LES and experimental studies of cold and reacting flow in a swirled partially premixed burner with and without fuel modulation

Journal Article · Sun Jul 15 04:00:00 EDT 2007 · Combustion and Flame

DOI:https://doi.org/10.1016/J.COMBUSTFLAME.2007.02.009· OSTI ID:20919410

Sengissen, A X ^[1]; Van Kampen, J F; Huls, R A; Stoffels, G G.M.; Kok, J B.W. ^[2]; Poinsot, T J ^[1]

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1. CERFACS, 42 Avenue G. Coriolis, 31057 Toulouse cedex (France)
2. University of Twente, Faculty of Engineering, 7500 AE Enschede (Netherlands)

In devices where air and fuel are injected separately, combustion processes are influenced by oscillations of the air flow rate but may also be sensitive to fluctuations of the fuel flow rate entering the chamber. This paper describes a joint experimental and numerical study of the mechanisms controlling the response of a swirled complex-geometry combustor burning natural gas and air. The flow is first characterized without combustion and LDV results are compared to large eddy simulation (LES) data. The nonpulsated reacting regime is then studied and characterized in terms of the heat release field. Finally the fuel flow rate is pulsated at several amplitudes and the response of the chamber is analyzed using phase-locked averaging and acoustic analysis. Results show that LES and acoustic analysis predict the flame dynamics in this complex configuration with accuracy when heat losses (radiation and convection) are accounted for. (author)

• OSTI ID: 20919410
• Journal Information: Combustion and Flame, Journal Name: Combustion and Flame Journal Issue: 1-2 Vol. 150; ISSN CBFMAO; ISSN 0010-2180
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
42 ENGINEERING
ACCURACY
AIR
AIR FLOW
BURNERS
COMBUSTION
COMBUSTION KINETICS
COMBUSTORS
CONVECTION
FLAMES
FLOW RATE
FLUCTUATIONS
FUELS
GAS TURBINES
HEAT
MODULATION
NATURAL GAS
SIMULATION
TRANSFER FUNCTIONS