Transonic flows in narrow channels

This article is the written version of a lecture given at the Festkolloquium on the occasion of Prof. Dr.-Ing. Dr.techn. E.h. Jürgen Zierep’s 80th birthday held at the Universität Karlsruhe, 21 January 2009. It deals with laminar viscous inviscid interactions in transonic narrow channel flows. Special emphasis is placed on the internal structure of pseudo-shocks and properties of nozzle flows. Also, it is shown that the theory, first formulated for perfect gases, can easily be extended to the case of general single phase fluids.