Applied Fluid Mechanics (7th Edition)
7th Edition
ISBN: 9780132558921
Author: Robert L. Mott, Joseph A. Untener
Publisher: PEARSON
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Chapter 7, Problem 7.44PP
The test setup in Fig. 7.39 measures the pressure difference between the inlet and the outlet of the fluid motor. The flow rate of hydraulic oil (sg =
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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.
8.) A liquid having a sp.gr. of 20 is flowing in a 50 mm diameter pipe. The total head at a
given point was found to be 17.5 Joule per Newton. The elevation of the pipe above the datum is 3 m and the pressure in the pipe is 65.6 kPa. Compute the velocity of flow and
the horsepower in the stream at that point.
Subject: Fluid Mechanic
Lesson: Relative Equilibrium of Liquids
Fundamentals of Fluid Flow
5. Oil of specific gravity 0.750 is pumped from a tank over a hill through a 24′′ pipe with the pressure at
the top of the hill maintained at 25.5 psi. The summit is 250 ft above the surface of the oil in the tank,
and oil is pumped at the rate of 22.0 cfs. If the lost head from tank to summit is 15.7 ft, what
horsepower must the pump supply to the liquid? indicate free body diagram
Chapter 7 Solutions
Applied Fluid Mechanics (7th Edition)
Ch. 7 - A horizontal pipe carries oil with a specific...Ch. 7 - Water at 40 F is flowing downward through the...Ch. 7 - Find the volume flow rate of water exiting from...Ch. 7 - A long DN 150 Schedule 40 steel pipe discharges...Ch. 7 - Figure 7.14 shows a setup to determine the energy...Ch. 7 - A test setup to determine the energy loss as water...Ch. 7 - The setup shown in Fig. 7.16 is being used to...Ch. 7 - A pump is being used to transfer water from an...Ch. 7 - In Problem 7.815 (Fig. 7.17), if the left-hand...Ch. 7 - A commercially available sump pump is capable of...
Ch. 7 - A submersible deep-well pump delivers 745 gal/h of...Ch. 7 - In a pump test the suction pressure at the pump...Ch. 7 - The pump shown in Fig. 7.19 is delivering...Ch. 7 - The pump in Fig. 7.20 delivers water from the...Ch. 7 - Repeat Problem 7.14, but assume that the level of...Ch. 7 - Figure 7.21 shows a pump delivering 840L/min of...Ch. 7 - Figure 7.22 shows a submersible pump being used to...Ch. 7 - Figure 7.23 shows a small pump in an automatic...Ch. 7 - The water being pumped in the system shown in Fig....Ch. 7 - A manufacturer's rating for a gear pump states...Ch. 7 - The specifications for an automobile fuel pump...Ch. 7 - Figure 7.26 shows the arrangement of a circuit for...Ch. 7 - Calculate the power delivered to the hydraulic...Ch. 7 - Water flows through the turbine shown in Fig....Ch. 7 - Calculate the power delivered by the oil to the...Ch. 7 - What hp must the pump shown in Fig. 7.30 deliver...Ch. 7 - If the pump in Problem 7.26 operates with an...Ch. 7 - The system shown in Fig. 7.31 delivers 600 L/min...Ch. 7 - Kerosene (sg = 0.823 ) flows at 0.060m3/s in the...Ch. 7 - Water at 60 F flows from a large reservoir through...Ch. 7 - Figure 7.34 shows a portion of a fire protection...Ch. 7 - For the conditions of Problem 7.31 and if we...Ch. 7 - In Fig. 7.35 kerosene at 25 F is flowing at 500...Ch. 7 - For the system shown in Fig. 7.35 and analyzed in...Ch. 7 - Compute the power removed from the fluid by the...Ch. 7 - Compute the pressure at point 2 at the pump inlet.Ch. 7 - Compute the pressure at point 3 at the pump...Ch. 7 - Compute the pressure at point 4 at the press...Ch. 7 - Compute the pressure at point 5 at the press...Ch. 7 - Evaluate the suitability of the sizes for the...Ch. 7 - The portable, pressurized fuel can shown in Fig....Ch. 7 - Professor Crocker is building a cabin on a...Ch. 7 - If Professor Crocker's pump, described in Problem...Ch. 7 - The test setup in Fig. 7.39 measures the pressure...Ch. 7 - If the fluid motor in Problem 7.44 has an...Ch. 7 - A village with a need for a simple irrigation...Ch. 7 - As a member of a development team for a new jet...Ch. 7 - A fire truck utilizes its engine to drive a pump...Ch. 7 - A home has a sump pump to handle ground water from...Ch. 7 - In Problem 6.107 an initial calculation was made...Ch. 7 - A creek runs through a certain part of a campus...Ch. 7 - A hot tub is to have 40 outlets that are each 8 mm...Ch. 7 - A large chipper/shredder is to be designed for use...
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- 4. Maintenance work on high pressure hydraulic systems requires special precautions because even a small leak can lead to a high-speed jet of hydraulic fluid that can cause serious injuries. Calculate and plot the jet speed of a leak versus system pressure for pressures up to 40 MPa (gage).arrow_forwardHydraulic fluid flows at velocity of 200 in/min through a conduit with an internal diameter of 2 inches. Determine the flow rate in GPM. Be aware of your units!arrow_forward3. A fire hydrant has an outlet diameter of 630 mm located 1.4 meters above the ground. If the water strikes the ground at a horizontal distance of 285 meters below the outlet, calculate the rate of discharge in gals. per min.arrow_forward
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