Fluid Mechanics: Fundamentals and Applications
4th Edition
ISBN: 9781259877827
Author: CENGEL
Publisher: MCG
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Chapter 7, Problem 37EP
The aerodynamic drag of a new sports car is lo be predicted at a speed of 60.0 mill at an air temperature of 25°C. Automotive engineers build a one-third scale model of the car (Fig. P7-37E) to test in a wind tunnel. The temperature of the wind tunnel air is also 25°C. The drag force is measured with a drag balance, and the moving belt is used to simulate the moving ground (from the car's frame of reference). Determine how fast the engineers should run the wind tunnel to achieve similarity between the model and the prototype.
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Figure below shows a link mechanism in which the link OA rotates uniformly in an
anticlockwise direction at 10 rad/s. the lengths of the various links are OA=75 mm, OB-150 mm,
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A
A
B
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Space Diagram
o NTS (Not-to-Scale)
C
10
=--20125
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750 x2.01
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Tanism in which the link OA mm. O
anticlockwise direction at 10 rad/s, the lengths of the various links are OA=75mm, OB=150mm,
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A
A
Space Diagram
o NT$ (Not-to-Scale)
B
#
C
か
750 x2.01
165
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Ashaft fitted with a flywheel rotates at 300 rpm. and drives a machine. The torque
required to drive the machine varies in a cyclic manner over a period of 2 revolutions. The torque drops
from 20,000 Nm to 10,000 Nm uniformly during 90 degrees and remains constant for the following 180
degrees. It then rises uniformly to 35,000 Nm during the next 225 degrees and after that it drops to
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10,000
0
90
270
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720
Chapter 7 Solutions
Fluid Mechanics: Fundamentals and Applications
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