Question

Which of these steps is not involved in method of characteristics for supersonic nozzle design?

(a) Determining characteristic lines

(b) Determining compatibility equations for characteristic line

(c) Solving compatibility equation point by point

(d) Neglect the internal points

I got this question in exam.

My question comes from Supersonic Nozzle Design topic in division Numerical Techniques for Nonlinear Supersonic Flow, Elements of Hypersonic Flow, Couette and Poiseuille Flow of Aerodynamics

Answer 1

The correct choice is (d) Neglect the internal points

To explain I would say: The method of characteristic is a three step procedure. The first step is to determine the characteristic lines. After this, we determine the compatibility equations based on whether the point is an internal or wall point, and finally, we solve for these equations point by point along the characteristic line.