The Reduction of Skin Friction Drag 



ACKNOWLEDGMENTS 



Many of the ideas embodied in this paper have grown from, and benefitted 

 by, discussions with workers in the field; it is a pleasure to acknowledge this 

 necessarily rather diffuse debt, although I take full responsibility for the form 

 of the ideas as presented here. I am particularly grateful to my colleagues 

 Drs. Hoult and Margolis for numerous comments and suggestions. The bibli- 

 ography is not intended to be exhaustive, and represents a very personal selec- 

 tion from among those papers of which I was aware, and those which were 

 brought to my attention by workers in this area; for this latter I am grateful. 

 I am grateful to the author involved and to the Cambridge University Press and 

 the American Institute of Chemical Engineers for permission to reproduce fig- 

 ures two and six respectively. 



REFERENCES 



1. General 



Betchov, R. B. (1959), "Simplified Analysis of Boundary Layer Oscillation," 

 Rept. No. E529174, Douglas Aircraft Co. 



Betchov, R. B. (1960), "Thermal Agitation in Turbulence," STL/TR-60-0000 

 AE 279, Physical Research Lab., Space Technology Lab., Inc. 



Brown, W. B. (1955), "Extension of the Exact Solution of the Orr-Sommerfeld 

 Stability Equation to Reynolds Numbers of 4000," Northrop Corp., Norair Div., 

 R NAI-58-73 (BLC-78). 



Brown, W. B. (1959), "Numerical Calculation of the Stability of Cross- Flow 

 Profiles in Laminar Boundary Layers on a Rotating Disc and on a Sweptback 

 Wing and an Exact Calculation of the Stability of the Blasius Profile," Northrop 

 Corp., Norair Div., R NAl-59-5 (BLC-117). 



Granville, P. S. (1963), "Effect of Fluid Injection on Drag of Flat Plates at 

 High Reynolds Number," Inst. Shipbldg. Progress , V. 10, No. 101, p. 30-33, Jan. 

 1963. 



Gray, W. E. and Rullam, P. (1950), "Comparison of Flight and Tunnel Meas- 

 urements of Transition on a Highly Finished Wing (King Cobra) RAE TN 2383." 



Goertler, H. (1955), "Dreidimensionale Instabilitant der ebenen Staupunkt- 

 stroemung gegenueber wirbelartigen Stoerungen, 50 Jahre Grenzschichtfor- 

 schung ," (H. Goertler, W. Tollmien, ed.) Vieweg, Bravmschweig. p. 304. 



Goertler, H. and Witting, H. (1958), "Theorie der sekundaeren instabilitaet 

 der laminaren Grenzschichten, Boundary Layer Research ," (H. Goertler, ed.) 

 Springer-Verlag, Berlin, p. 77. 



221-249 O - 66 - 60 929 



