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

@article{Fredrich:2020:10.1007/s10494-020-00177-3,
author = {Fredrich, D and Jones, WP and Marquis, AJ},
doi = {10.1007/s10494-020-00177-3},
journal = {Flow, Turbulence and Combustion},
pages = {1399--1415},
title = {Thermo-acoustic Instabilities in the PRECCINSTA combustor investigated using a compressible LES-pdfApproach},
url = {http://dx.doi.org/10.1007/s10494-020-00177-3},
volume = {106},
year = {2020}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - This work predicts the evolution of self-excited thermo-acoustic instabilities in a gas turbine model combustor using large eddy simulation. The applied 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 PRECCINSTA test case—known to exhibit strong flame oscillations driven by thermo-acoustic instabilities—is the chosen target configuration. Good results are obtained in a comparison of time-averaged flow statistics against available measurement data. The flame’s self-excited oscillatory behaviour is successfully captured without any external forcing. Power spectral density analysis of the oscillation reveals a dominant thermo-acoustic mode at a frequency of 300 Hz; providing remarkable agreement with previous experimental observations. Moreover, the predicted limit-cycle amplitude is found to closely match its respective measured value obtained from experiments 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 mechanisms that sustain the closed feedback loop.
AU  - Fredrich,D
AU  - Jones,WP
AU  - Marquis,AJ
DO  - 10.1007/s10494-020-00177-3
EP  - 1415
PY  - 2020///
SN  - 0003-6994
SP  - 1399
TI  - Thermo-acoustic Instabilities in the PRECCINSTA combustor investigated using a compressible LES-pdfApproach
T2  - Flow, Turbulence and Combustion
UR  - http://dx.doi.org/10.1007/s10494-020-00177-3
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000539526000002&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - https://link.springer.com/article/10.1007%2Fs10494-020-00177-3
UR  - http://hdl.handle.net/10044/1/80451
VL  - 106
ER  -
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