The jet stream exits a rocket motor at M=2.8 and at ambient pressure, and strikes a two-dimensional wedge with a total wedge angle of 40 deg as shown in the figure.
1. sketch the initial (incident) wave pattern that results from the jet stream striking the wedge,
2. show the additional wave pattern formed by the interaction of the initial wave system with the free boundary,
3. mark the flow direction in the region following each wave form and show what happens to the free boundary,
4. compute the Mach number and direction of the flow after the air jet passes through each system of waves.