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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Textbook Question
Chapter 6, Problem 87P
Water enters a mixed flow pump axially at a rate of 0.2 m3/s and at a velocity of 5 m/s. and is discharged to the atmosphere at au angle of 750 from the horizontal, as shown in Fig. P6-87. If the discharge flow area is half the inlet area, determine the force actin2 on the shaft in the axial direction.
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6-58 Water is flowing into and discharging from a pipe U-
section as shown in Fig. P6-58. At flange (1), the total
absolute pressure is 200 kPa, and 30 kg/s flows into the pipe.
At flange (2), the total pressure is 150 kPa. At location (3), 8
kg/s of water discharges to the atmosphere, which is at 100
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to be 1.03.
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6-23 A reducing elbow in a horizontal pipe is used to deflect
water flow by an angle 0 = 45° from the flow direction while
accelerating it. The elbow discharges water into the atmo-
sphere. The cross-sectional area of the elbow is 150 cm² at the
inlet and 25 cm² at the exit. The elevation difference between
the centers of the exit and the inlet is 40 cm. The mass of the
elbow and the water in it is 50 kg. Determine the anchoring
force needed to hold the elbow in place. Take the momentum-
flux correction factor to be 1.03 at both the inlet and outlet.
150 cm²
Water
30.0 kg/s
FIGURE P6-23
25 cm²
15-
40 cm
Once it has been started by sufficient suction, the siphon in Fig. 8-29 will run continuously as long as reservoir
fluid is available. Using Bernoulli's equation with no losses, show (a) that the exit velocity vz depends only
upon gravity and the distance H and (b) that the lowest (vacuum) pressure occurs at point 3 and depends on the
distance L+ H.
Fig. 8-29
Chapter 6 Solutions
Fluid Mechanics: Fundamentals and Applications
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