# #Skin-Friction Measurements with Laser Oil-Flow Interferometer # CASE B'.S1/2 (off design conditions)* # for qualitative use only # # These case B' measurements should only be used qualitatively # #* Note: Some of the wall shear stress for case B was #obtained while the tunnel was running in an off design #condition (i.e., the boundary layer was 50% thicker due #to dirty inlet screens) and is denoted as case B'. #This data should be used qualitatively only, and #"should not" be used in conjunction with the Cp data or #the LDV data which was obtained using design conditions. # --------------------------------- # X(mm) X(in) Cfx Cfz 12.7 0.5 0.00115 0.0006 25.4 1.0 0.0010 0.00043 50.8 2.0 0.0009 0.00033 76.2 3.0 0.00086 0.00027 152.4 6.0 0.00068 0.00013 304.8 12.0 0.00060 0.00008