1.5 



1.0 



0.5 









\ 

 \ 



\ 

 \ 







^ 



■ — . 



>■ — , 



Figure 7 — Transverse 

 Correlation Function 



THE TRANSVERSE CORRELATION 



The transverse correlation was measured using the equipment of Figure 3 with the 

 wave analyzer omitted. The data are presented in Figure 7. Unfortunately, these data have 

 not been checked carefully since they were taken on the last day the wind tunnel was avail- 

 able for this work. Since we are not concerned here with the convection of a nearly frozen 

 pattern, the cross spectral densities were not investigated. For the purpose of a cross check, 

 however, it would have been valuable to have obtained these data. Another limitation of the 

 data is that its variation of speed was not checked because of limitations on experimental 

 time. 



REFERENCES 



1. Kraichnan, R.H., Journal Acoustical Society of America, Vol. 28, p. 378 (1956). 



2. Kraichnan, R.H., Journal Acoustical Society of America, Vol. 29, p. 65 (1957). 



3. Klebanoff, P.S. and Diehl, Z.W., National Advisory Committee for Aeronautics 

 Report 1110 (1952). 



4. Hilliard, J.K. and Fiala, W.T., Journal Acoustical Society of America, Vol. 29, p. 254 

 (1957). 



5. James, Nichols, and Phillips, "Theory of Servomechanisms," McGraw-Hill Book 

 Company, Inc., New York (1947) Chapter 6. 



6. Willmarth, W.W., Journal Acoustical Society of America, Vol. 28, p. 1048 (1956). 



7. Klebanoff, P.S., National Advisory Committee for Aeronautics Report 1247 (1955). 



12 



