Help! Simulation of S Duct
 

I am simulating subsonic flow past M-2129 S Duct ( M = 0.21)....
I got the geometry from the Euler grid given the following link
http://www.grc.nasa.gov/WWW/wind/val...1/sduct01.html

As the grid given the link provided is a Euler grid I am not able to use the same grid for my viscous computations.
But the geometry extracted from the grid data is not accurate and as a result I am getting few aberrations in my Cp distribution...


Can someone provide me with accurate geometry?