ABSTRACT
It is well known that a tube bundle o f a heat ex changer sometimes vibrates in a cross-flow. Much research has been carried out on the problem over the past quarter-century, and many things have been found. These researches have been introduced in de tail in the literatures (Paidoussis 1983, Weaver & Fiztpatrick 1988, Price 1995). Price reviewed the pa pers and classified the theoretical model o f tube bun dle vibration as follows:
Jet switch models Quasi-static models Inviscid flow models Unsteady models Semi-analytical models Quasi-steady models Computational fluid dynamic models
The details o f each model were given in the lit erature. However, Price stated that the "unsteady model" is the most reliable model. The unsteady model is a method o f calculation using unsteady fluid dynamic forces that act on the vibrating tube bundle. This is physically the most accurate model because it does not include any approximation. However, there are several different sub-models in the unsteady model, and it has not been clarified which o f these methods is the most reasonable.
