A uniform parallel supersonic flow approaches a 2-D concave (compression) corner, as shown. The corner is approximated by two straight ramps, AB and BC, each making 2◦ angle with respect to their...

A uniform parallel supersonic flow approaches a 2-D concave (compression) corner, as shown. The corner is approximated by two straight ramps, AB and BC, each making 2◦ angle with respect to their upstream flow. The two C+ characteristics are compression waves of 2◦ strength each. Using the wave-field method, calculate:

(a) Mach number in field #₂, M₂

(b) Mach number in field number 3, M₃

(c) The slope of the wave AD

(d) The slope of the wave BD.