+ 2 



2 

 c 

 max 



(10) 



:£_ = 



(r.+6 )/r 

 r max 



r„/r 

 max 



/ \ max 



(11) 



2 

 max 



(r„+6 )/r 

 r max 



r„/r 

 max 



1- t;^ TT^ 



(12) 



where U~ is the value of u at r = r_ + 6 = r_ + iir, sec a and n~ is the 

 6 X r 



value of boundary-layer thickness measured normal to the body surface. 

 The values of integral parameters derived from the measured axial velocity 

 profiles, u /Ur., are given in Table 4. Figure 8 shows the theoretical and 

 measured values of (radial) boundary-layer thickness 6 and the (radial) 

 displacement thickness 6 . The agreement between measured and computed 

 values of 6 and 6 is satisfactory. 



MEASURED TURBULENCE CHARACTERISTICS 

 The cross-wire probe was used to measure the turbulence character- 

 istics in the thick boundary layer. The measured Reynolds stresses and 

 the measured mean velocity profiles were used to obtain eddy viscosity and 

 mixing length. 



MEASURED REYNOLDS STRESSES 



The exchange of momentum in the turbulent mixing process is repre- 



r 2 2 



sented by the distribution of the Reynolds stresses -u'v', u' , v' , and 



2 2 2 2 

 w' where u' , v' , and w' are the turbulent fluctuations in the axial. 



34 



