Abstract
A solution is given, in hodograph coordinates, of the subsonic entry flow of a perfect gas in plane-parallel channels, in terms of the stream function. The particular solution and the full solution of the relevant equation are part-analytical and part-numerical. Results correspond to an approach velocity M*e = 0.5 and γ = 1.4. An error analysis is given, the results of which have general application in locating accurately the sonic line between regions of subsonic and supersonic flow. This analysis is applied in determining the steady, transonic choked flow of a perfect gas through a convergent channel. The methods of calculation can be applied in the design of engineering components, where flow structure and flow performance parameters are a basic requirement.