6 - 



E 

 o 



r; 3 



D 

 ^ 1 



CROSS FLOW OSCILLATIONS 



Y/D =0.50 



o"9 







REDUCED VELOCITY, V^^-j-r- 



In U 



-1 



_L 



5 : 



6 



Figure 2.3 The inertia coefficient C„/, at the vibration frequency plotted against the re- 

 duced velocity V, for Y/D = 0.5. The data are from Sarpkaya (12) and were measured 

 in water with uniform, steady fluid motion past a cylinder oscillating normal to the flow. 

 The coefficient C„^ was derived from the total unsteady transverse force. Lock-on oc- 

 curs near K, = 5. 



29 



