Modal Characteristics of a Flexible Tube in Turbulent Axial Flow: a Numerical Approach and Validation with Experimental Data

Research output: Contribution to report/book/conference proceedingsIn-proceedings paper

Authors

Documents & links

Abstract

Flow-induced vibration is an important concern in the design of tube bundles. Due to the coupling of fluid motion and structural motion, instabilities such as flutter and divergence can arise. Next to the instabilities caused by the coupling of fluid motion and structural motion, turbulence could cause small amplitude vibrations, which in turn could give rise to long-term damage. Currently, the dynamical behavior of a tube in axial flow is studied by splitting the flow forces into inviscid and viscous components. The inviscid flow forces are determined from potential flow theory while the viscous flow forces come from empirical formulations. In this paper, a computational methodology is proposed to improve the accuracy of the predicted dynamical behaviour. In this methodology partitioned fluid-structure interaction simulations are performed to calculate the free vibration decay of a tube in axial flow. The tube is initially deformed according to an eigenmode in vacuum. Modal characteristics are then derived from the free vibration decay of the tube surrounded by the turbulent water flow. To validate this computational methodology a series of experiments is reproduced. In these experiments the frequency and damping of the fundamental mode of a solid brass cylinder were measured.

Details

Original languageEnglish
Title of host publicationComputational Methods for Coupled Problems in Science and Engineering V
Place of PublicationSpain
Pages669-676
Publication statusPublished - Jun 2013
Event5th International Conference on Computational Methods for Coupled Problems in Science and Engineering - Santa Eulalia, Spain
Duration: 17 Jun 201319 Jun 2013

Conference

Conference5th International Conference on Computational Methods for Coupled Problems in Science and Engineering
CountrySpain
CitySanta Eulalia
Period2013-06-172013-06-19

Keywords

  • flow-induced vibration, modal characteristics, turbulent axial flow, numerical method

ID: 168183