Page 151 - 48Fundamentals of Compressible Fluid Mechanics

6.1. NOZZLE EFFICIENCY 113

The nozzle area can be calculated by

3

(

is constant (constant mass flow). First the stagnation behind the

shock will be
In this case,

(*

'
'

Example 6.4: 3!(

%(

%

%
The speed of the a shock is moving at 2000 [m/sec] in pipe with gas with
,

. Calculate the condition after the

!(

shock.
pressure of 2[Bar] and temperature of
SOLUTION
Example 6.5:
An inventor interested in a design of tube and piston so that the pressure is double
in tube when the piston is suddenly moving. The propagating piston is assumed
. If the
steady state is achieved, what the piston velocity should be?

to move in temperature of
SOLUTION and about atmospheric pressure of

Example 6.6:
A flow of gas is brought into sudden stop. The mass flow rate of the gas is 2
. The imaginary gas conditions are
[kg/sec] and cross section is A = 0.002
(Butane). Calculate the condition behind the shock wave. and

temperature is
SOLUTION and pressure is and