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 7.25PP
Calculate the power delivered by the oil to the fluid motor shown in Fig. 7.29 if the volume flow rate is
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5. Calculate the power delivered by the oil to the fluid motor shown in the following figure
if the volume flow rate is 0.25 m3/s. There is an energy loss of 1.4 N.m/N in the piping
system. If the motor has an efficiency of 75 percent, calculate the power output. (
Oil
(sg=0.86)
Motor
Flow
Diameter 15 cm-
10 m
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.
A pipe bends through 900 from its initial direction as shown in fig.13. The pipe reduces
in diameter such that the velocity at point (2) is 1.5 times the velocity at point (1). The
pipe is 200 mm diameter at point (1) and the static pressure is 100 kPa. The volume
flow rate is 0.2 m3/s. Assume there is no friction. Calculate the following.
a) The static pressure at (2).
b) The velocity at (2).
c) The horizontal and vertical forces on the bend FH and Fy.
d) The total resultant force on the bend.
(1)
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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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.Similar questions
- pump is used to collect water from an underground tank. the tank water level is 5.44 meters below the pump and the flow is 25.5 litres per second through a 75 mm diameter pipe. calculate the pressure pump and the inletarrow_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_forwardReducer connection connecting a pipe that carries water with a diameter of A (mm) and another with a diameter of B (mm). If the pressure difference between the two ends of the joint is equal to C (mm) of mercury, calculate the average velocity at the inlet and outlet sections, and find the volumetric flow rate if the loss is small that can be neglected.arrow_forward
- Topics: Fundamental of fluid flow Oil (SG=0.82) entering a pump through an 8-inch diameter pipe at 4 psi has a flow rate of 3.5 cfs. It leaves the pump through a 4-inch diameter pipe at 15 psi. Assuming that the suction and discharge sides of the pump are at the same elevation, find the horsepower delivered to the water by the pump (550 lb.ft/s = 1 HP). Illustrate the problem and show your complete solution.arrow_forward8. In the regenerative circuit shown below, the pump's flow rate is 10 gpm. If the piston diameter is 7 in and the rod diameter is 5 in (not a 2:1 cylinder), calculate the extension speed in in/min. Also calculate the oil flow rate at points A and B in gpm. (recall 1 gal = 231 in') PF The diagram above does not show a working regenerative circuit. What must be added in order for the circuit to be practical and why?arrow_forward1. The pressure in a hydraulic system has 120 bars and the engine power of 55.21 kw. Calculate the capacity of the pump to supply the system?2. The above pump had an actual flow of 90 liters/minute at 207 bar. Calculate the power of the hydraulic engine system?arrow_forward
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- 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 diagramarrow_forwardItem#3 A pipe handles a flow rate of 0.002 m³/s. Find the minimum inside diameter that will provide an average fluid velocity not to exceed 6.1 m/s.arrow_forwardPatrick is building a cabin on a hillside and has proposed the water system shown below. The distribution tank in the cabin maintains a pressure of 27 psig above the water. There is an energy loss of 14.6 lb*ft/lb in the piping. When the pump is delivering 37 gal/min of water, compute the horsepower delivered by the pump to the water. PA = Submit Question Distribution tank 4 ft Flow hp 214 ft Pump 1 ftarrow_forward
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