Page 131 - 48Fundamentals of Compressible Fluid Mechanics
P. 131
5.3. THE MOVING SHOCKS
93
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3
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The about table for obtained utilizing Potto-GDC with the iteration request.
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Example 5.4:
'3
What should be the prime Mach number (or the combination velocity with the tem-
perature, those who like extra step) in order to double temperature when the valve
is suddenly and totally close?
SOLUTION
The ratio can be obtained from from Table (5.3). It also can be obtained from the
stationary normal shock wave table. Potto-GDC provides for this temperature ratio
the following table
(
( using this number in the moving shock
table provides
which means that the required
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3
3'3
*%
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Example 5.5:
0 ('(/%
0(*% %
3
(
*%'
Open question to be addressed in the next version.
A gas is flowing in a pipe with Mach number of 0.4. Calculate the speed of the
shock when a valve is close in such a way that the Mach number is reduced to half.
Hint, this is semi close valve case in which the ratio of prime Mach number is half
(the new parameter that add in the general case).
SOLUTION
Example 5.6:
Open question to be addressed in the next version.
A piston is pushing air flowing in tube with Mach number of
0 . The piston