Numerical simulation of two-dimensional freejet flow-fields

Supersonic jet flow fields from a two dimensional sonic nozzle are computed using the piecewise linear method. The sonic radius for a two dimensional source flow is estimated using the numerical results. It is shown that the flow properties on the jet axis can be approximated by the two dimensional source flow at large distances from the nozzle. The distance of the normal shock from the nozzle increases with the stagnation to ambient pressure ratio, but is somewhat larger than experiments.