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Partially Closed Valve
Figure:
A shock as a result of
a sudden and partially a valve closing or a narrowing the
passage to the flow

The totally closed valve is a special case of a partially
closed valve in which there is a sudden change and the resistance
increases in the pipe.
The information propagates upstream in the same way as before.
Similar equations can be written:
For given static Mach numbers
the procedure for the calculation is as follows:
 (a)
 Assume that
 (b)
 .
Calculate the Mach number
by utilizing the tables or
PottoGDC
 (c)
 Calculate the ``downstream'' shock Mach number
 (d)
 Utilizing
calculate the new ``improved''
M_{x}
 (e)
 Check the new and improved
M_{x}
against the old one.
If it is satisfactory, stop or return to stage
(b).
Next: Workedout Examples for Shock
Up: The Moving Shocks
Previous: Partially Open Valve
Index
Created by:Genick BarMeir, Ph.D.
On:
20071121