1. Predicting turbulence-induced vibration in axial annular flow by means of large-eddy simulations
- Author
-
Jeroen De Ridder, Katrien Van Tichelen, Paul Schuurmans, Joris Degroote, and Jan Vierendeels
- Subjects
Technology and Engineering ,K-epsilon turbulence model ,02 engineering and technology ,01 natural sciences ,010305 fluids & plasmas ,Pipe flow ,WALL-PRESSURE-FLUCTUATIONS ,Physics::Fluid Dynamics ,Annular flow ,NUMBER-FREQUENCY SPECTRUM ,BOUNDARY-LAYER FLOW ,Axial flow ,0203 mechanical engineering ,PIPE-FLOW ,Turbulence-induced vibration ,0103 physical sciences ,Fluid dynamics ,FIELD ,CYLINDER ,Physics ,Computer simulation ,Turbulence ,Mechanical Engineering ,Turbulence modeling ,Large-eddy simulations ,Mechanics ,Vibration ,MODEL ,020303 mechanical engineering & transports ,Axial compressor ,NUMERICAL-SIMULATION - Abstract
Turbulence-induced vibration is typically considered as a type of vibration with one-way coupling between the fluid flow and the structural motion: the turbulence creates an incident force field on the structure, but the structural displacement does not influence the turbulence. It is however challenging to measure the turbulence forcing function experimentally. In this article, the forcing function in annular flow is computed by means of Large-eddy simulations. The pressure spectrum is applied to the inner cylinder and the resulting vibration is computed. It is shown that the commonly used multiplication hypothesis does not hold for the present results. The computed spectrum showed an upper limit to the coherence length. The results of these computations are compared to experimental results available in literature and to semi-empirical models. The predicted displacements compared well with experimental results.
- Published
- 2016