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LES with acoustics and PSI for deforming plates in gas flow

Nilsson, Per LU ; Lillberg, Eric and Wikstrom, Niklas (2012) In Nuclear Engineering and Design 253. p.387-395
Abstract
This concerns Flow Induced Vibrations (Fly) in nuclear reactors and numerical analysis of such. Special attention is paid to structural excitation by sound generated remotely and turbulent flow around the structure. One hypothesis was that these phenomena can interact, so that the structure accumulates more energy from the flow if it also excited by sound from another source. In the studies, Fluid Structure Interaction (PSI) is simulated with Large Eddy Simulations (LESs). It is shown possible to simulate excitation due to both acoustic and turbulence loads using the reported methods, at least qualitatively. The excitation levels are even of the right order of magnitude in some parts. However, there are some shortcomings in the modeling.... (More)
This concerns Flow Induced Vibrations (Fly) in nuclear reactors and numerical analysis of such. Special attention is paid to structural excitation by sound generated remotely and turbulent flow around the structure. One hypothesis was that these phenomena can interact, so that the structure accumulates more energy from the flow if it also excited by sound from another source. In the studies, Fluid Structure Interaction (PSI) is simulated with Large Eddy Simulations (LESs). It is shown possible to simulate excitation due to both acoustic and turbulence loads using the reported methods, at least qualitatively. The excitation levels are even of the right order of magnitude in some parts. However, there are some shortcomings in the modeling. The most important is perhaps the lack of non-reflecting boundary conditions. Another problem is the strong numerical damping in combination with demanding numerics for the selected solid solution methodology. Three cases are simulated, two for validation and one applied about steam dryers. For the applied case, it is concluded unlikely that excitation by the acoustic and turbulence loads can interact. The main reason is that the flow is controlled more by static geometrical factors, such as solid rotation sharp edges, than small deformations due to vibrations. (C) 2012 Published by Elsevier B.V. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Nuclear Engineering and Design
volume
253
pages
387 - 395
publisher
Elsevier
external identifiers
  • wos:000314375700038
  • scopus:84873404879
ISSN
1872-759X
DOI
10.1016/j.nucengdes.2011.10.071
language
English
LU publication?
yes
id
218eda07-2961-46a5-acd5-ae32988cb06a (old id 3568119)
date added to LUP
2013-03-25 12:57:45
date last changed
2017-01-01 03:05:09
@article{218eda07-2961-46a5-acd5-ae32988cb06a,
  abstract     = {This concerns Flow Induced Vibrations (Fly) in nuclear reactors and numerical analysis of such. Special attention is paid to structural excitation by sound generated remotely and turbulent flow around the structure. One hypothesis was that these phenomena can interact, so that the structure accumulates more energy from the flow if it also excited by sound from another source. In the studies, Fluid Structure Interaction (PSI) is simulated with Large Eddy Simulations (LESs). It is shown possible to simulate excitation due to both acoustic and turbulence loads using the reported methods, at least qualitatively. The excitation levels are even of the right order of magnitude in some parts. However, there are some shortcomings in the modeling. The most important is perhaps the lack of non-reflecting boundary conditions. Another problem is the strong numerical damping in combination with demanding numerics for the selected solid solution methodology. Three cases are simulated, two for validation and one applied about steam dryers. For the applied case, it is concluded unlikely that excitation by the acoustic and turbulence loads can interact. The main reason is that the flow is controlled more by static geometrical factors, such as solid rotation sharp edges, than small deformations due to vibrations. (C) 2012 Published by Elsevier B.V.},
  author       = {Nilsson, Per and Lillberg, Eric and Wikstrom, Niklas},
  issn         = {1872-759X},
  language     = {eng},
  pages        = {387--395},
  publisher    = {Elsevier},
  series       = {Nuclear Engineering and Design},
  title        = {LES with acoustics and PSI for deforming plates in gas flow},
  url          = {http://dx.doi.org/10.1016/j.nucengdes.2011.10.071},
  volume       = {253},
  year         = {2012},
}