Page 259 - 48Fundamentals of Compressible Fluid Mechanics

13.4. SOLUTION OF MACH ANGLE 221

approximation of weak weak wave with non zero strength has engineering applica-
bility in limited cases especially in acoustic engineering but for most cases it should
be ignored.

Oblique Shock
k = 1 4 M =3
x
3 90 0.001

80
2.5
70
0.0005 My q
w s
My q
2 60 s w
50
1.5 0
0 10 20 30
40
1 30
-0.0005
20
0.5
10

0 0 -0.001
0.0 10.0 d 20.0 30.0

Wed Jun 22 15:03:35 2005

Fig. 13.8: The calculation of D (possible error), shock angle and exit Mach number for

0 10 20 30
d
13.4.3 Upstream Mach Number, , and Shock Angle,

The solution for upstream Mach number, , and shock angle, , are far more
simpler and an unique solution exist. The deflection angle can be expressed as a
function of these variable as

(13.40)

c