Applied Fluid Mechanics (7th Edition)
7th Edition
ISBN: 9780132558921
Author: Robert L. Mott, Joseph A. Untener
Publisher: PEARSON
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Chapter 19, Problem 19.25PP
A section of duct system consists of
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Chapter 19 Solutions
Applied Fluid Mechanics (7th Edition)
Ch. 19 - Determine the velocity of flow and the friction...Ch. 19 - Repeat Problem 19.1 O for duct diameters of 16,...Ch. 19 - Prob. 19.3PPCh. 19 - Determine the velocity of flow and the friction...Ch. 19 - Repeat Problem 19.40 for duct diameters of...Ch. 19 - Prob. 19.6PPCh. 19 - Prob. 19.7PPCh. 19 - '19.8 A branch duct for a heating system measures...Ch. 19 - Prob. 19.9PPCh. 19 - Prob. 19.10PP
Ch. 19 - A branch duct for a heating system measures 75250...Ch. 19 - Prob. 19.12PPCh. 19 - Prob. 19.13PPCh. 19 - Prob. 19.14PPCh. 19 - Repeat Problem 19.14, but use a five-piece elbowCh. 19 - Prob. 19.16PPCh. 19 - Prob. 19.17PPCh. 19 - Prob. 19.18PPCh. 19 - Prob. 19.19PPCh. 19 - Prob. 19.20PPCh. 19 - Compute the pressure drop as 0.20m3/s of air flows...Ch. 19 - Prob. 19.22PPCh. 19 - Compute the pressure drop as 0.85m3/s of air flows...Ch. 19 - A section of duct system consists of 42 ft of...Ch. 19 - A section of duct system consists of 38 ft of...Ch. 19 - The intake duct to a fan consists of intake...Ch. 19 - Forthe conditions shown in figs. 19.719- 19.10 0,...Ch. 19 - Forthe conditions shown in figs. 19.719- 19.10 0,...Ch. 19 - Prob. 19.29PPCh. 19 - Forthe conditions shown in figs. 19.719- 19.10 0,...
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- A horizontal air duct reduces in cross-sectional area from 0.070 m² to 0.020 m². Assuming no losses, what pressure change will occur when 6.67 N/s of air flows? (Use y = 31.4 N/m for pressure and temperature conditions involved.)arrow_forwardAn air-conditioning system is designed to have a ductwith a rectangular cross section 1 ft by 2 ft, as shown. Duringconstruction, a truck driver backed into the duct and made it atrapezoidal section, as shown. The contractor, behind schedule,installed it anyway. For the same pressure drop along the pipe,what will be the ratio of the velocity in the trapezoidal duct tothat in the rectangular duct? Assume the Darcy-Weisbach resistance coefficient is the same for both ducts.arrow_forwardA smooth horizontal pipe with uniform 33 mm diameter has a pressure drop of 44 kPa with a length of 206 m. Find the headloss in m. ( Hand written please )arrow_forward
- A two branch duct system of circular duct is shown below. The fittings have the following equivalent lengthof straight duct upstream to branch 4m elbow 2m. There is negligible pressure loss in the straight throughsection of the branch. The designer slects 4pa/m as the pressure gradient in the 12- and -15m straight sections. What diameter in should be selected in the 15 m branch section? A. 0.35 B. 0.66 C. 0.56 D. 0.46arrow_forwardWater at 38°C flows from A to B through 244 m of average 300-mm-I.D. cast iron pipe (∊ = 0.00061 m). Point B is 9.1 m above A, and the pressure at B must be maintained at 138 kPa. If 0.222 m3/s is to flow through the pipe, what must be the pressure at A?arrow_forwardA two branch duct system of circular duct is shown below. The fittings have the following equivalent lengthof straight duct upstream to branch 4m elbow 2m. There is negligible pressure loss in the straight throughsection of the branch. The designer slects 4pa/m as the pressure gradient in all sections. What diameter in m should be selected in the 7-m branch? A. 0.44 B. 0.64 C. 0.34 D. 0.54arrow_forward
- If a dust-proofing oil at 30°C had been flowing at 0.046 m /s through a 150-mm pipe in which along-radius flow nozzle 75 mm in diameter, what would have been the deflection of the mercury? Assume C=0.98.arrow_forwardThe following system is fed by a centrifugal pump. The piping is constructed from smooth plastic of OD 55 mm, wall thickness 2.5 mm. The minor losses for the system prior to the pump are given by KL = 12.0. The system curves for this pump are attached. If the flowrate is reduced to 1.4 m3/hr, and the upstream head requirement were 17 m, what would the electrical power requirement of the pump be?arrow_forwarda horizontal venturimeter with inlet and throat diameters 160 mm and 60 mm respectively is used to measure the flow of an oil of specific gravity 0.8. If the discharge of the oil is 0.05 m3/s, find the deflection of oil mercury gauge. take venturimeter constant = 1arrow_forward
- Two 32-in pumps from Fig. are to be used in seriesat 1170 r/min to lift water through 500 ft of vertical castiron pipe. What should the pipe diameter be for most effi -cient operation? Neglect minor losses.arrow_forwardFor the duct system, plot required fan head Hrequired (mm of water column) as a function of volume flow rate V. (Lpm). On the same plot, compare available fan head Havailable versus V. , and mark the operating point. Discuss.arrow_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_forward
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