Page 245 - 48Fundamentals of Compressible Fluid Mechanics

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13.1 Preface to Oblique Shock

In Chapter 5 a discussion on a nor-
mal shock was presented. The nor-
mal shock is a special case of shock
and other situations exist for example ]_^ `ba
the oblique shock. Commonly in liter-
ature the oblique shock, normal shock
and Prandtl–Meyer function are pre- \
= 0
sented as three and separate and dif- [
ferent issues. However, one can view all Fig. 13.1: A view of a straight normal shock as
these cases as three different regions of limited case for the oblique shock
flow over plate with deflection section.
Clearly, variation of the deflection angle
) to positive values results in the oblique shock. Further, chang-
ing of the deflection angle to a negative value results in expansion waves. The
common presentation is done by avoiding to show the boundaries of these mod-
from a zero (c
els. Here, it is attempted to show the boundaries and the limits or connections of

207