Experimental Checks on the Stability of a Cylinder in the Wake of Another.

This paper presents the results of an experimental investigation carried out in a wind tunnel to assess the validity of an analytical model which involves wide fields of instability for any cylinder elastically-suspended in the wake of another. After a description of the measurement methods used and of the data processing technique employed, the results of the experiments and calculation are compared. An extension of the model is proposed, making it possible to eliminate the discrepancies noticed regarding the quantity of energy introduced by the wind.