the relation of Re & Cd of compressible cylinder?
 

dear

i want to find the reference about the relationship between the Re number and drag coefficient Cd of cylinder in compressible fluid. some results of incompressible were found, both experiments and computation. i make the cfd code and want to validate it. so i run the cylinder sample of Re=3900,Ma=0.2, but the pressure coefficient at front stagnate point is 1.2 ! is it right? thanks for your help!