Question

The ratio \(\frac {C_p}{τ^{2}}\) behind a shock wave is a function of which of these parameters?

(a) Hypersonic similarity parameter K and γ

(b) Angle of attack and wedge angle

(c) Coefficient of lift and wedge angle

(d) Hypersonic similarity parameter and angle of attack

This question was addressed to me in semester exam.

Question is taken from Hypersonic Similarity in chapter Transonic and Hypersonic Flows of Aerodynamics

Answer 1

The correct choice is (a) Hypersonic similarity parameter K and γ

Easy explanation: For the flow over a wedge having slenderness ratio τ has formation of oblique shock waves. The relation is given by:

\(\frac {C_p}{τ^{2}}\) = f(K,γ)

According to this, \(\frac {C_p}{τ^{2}}\) is a function of only gamma and the hypersonic similarity parameter.