Cp at stagnation point too high

Andy

Hello,

I am calculating an incompressible air flow (V,free=36 m/sec at T=0°C) for a blunt body. Using SST-turbulence model and SBF=1 (i.e. kinda maximum accuracy) I am getting a maximum pressure coefficient of Cp=1.06 and a range of 1.07>Cp>-1.6.

Theory however predicts that the maximum stagnation pressure surplus in incompressible flow cannot exceed the dynamic pressure, i.e. CPmax=1. Has anyone made the same observations and knows maybe what to do in order to fix that?

Secondly my concrete issue is now that I have to setup the sensors for the experiments. The question is if the CP-scale is shifted in general that is the minimum CP is more like -1.7 or is only the maximum value affected and the suction zones are predicted correctly?

Thanks Andy