Overview of Numerical Methods for Predicting Flow-Induced Vibration and Wear of Heat-Exchanger Tubes

摘要

Practical interest in performing predictive analysis of vibration and wear risks of industrial tube bundles, e.g. in nuclear reactor heat exchangers, subjected to cross flow is broadly recognized. A predictive analysis of an heat-exchanger design against severe vibration and wear has to cope with experimental data on FIV and fretting wear, together with the use of analytical and numerical methods for predicting linear and nonlinear tube response. This paper describes a general approcah of the problem currently under development at C.E.A. Attention is especially paid to some key aspects of the numerical techniques, namely, the modelisation of flow-induced forcing functions and the modelisation of impact and sliding at tube-support gaps. These topics are exemplified by numerical results related to some typical situations including the case of random vibration induced by flow turbulence and fluid-elastic vibration. (ERA citation 12:026733)