Applied Fluid Mechanics (7th Edition)
7th Edition
ISBN: 9780132558921
Author: Robert L. Mott, Joseph A. Untener
Publisher: PEARSON
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Chapter 8, Problem 8.23PP
The water line described in Problem 8.22was a cold water distribution line. At another point in the system, the same-size tube delivers water at
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Compute the resulting pressure in kPa after a "real" diffuser in which the energy loss due to sudden enlargement is considered for the flow of water at 25°C from a 36 mm OD x 2.0 mm wall copper tube to an 85 mm OD x 2.5 mm wall copper tube, the pipes are the same elevation. The volume flow rate is 150 L/min and the pressure before the enlargement is 500.062 kPa.
NB: OD = Outside Diameter, Wall refers to the pipe’s thickness (t)
Hints:
Obtain the specific weight of water for the given temperature from Appendix A (Table A.1).
Obtain the resistance coefficient (K) for sudden enlargement from Table 10.3B in chapter 10.
Instructions: Only express the areas in scientific notation to three decimal places but round off to three decimal places in normal number format where necessary throughout your calculations leading to the final answer and including the final answer for all other computations excluding the area.
Compute points on the velocity profile from the pipe wall to the centerline of a 3/4-in Type K copper tube if the volume flow rate of water at 60'F is Q 0.5 gal/min. Use increments of 0.05 in and include the velocity at the centerline.
please be through and provide all calculus and graphs/tables
Based on the layout of the water supply system, as show in Figure 1, the pressure, in psi, is estimated be 46 at the faucet in the and floor of the residential
building. Consider flow through the delivery pipe, Q = 1.50 cfs and diameter of the
pipe, D = 2.65 inch with e = 0.015 inch. Ingore the minor pressure losses and use
the following formulae to calculate the major pressure losses. The additional power in hp required to provide the recommended pressure of 58 psi at the building is
nearly. Assume f = 0.0175.
Use g = 62.4 lb/f3 for water. Water temperature is 20°C (68°F).
Chapter 8 Solutions
Applied Fluid Mechanics (7th Edition)
Ch. 8 - A 4-in-ductile iron pipe carries 0.20ft3/s of...Ch. 8 - Calculate the minimum velocity of flow in ft/s of...Ch. 8 - Calculate the maximum volume flow rate of fuel oil...Ch. 8 - Calculate the Reynolds number for the flow of each...Ch. 8 - Determine the smallest metric hydraulic copper...Ch. 8 - In an existing installation, SAE 10 oil (sg = 0.89...Ch. 8 - From the data in Appendix C, we can see that...Ch. 8 - Compute the Reynolds number for the flow of 325...Ch. 8 - Benzene (sg = 0.86 ) at 60c C is flowing at 25...Ch. 8 - Hot water at 80 C is flowing to a dishwasher at a...
Ch. 8 - A major water main is an 18 -in ductile iron pipe....Ch. 8 - ]8.12 An engine crankcase contains SAE 10 motor...Ch. 8 - Repeat Problem 8.12 for an oil temperature of 160...Ch. 8 - At approximately what volume flow rate will propyl...Ch. 8 - SAE 30 oil (sg = 0.89 ) is flowing at 45 L/min...Ch. 8 - Repeat Problem 8.15 for an oil temperature of 160...Ch. 8 - Repeat Problem 8.15, except the tube is 50 mm...Ch. 8 - Repeat Problem 8.17 for an oil temperature of 0 C.Ch. 8 - The lubrication system for a punch press delivers...Ch. 8 - After the press has run for some time, the...Ch. 8 - A system is being designed to carry 500 gal/min of...Ch. 8 - The range of Reynolds numbers between 2000 and...Ch. 8 - The water line described in Problem 8.22was a cold...Ch. 8 - In a dairy, milk at 100 F is reported to have a...Ch. 8 - In a soft-drink bottling plant, the concentrated...Ch. 8 - ]8.26 A certain jet fuel has a kinematic viscosity...Ch. 8 - Crude oil is flowing vertically downward through...Ch. 8 - Water at 75 C is flowing in a standard hydraulic...Ch. 8 - Fuel oil is flowing in a 4 -in Schedule 40 steel...Ch. 8 - A 3-in Schedule 40 steel pipe is 5000 ft long and...Ch. 8 - Benzene at 60 C is flowing in a DN 25 Schedule 80...Ch. 8 - As a test to determine the effective wall...Ch. 8 - Water at F flows from a storage tank through ft...Ch. 8 - A water main is an 18 -in-diameter concrete...Ch. 8 - Figure 8.12shows a portion of a fire protection...Ch. 8 - A submersible deep-well pump delivers 745 gal/h of...Ch. 8 - On a farm, water at 60 F is delivered from a...Ch. 8 - Figure 8.15 shows a system for delivering lawn...Ch. 8 - A pipeline transporting crude oil (sg = 0.93 ) at...Ch. 8 - For the pipeline described in Problem 8.39,...Ch. 8 - Water at 10 C flows at the rate of 900 L/min from...Ch. 8 - For the system shown in Fig. 8.17, compute the...Ch. 8 - Fuel oil (sg = 0.94 ) is being delivered to a...Ch. 8 - Figure 8.18 shows a system used to spray polluted...Ch. 8 - In a chemical processing system, the flow of...Ch. 8 - Water at 60 F is being pumped from a stream to a...Ch. 8 - For the pump described in Problem 8.46, if the...Ch. 8 - Gasoline at 50 F flows from point A to point B...Ch. 8 - Figure 8.20 shows a pump recirculating 300 gal/min...Ch. 8 - Linseed oil at 25 C flows at 3.65 in a standard...Ch. 8 - Glycerin at 25 C flows through a straight...Ch. 8 - Water at 75 C flows in a standard hydraulic copper...Ch. 8 - Benzene (sg = 0.88 ) at 60 C, flows in a DN 25...Ch. 8 - Water at 80 F flows in a 6 -in coated ductile iron...Ch. 8 - Water at 50 F flows at 15.0 ft3/s in a concrete...Ch. 8 - Water at 60 F flows at 1500 gal/min in a 10 -in...Ch. 8 - ]8.57 A liquid fertilizer solution (sg = 1.10 )...Ch. 8 - Crude oil (sg = 0.93 ) at 100 C flows at a rate of...Ch. 8 - Water at 65 C flows in a DN 40 Schedule 40 steel...Ch. 8 - Propyl alcohol flows in a standard hydraulic...Ch. 8 - ]3.61 Water at 70 F flows in a 12 -in-diameter...Ch. 8 - Heavy fuel oil at 77 F flows in a 6 -in Schedule...Ch. 8 - Water flows at a rate of 1.50ft3/s through 550 ft...Ch. 8 - Compute the energy loss as water flows in a...Ch. 8 - ]8.65 A water main is an 18 -in-diameter concrete...Ch. 8 - A fire protection system includes 1500 ft of 10...Ch. 8 - ]8.67 A standard hydraulic copper tube, 120 mm...Ch. 8 - Compute the energy loss as 2.0ft3/s of water flows...Ch. 8 - It is desired to flow 2.0ft3/s of water through...Ch. 8 - Specify a suitable size of new, clean Schedule 40...Ch. 8 - For the pipe selected in Problem 8.70, compute the...Ch. 8 - Compare the head loss that would result from the...Ch. 8 - In Problem 6.107, a theoretical flow rate of water...Ch. 8 - A pipeline is needed to transport medium fuel oil...Ch. 8 - Medium fuel oil at 25 C is to be pumped at a flow...Ch. 8 - A tremendous amount of study has gone into the...Ch. 8 - In a given installation, it is determined that the...Ch. 8 - "Laminar" fountains have become quite popular due...Ch. 8 - Use PIPE-FLO to model a straight horizontal run of...
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- Problem 3: A submersible deep-well pump delivers 745 gal/ h of water through a 1-in Schedule 40 pipe when operating in the system sketched in the figure below. An energy loss of 10.5 lb-ft/lb occurs in the piping system. (a) Calculate the power delivered by the pump to the water. (b) If the pump draws 1 hp, calculate its efficiency. Air Storage tank 40 psig Vent Well Flow casing 120 ft Well level Pumparrow_forwardCompute points on the velocity profile from the tube wall to the centerline of a standard hydraulic steel tube, 50 mm OD x 1.5 mm wall, if the volume flow rate of SAE 30 oil (sg = 0.89) at 110°C is 25 L/min. Use increments of 4.0 mm and include the velocity at the centerline.|arrow_forwarda. Solve for the two (2) atmospheric condition, Pn1 & Pn2 at 32.68 0C and 41.12 °C. b. Calculate the diameter of the pipe at suction side if the velocity of air flow is 22.82 m/s with flow rate of 2.96 m³ /second. c. Compute the velocity head at suction side if the velocity is 33.68 m/sec.arrow_forward
- Example Problem The fluid being pumped is oil with a specific gravity of 0.86. Calculate the energy delivered by the pump to the oil per unit weight of oil flowing in the system. Energy losses in the system are caused by check valve and friction losses as the fluid flows through the piping. The magnitude of such losses has been determined to be 1.86 N.m/N. Pump system. The volume flow rate through the pump shown in figure below is 0.014 m³/s. SOLUTION: +EO PB = 296 kPa Schedule 40 (From Pipe Supplier's Table) Wall Flow Area ao NO ao Thickness DN 50 Schedule 40 (ww) 0.002163 steel pipe 60.3 3.91 52.48 88.9 5.49 77.92 0.004768 08 GENERAL ENERGY EQUATION BETWEEN POINTS A & B: Flow PA/y + Z, + v/2g +h- hg -h = PB/y+ ZB + Vp²/2g 1.0 m %3D Therefore, Ty + 87/(A -A) + ("z - "z ) + ^/(°d - d) = 'y DN 80 Schedule 40 %3D Check valve From continuity equation, v = Q/A, find VA & VB VA = ? steel pipe PA =-28 kPa %3D Vs = ? Pump CHECK ANSWER h =42.9 m, or 42.9 N.m/N %3D 5.arrow_forwardSaturated water at 310K is being pumped from a tank to an elevated tank at the rate of 7L/s. All of the piping is in 5-in. schedule 40 steel pipe. If the 2 fittings used is 90° ell standard long radius, The pump has an efficiency of 80%. Calculate the kW power needed for the pump.arrow_forwardFind the loss in total pressure for each run in the simple duct system of Fig. 1, using the equal-friction method and in English unit. The total pressure available for the duct system is 0.12 in. wg (30 Pa), and the loss in total pressure for each diffuser at the specified flow rate is 0.02 in. wg (5 Pa). Duct fittings are listed in Table 1. Assume the duct dimeter in run 1 is 10 in. and the rest are 8 in. Does the duct system require any adjustment? 150 cfm e. a 15 ft Plenum е 15 ft 5 ft 5 ft a 3. 20 ft 4 10 ft 200 cfm e 10 ft 150 cfm b Duct Fittings for Figure 1 Fittings Type Abrupt Entrance 90 deg Elbow, Pleated Round to Rectangular boot, Straight 45 deg. Converging Wye 45 deg Elbow, Pleated a d earrow_forward
- 4. A special oil is to be used in an absorption tower. The preliminary design of the unit requires the oil to be pumped from an open tank with a 10 ft liquid level above the floor and forced through 150 ft of 3 inches schedule 40 pipe with a ball check valve and 5 elbows into the top of a tower 30 ft above the floor. The operating pressure in the tower is to be 52 psig and the oil requirement is estimated at 50 gpm. The viscosity of the oil 15 cP and its density is 53.5 Ibm/ft. Assuming the pumping outfit operates with an overall efficiency of 60%, what horsepower input will be required for the pump motor?arrow_forwardThe Figure shown below is a parallel pipeline system with two branches used to supply lubricating water to the bearings. The main line and two branches use the same size of pipes. The pressures at section 1 and section 2 are and , respectively. The resistance coefficients for two bearings are and . The cross section areas of two branch pipes are . The energy loss caused by friction can be ignored. The energy loss caused by one bend is . (4) Calculate the energy loss for branch b_________arrow_forwardCompute the energy loss as water flows in a standard hydraulic copper tube, 120 mm OD X 3.5 mm wall, at a rate of 1000 L/min over a length of 45 m.arrow_forward
- A manufacturer lists the flow coefficient for a certain control valve as 3.5 at a flow rate of 40 gal/min and a fluid Sg of 0.92 when the machine is at operating temperature. What would be the pressure drop across the valve?arrow_forwardProblem 2. Water at 150°F is pumped at the rate of 60 gal/min from a reservoir at atmospheric pressure. The gauge pressure at the end of the discharge line is 42 psi. The discharge point is 12 ft above the level is the reservoir and the suction line is 6 ft above the level of the reservoir. The discharge line is a 1 ½ in. nominal dimeter steel pipe with a schedule number of 80. The pressure drop due to friction in the suction line is known to be 0.8 psi, and that in the discharge line is 7.2 psi. The mechanical efficiency of the pump is 70%. Calculate (a) the developed head of the pump and (b) the total power input. (c) If the pump manufacturer specifies a required NPSH of 8 ft, will the pump be suitable for this service?arrow_forwardThe flow through a 1.0 in diameter pipe is 3 GPM with a pressure drop of 5 PSI. What would the pressure drop be for the same flow through a 1.5 in diameter pipe?arrow_forward
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