Discussion
Match each term in List I with its definition in List II.
List I
A. Shock angle
B. Deflection angle
C. Mach angle
D. Detachment angle
List II
1. The turning the flow undergoes across an oblique shock
2. The inclination of the shock to the oncoming flow
3. The largest deflection an attached shock can produce
4. The inclination of a vanishingly weak wave to the flow
Select the correct match.
Answer: A
The shock angle and the deflection angle are the two variables the theta-beta-Mach relation connects for a given upstream Mach number. The Mach angle is the lower limit of the shock angle, and the detachment angle is the upper limit of the deflection, beyond which the shock stands off.
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