ABSTRACT
The properties of supersonic and subsonic flows were discussed in Chapter 2 with reference to some particular problems admitting very simple solutions. In Chapters 3 and 4 we studied local and certain general properties of both stationary supersonic and timedependent subsonic flows, that is, hyperbolic problems. In what follows, we will consider certain properties of mixed flows containing both supersonic and subsonic zones, as well as transonic transition zones with the local Mach numbersM ≈ 1. The same term transonic is reserved for the flows with the freestream Mach numberM∞ ≈ 1.
