Papers for validation
 

Hello friends,
I am working on airfoil analysis,and finding the Cl,Cd values for S-series blade profile.Can anybody please suggest me some published work of results for blade S818 , S825 , S826 , S831 at low velocity (4,6,8,10,12, 15 m/s) at various angle of attack.
I am stuck with it for a month.