Angles of Shock Waves

The compressible flow about an ogive with attached shock was investigated by Spencer (Ref 22a) 

Conditions behind shock waves were investigated by several scientists, among them Martin (Ref 22b), Jones (Ref 25), Armendt et al (Ref 37), Makino (Ref 37a) and others. Results of their work are described in Ref 52, pp 53-6 

Hornig (Refs 40 66c) discussed energy exchange in shock wave s 

Dunkle in private communication of Nov 1968 gave the following resume of Ref 66c  

The thickness of the compression zone is about 10 cm at atmospheric pressure thus the time for compression is about lO sec. Since the wave length of visible light is of this order of magnitude, the optical reflectivity method was developed. Experiments were carried out in which the angle of incidence on the shock front was kept constant, and the angle of observation varied. In the case of simple air shock 

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