitates) before it enters the pump. ( a ) Neglecting lossesand assuming a fl ow rate of 65 gal/min, fi nd the limitationson ( x , y , z ) for avoiding cavitation. ( b ) If pipe frictionlosses are included, what additional limitations might beimportant?arrow_forwardPlease anybody answer this ASAP,i need the answer in 40 min Air flows isentropically through a channel To = 310 ° C. The two ends have identical areas, namely A = 25 cm², pressure p1 = 160 kPa and p2 = 65 kPa Determine a). Mass flow rate, b). Throat area and C). Ma2arrow_forward
- 1. Assume a horizontal shaft handling water at 65 deg C (Pv=2.503 KPa, Density=980.5 m3/kg). The suction nozzle is 4.35 m below the pump centerline and the pressure gauge reading at this point is 221Kpag. Determine the NPSHa if the head loss is 0.82 m. If the NPSHr is 3m less than the NPSHa you got on question number 1, determine the pump suction specific speed at pump rotating at 1800rpm and Q=500gpmarrow_forwardThe 28-in-diameter pump in Fig. at 1170 r/min isused to pump water at 20°C through a piping system at14,000 gal/min. (a) Determine the required brake horsepower.The average friction factor is 0.018. (b) If there is65 ft of 12-in-diameter pipe upstream of the pump, how farbelow the surface should the pump inlet be placed to avoidcavitation?arrow_forwardHere, a flow rate of 2 m3/s is active in a pipe, as seen in the attached figure. What is the expected power output of the turbine with 70% efficiency if the elevation difference of the reservoir surfaces is 60 m? How would I draw a EGL and HGL for this system?arrow_forward
- This problem is useful for the preliminary design of a hydroturbine. From the material learned in this chapter, it is fairly simple to estimate how much power a hydroturbine can generate, given only the flow rate of water and the elevation difference upstream and downstream of the dam. A dam has a gross head of 15.5 m and a flow rate of 0.22 m3 /s. Approximating the overall efficiency of the turbine/generator to be 75%, estimate the electrical power (in kW) that couldbe produced.arrow_forwardThe design of a new dam reveals that a water head of 10 meter and water flow rate of 100 cubic meter per second (m3/s) can be supplied for electricity generation. What kind of turbines would you recommend for the electric power generation?arrow_forwardSketch and discuss in great detail the different pump curves including supply curve, system curve and efficiency curve.arrow_forward
- In a horizontal pipe water flows at a rate of 9.1 L/s. Here, the pipe has two sections, one with a diameter of 10.16 cm and the other with a diameter of 5.08 cm, with a gradual smooth reducing section. In this case, a mercury manometer is used to measure the pressure difference. If friction is negligible how would I find the differential height of mercury between the two sections? If the manometer on the 5.08cm pipe section was replaced with a pitot tube how would the reading change? any help would be deeply appreciatedarrow_forwardBy searching the web or any other source, discuss how pumps in series and pumps in parallel affect flow rate and pressure.arrow_forwardA pump is discharging 12 liters/sec of water through 10 cm diameter pipe. When the pressure on the discharge side of the pump is 700 kPa, what pressure can be expected in the discharge pipe at a point 540 m distant from the pump and 45 m higher in elevation. Use n = 0.015.arrow_forward
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