Drag Reduction by Suction 



Fig. 5 - Stability limit Rg* vs shape parameter H 



Hence the problem is reduced to calculating the boundary layer growth over 

 the body and, at each location along the body, comparing Rs* to Rs*_..^ obtained 

 from Figs. 5 or 6. 



To do this, the Karman-Pohlhausen method modified to account for suction 

 at the walls was used. A brief outline of the method follows. 



The velocity profile is represented by a fourth order polynomial 



^1 



(4) 



1009 



221-249 O - 66 - 65 



