A study on the fluid-elastic instability of a row of tubes in a crossflow.

A numerical study on the fluid-elastic instability of a row of tubes in a crossflow is presented. The flow between tubes was considered to be a leakage flow and the theory of leakage flow-induced vibraion, recently published, was employed to obtain the steady and unsteady fluid forces acting on the tubes. In spite of a few hypotheses made in the calculations, the results obtained agree with the experimental results which have been published. The method proposed here is one possibile means of calculating the fluid dynamic forces without experimental data.