Unsteady Model for Transverse Fluid Elastic Instability of Heat Exchange Tube Bundle

Abstract EN

From the viewpoint of practical application, based on the unsteady analytical model for transverse fluid elastic instability of tube array proposed by Yetisir and the linear attenuation function introduced by Li Ming, a new explicit model based on nonsteady state “streamtube” hypothesis is proposed and solved using complex number method.

In the model, numerical integral is avoided and inappropriate aspects in Li Ming model are modified.

Using the model, the fluid elastic instability analysis of a single flexible tube is made.

The stability graphs for four typical types of tube array are plotted and contrasted with experimental results.

It is found that the current explicit model is effective in the analysis of transverse fluid elastic instability of tube bundle.