

5.0 



4.0- 



3.0 



2.0 



1.0 



1.0 



* 



5.0 9.0 13.0 17.0 

 PROBE SEPARATION LENGTH, AZ/D 



21.0 



Figure 2.12 Distribution of displacemenl amplitude K/D, magnitude 

 of the spanwise correlation coefficient p^g, and the spectral content 

 of the vortex shedding at the vibration frequency /(C„) and at the 

 Strouhal frequency l](C^); from reference 23. The spanwise separa- 

 tion between the measuring probles is given by Az/D and the varia- 

 tion displacement amplitude by Y/D. Vibration frequency equal to 86 

 percent of the Strouhal frequency /j. Reynolds number = 610. 



37 



