Question

What is modified Newtonian pressure law?

(a) Cp = Cp max sin^2 θ

(b) Cp = Cp max sin θ

(c) Cp = Cp max cos^2 θ

(d) Cp = Cp max cos θ

I got this question in an interview.

I'd like to ask this question from Newtonian Theory topic in section Numerical Techniques for Nonlinear Supersonic Flow, Elements of Hypersonic Flow, Couette and Poiseuille Flow of Aerodynamics

Answer 1

Right answer is (a) Cp = Cp max sin^2 θ

The best I can explain: Lester Lees proposed modified Newtonian pressure law for blunt surfaces at hypersonic flow. According to the modified formula, coefficient 2 in Newtonian theory is replaced with Cp max. The maximum pressure over a blunt body arises at the stagnation point.