On the computation of strongly underexpanded supersonic submerged jets

A finite difference method and a thorough computation method are described for clarification of regularities of off-design axisymmetric ideal gas jet propagation in a vacuum, in a submerged space, and in a coflow. A method is presented for analyzing spatial jets or jet problems with complex shock configurations in the stream domain. Longitudinal boundaries of computational cells are superposed on the streamlines to isolate them during the solution. The scheme obtained is similar to those using a Lagrange computational mesh in the numerical integration of gas dynamics.