Question: An air stream in which the Mach number is 3 and the pressure is 80 kPa flows between two parallel walls. The upper wall turns sharply through an angle of 18° and the lower wall turns sharply through an angle of 12° leading to the generation of two oblique shock waves that intersect each other. Sketch the flow pattern and find the flow direction, the Mach number, and the pressure immediately downstream of the shock intersection.