I just read a paper from Antony Jameson published in Progress in Aerospace Sciences 47 (2011) 308–318, http://www.sciencedirect.com/science/article/pii/S0376042111000029
He discussed CFD simulations of the Korn airfoil, and stated that some numerical methods failed to give a shock free solution. I am really impressed by Jameson's work, he did a mesh convergence study of this problem (Mach=0.75, CL=0.629) and give a new shock-free cruising condition (Mach=0.751, CL=0.625).
I tested this case with my own codes and failed. I would like to know from other CFDers, whether your code can produce the shock-free solution. Is there some important factors I need to pay attention? e.g. accurate treatment of the solid boundary condition? point-vortex at the far field? etc.
Hello,
Jameson did a numerical optimization using adjoint method. So this means he modified the original airfoil which is not shock-free at these conditions, so the results you obtain may be fine. See Harbeck, Michael, and Antony Jameson. "Exploring the limits of shock-free transonic airfoil design." AIAA 43rd aerospace sciences meeting and exhibition. 2005.
Regards
François
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