in Tables 4 through 8, the Reynolds stress -u Wq is typically one order of magnitude 



less than the Reynolds stress -u v . An exception to this trend occurs for the 



angular location of 80 degrees, where measured values of -u Wq exceed the values of 



—f — v 



-u V . This is the region of predicted separation by the C K computer code. The 



—> — -^ 



measured distributions of -u Wq are not depicted graphically. 



X fc) 



The results given in Figures 9 through 13 and in Tables 4 through 8 indicate 



that u^ /U is the largest component of turbulent velocity fluctuation and that the 



normal component v /U is the smallest component. In addition, the fluctuations 

 are larger near the body's surface and reduce to values near zero as the edge of 

 the boundary layer is approached. At the body's surface, the no-slip boundary con- 

 dition requires the velocity and turbulent fluctuations to be zero, indicating that 

 a sharp gradient exists in the turbulent fluctuations at the wall. This gradient, 

 which becomes apparent in the measured data as the boundary layer thickens, is 



evident at all angular locations where x/L >^ 0.914. Similar trends have been noted 



12 ~~ 



by Huang et al. ' for axisymmetric bodies. 



The measured distributions of the Reynolds stress - 100 u v /U are also shown 



X n o 



in Figures 9 through 13. The maximum value of this component of Reynolds stress 

 generally occurs near the body wall showing little variation with location along the 

 model. When the boundary layer is thin, the spatial resolution of the "X" hot-film 

 probe may not be fine enough to measure precisely the Reynolds stress distributions 



near the wall. The maximum value of the -u v Reynolds stress occurs near the wall 



X n 



for all locations measured except x/L = 0.914 and 9 = 86 degrees. 



A turbulence structure parameter a,, where a, = u v /q and q = u^ + v + 

 1 Ixn X n 



^2 12 



Wq , was investigated by Huang et al, ' for axisjmimetric bodies. Huang's results 



for axisymmetric bodies showed that this parameter has a value of 0.16 for <^ n <_ 



0.6 6 and that the value of a decreases toward the edge of the boundary layer. 



The parameter 6 , used to normalize the distance from the model n , is defined as 



the distance from the wall surface in the n direction at which the measured tur- 



e 



72" 

 bulent fluctuation u /U reaches the value 0.01. Figures 14a through 14d show the 



14 



