Imperial College London
Alternate

ProfessorWilliamJones

Faculty of Engineering, Department of Mechanical Engineering

Professor
 
 
 
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Contact

 

+44 (0)20 7594 7037w.jones

 
 
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Assistant

 

Ms Fabienne Laperche +44 (0)20 7594 7033

 
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Location

 

607City and Guilds BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@inproceedings{Fredrich:2019,
author = {Fredrich, D and Jones, WP and Marquis, A},
pages = {1--12},
publisher = {The Combustion Institute},
title = {Thermo-acoustic instabilities in the PRECCINSTA combustor investigated using a compressible LES-pdf approach},
url = {http://hdl.handle.net/10044/1/84615},
year = {2019}
}
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RIS format (EndNote, RefMan)

TY  - CPAPER
AB  - This work predicts the evolution of self-excited thermo-acoustic instabilities in a gas turbine model combustor using large eddy simulation.  The developed flow solver is fully compressible and comprises a transported sub-grid probability density function approach in conjunction with the Eulerian stochastic fields method.  An unstable operating condition in the PREC-CINSTA test case involving flame oscillation driven by thermo-acoustic instabilities is the chosen  target  configuration.   Good  results  are  obtained  in  a  comparison  of  time-averaged flow  statistics  against  experimental  data.   The  flame’s  self-excited  oscillatory  behaviour  is successfully  captured  without  any  external  forcing  involved.   Power  spectral  density  analysis  of  the  oscillation  reveals  a  dominant  thermo-acoustic  mode  at  a  frequency  of  300  Hz providing  remarkable  agreement  with  experimental  observations.   Moreover,  the  predicted limit-cycle amplitude closely matches the experimental value obtained with rigid metal combustion chamber side walls.  Finally, a phase-resolved study of the oscillation cycle is carried out leading to a detailed description of the physical mechanism closing the feedback loop.
AU  - Fredrich,D
AU  - Jones,WP
AU  - Marquis,A
EP  - 12
PB  - The Combustion Institute
PY  - 2019///
SP  - 1
TI  - Thermo-acoustic instabilities in the PRECCINSTA combustor investigated using a compressible LES-pdf approach
UR  - http://hdl.handle.net/10044/1/84615
ER  -
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