Page 294 - 48Fundamentals of Compressible Fluid Mechanics

256 CHAPTER 14. PRANDTL-MEYER FUNCTION

()*+

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Fig. 14.10: The reversed example schematic 14.2

require either locking in the table or using the
enclosed program. S T
U K
With this pressure ratio ,

O
*
S
T
P
Q
Q
K J K

J U
PRQ U K I K I J K
For the rest of the calculation the initial condition are used. The Mach number after

the bend is J U . It should be noted that specific heat isn’t but
. The bend angle is *
U J

14.8 Combination of The Oblique Shock and Isentropic

K J K JJ J .-
J K U
Expansion
Example 14.3:
and Mach number
of 3.3. Assume that specific heat ratio at stage is , calculate the drag
coefficient and lift coefficient.

SOLUTION
the following table can be obtained
For U PRQ U J KJ K U U
Consider two dimensional flat thin plate at angle of attack of

S
T
*
O
S
P
T

Q
Q
J