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Experimental and numerical study of the active control of jets inside combustion chambers; Etude experimentale et numerique du controle actif de jets dans des chambres de combustion

Abstract

Combustion instabilities occur when the flame heat release couples with the acoustic waves propagating in the combustion chamber. This phenomenon can lead to strong vibrations and noise but also, sometimes, to the complete combustion device failure. That is the reason why so many studies focus on the control of those instabilities. The method chosen in this study consists in an active control device (or set of actuators) having a strong effect on the mixing of the burner exhaust flow with the ambient fluid. The model configuration studied consists in a non reactive jet of air controlled by four small tangential secondary jets. Experiments have been carried out to optimize the control device geometry. The configuration identified as the most efficient, in terms of mixing enhancement, has been simulated through Large Eddy Simulations (LES). The objective of the numerical part of the present work is double. First, the numerical simulations provide a better understanding of the phenomena occurring when the control is on. Then, it is shown that LES can be considered as a tool to predict the effects of a control device on a flow. (author)
Authors:
Publication Date:
Dec 15, 2003
Product Type:
Thesis/Dissertation
Report Number:
FRNC-TH-6308
Reference Number:
RN06037460; TVI: 0603
Resource Relation:
Other Information: TH: These dynamique des fluides; 96 refs.
Subject:
42 ENGINEERING; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; COMBUSTION CHAMBERS; JETS; ACOUSTICS; COMBUSTION CONTROL; VORTEX FLOW; NOZZLES; ACTUATORS; FLOW RATE; NAVIER-STOKES EQUATIONS; COMPUTERIZED SIMULATION; FLOW MODELS; VISCOSITY; VELOCITY; INCLINATION; FLOW VISUALIZATION; REYNOLDS NUMBER; PRESSURE DROP; NITROGEN OXIDES; HOT WIRE ANEMOMETERS
OSTI ID:
20700002
Research Organizations:
Institut National Polytechnique, 31 - Toulouse (France)
Country of Origin:
France
Language:
French
Other Identifying Numbers:
TRN: FR0504124
Availability:
Commercial reproduction prohibited; OSTI as DE20700002
Submitting Site:
FR
Size:
189 pages
Announcement Date:
Apr 10, 2006

Citation Formats

Faivre, V. Experimental and numerical study of the active control of jets inside combustion chambers; Etude experimentale et numerique du controle actif de jets dans des chambres de combustion. France: N. p., 2003. Web.
Faivre, V. Experimental and numerical study of the active control of jets inside combustion chambers; Etude experimentale et numerique du controle actif de jets dans des chambres de combustion. France.
Faivre, V. 2003. "Experimental and numerical study of the active control of jets inside combustion chambers; Etude experimentale et numerique du controle actif de jets dans des chambres de combustion." France.
@misc{etde_20700002,
title = {Experimental and numerical study of the active control of jets inside combustion chambers; Etude experimentale et numerique du controle actif de jets dans des chambres de combustion}
author = {Faivre, V}
abstractNote = {Combustion instabilities occur when the flame heat release couples with the acoustic waves propagating in the combustion chamber. This phenomenon can lead to strong vibrations and noise but also, sometimes, to the complete combustion device failure. That is the reason why so many studies focus on the control of those instabilities. The method chosen in this study consists in an active control device (or set of actuators) having a strong effect on the mixing of the burner exhaust flow with the ambient fluid. The model configuration studied consists in a non reactive jet of air controlled by four small tangential secondary jets. Experiments have been carried out to optimize the control device geometry. The configuration identified as the most efficient, in terms of mixing enhancement, has been simulated through Large Eddy Simulations (LES). The objective of the numerical part of the present work is double. First, the numerical simulations provide a better understanding of the phenomena occurring when the control is on. Then, it is shown that LES can be considered as a tool to predict the effects of a control device on a flow. (author)}
place = {France}
year = {2003}
month = {Dec}
}