Unformatted text preview: factor is 0.022 everywhere, and
pA 90 lbf/in2 gage. All pipes have a diameter of 6 in.
For water at 20°C, determine the flow rate in all pipes and
the pressures at points B, C, and D. eText Main Menu  P6.131 A watertunnel test section has a 1m diameter and flow
properties V 20 m/s, p 100 kPa, and T 20°C. The
boundarylayer blockage at the end of the section is 9 percent. If a conical diffuser is to be added at the end of the
section to achieve maximum pressure recovery, what
should its angle, length, exit diameter, and exit pressure
be?
P6.132 For Prob. 6.131 suppose we are limited by space to a total diffuser length of 10 m. What should the diffuser angle, exit diameter, and exit pressure be for maximum recovery?
P6.133 A windtunnel test section is 3 ft square with flow properties V 150 ft/s, p 15 lbf/in2 absolute, and T 68°F.
Boundarylayer blockage at the end of the test section is
8 percent. Find the angle, length, exit height, and exit pressure of a flatwalled diffuser added onto the section to
achieve maximum pressure...
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 Spring '08
 Sakar
 Fluid Dynamics, eText Main Menu, Osborne Reynolds

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