THEORETICAL EXPERIMENTAL 



cir/r„3, A 



Figure 8 



Comparison of Measured and Computed Boundary Layer 

 and Displacement Thickness Parameters 



is defined as the normal distance from the body where the nondimensionalized 

 tangential velocity u /U has a value of 0.995. In this definition, u is 

 the dimensional tangential velocity and U is the dimensional local 

 tangential velocity calculated by the potential flow program using the 

 latest body-wake displacement model. 



The measured value of the boundary layer thickness 6 is a difficult 

 value to obtain. This variable is defined as the radial position where 



Reynolds stress u'v' becomes "small." The overall accuracy of the measured 

 •^ X r ■' 



values of 6 presented in the present investigation is estimated to be 

 about 10 percent. 



The integral parameters of interest are: 



(r„+6 )/r 

 r max 



r^/r 

 max 



(8) 



2 

 r 

 max 



(r„+6 )/r 

 r max 



r /r 

 max 



'-t 



(9) 



33 



