Unformatted text preview: OBLEM 2b
Using Fig 4-27 (a) from the lecture notes, we find The wave angle is smaller by 8 degrees in comparison to the wedge in 2(a).
Using Fig 4-27 (b) from the lecture notes we find The pressure can be calculated using the formula derived in part (2a)
( ) We see that the pressure coefficient and the pressure on the surface of the cone is lower compared to
that of a compression corner.
From the chart, we have for M=3.6 and , The normal component of the Mach number is therefore
( ) From appendix B, The Mach number after the oblique shock is therefore
( ( ) ) The flow passing the first oblique shock wave impinges on the second wall and is turned by an angle
and at Mach number of M2=2.49078.
From the chart, we have Hence the normal component ()
( From appendix B ) The mach number after the reflected shock is therefore,
( ( ) ) PROBLEM 3b
The obshk program puts out NaN if the deflection angle or the Mach number is too high. We therefore
make use of this fact to determine the value of at which we see a Mach reflection.
The MATLAB p...
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- Spring '09
- Fluid Dynamics, Mach number, Shock wave, Oblique shock, Rayleigh Pitot