2.6 



o o 



I- LL 



U- 



O LU 



2 O 



< C3 



QC < 

 m £ 



> Q 



u. 



O 



o 



CROSS FLOW OSCILLATIONS 



CD/CDO = ''-0+1-''6(Wr-1) 



1.2 1.4 1.6 1.8 2.0 2.2 



WAKE RESPONSE PARAMETER, w^ = (1 + 2Y/D) (V^ St) 



2.4 



1 



2.6 



Figure 2.9 The ratio of the steady drag coefficient C^ due to vortex-excited cross flow oscillations and the 

 steady drag coefficient Cpg on a stationary circular cylinder plotted against the wake response parameter w,. 

 Here 2Y/Dis the peak-to-peak displacement amplitude (D is the diameter of the cylinder), V, is the reduced 

 velocity and St is the Strouhal number. 



34 



