Question

Two bodies holding hypersonic similarity at small angle of attack need the values of γ and M∞τ to be same.

(a) True

(b) False

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This question is from Hypersonic Similarity topic in chapter Transonic and Hypersonic Flows of Aerodynamics

Answer 1

Right choice is (b) False

Explanation: For two bodies at hypersonic regime at very small angle of attack, apart from product of Mach number and slenderness ratio M∞τ and the value of gamma γ, there is one more condition to be met to have similar dynamic flow. That condition is that the ratio of angle of attack to slenderness ratio (α/τ) should be same.