Fast infrared imaging for combustion stability analysis of industrial burners

Allouis, C.; Pagliara, R.; Saponaro, Alessandro

doi:10.1016/j.expthermflusci.2012.04.014

Cited by 22 publications

(8 citation statements)

References 8 publications

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“…The three investigated positions from IR imaging are presented in figure 3 by the black and white circles. These positions were chosen in base of the possible influence of the fluid dynamic parameters on the combustion process [10].…”

Section: Resultsmentioning

confidence: 99%

“…The investigations had two objectives: one to compare transducer and CH* results with those obtained with IR imaging analysis and to confirm the trend observed in ref [10]; and on another hand to localize spatially the humming phenomenon during the combustion providing thus a good tool for the optimization of the burner design.…”

Section: Fig3 Position Of Investigated Positions By Ir Image Analysmentioning

confidence: 99%

“…Usually, UV-Visible spectroscopy is used to obtain information on the flame structures. New available technology as Fast InfraRed Imaging (FAIRI) allows instabilities investigation in the 2-dimensions [9][10]. The objective of this paper is to test the capability of this technique based on fast infrared imaging in individuating the flame and fluid dynamic fluctuations and the eventual correlations between them.…”

Section: Introductionmentioning

confidence: 99%

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Identification and mapping of early thermoacoustic phenomena in gas turbine test rig

Allouis¹,

Ferrante²

2014

Proceedings of the 2014 International Conference on Quantitative InfraRed Thermography

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In this paper, an optical approach is tested to spatially characterize combustion fluctuations in a single burner atmospheric gas turbine test rig. The target of present investigation was to test two different techniques with the aim to characterize the thermoacoustic behavior of burners during combustion tests campaign. The analysis based on fast infrared imaging of flames, coupled with dynamic pressure transducers and photomultiplier measurements, has been elaborated on a 3 MW gas turbine test rig equipped with full scale burner tested in atmospheric conditions. The rig has been purposely designed to be tuned on acoustic frequencies detected in real gas turbine machine equipped with 24 burners and operating at 20 bar. In atmospheric test campaign the burner evidenced main oscillations at low frequencies around 82 Hz and 146 Hz. These frequencies have been recorded in real machine too. The technique allowed identifying these frequencies in the 2D dimensions under humming conditions. The developed tool has enabled to design a methodology for comparing different burners operating in different conditions from thermoacoustic point of view.

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Section: Resultsmentioning

confidence: 99%

Section: Fig3 Position Of Investigated Positions By Ir Image Analysmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Identification and mapping of early thermoacoustic phenomena in gas turbine test rig

Allouis¹,

Ferrante²

2014

Proceedings of the 2014 International Conference on Quantitative InfraRed Thermography

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“…The trends of these species can be considered as a marker of the combustion status as well as of LBO limit [17,18]. A high acquisition rate is crucial to analyze the dynamic phenomena typical of the lean flame [19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Pollutant Formation during the Occurrence of Flame Instabilities under Very-Lean Combustion Conditions in a Liquid-Fuel Burner

et al. 2017

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Recent advances in gas turbine combustor design are aimed at achieving low exhaust emissions, hence modern aircraft jet engines are designed with lean-burn combustion systems. In the present work, we report an experimental study on lean combustion in a liquid fuel burner, operated under a non-premixed (single point injection) regime that mimics the combustion in a modern aircraft engine. The flame behavior was investigated in proximity of the blow-out limit by an intensified high rate Charge-Coupled Device (CCD) camera equipped with different optical filters to selectively record single species chemiluminescence emissions (e.g., OH*, CH*). Analogous filters were also used in combination with photomultiplier (PMT) tubes. Furthermore this work investigates well-mixed lean low NO x combustion where mixing is good and generation of solid carbon particulate emissions should be very low. An analysis of pollutants such as fine particles and gaseous emissions was also performed. Particle number concentrations and size distributions were measured at the exhaust of the combustion chamber by two different particle size measuring instruments: a scanning mobility particle sizer (SMPS) and an Electrical Low Pressure Impactor (ELPI). NO x concentration measurements were performed by using a cross-flow modulation chemiluminescence detection system; CO concentration emissions were acquired with a Cross-flow modulation Non-dispersive infrared (NDIR) absorption method. All the measurements were completed by diagnostics of the fundamental combustor parameters. The results herein presented show that at very-lean conditions the emissions of both particulate matter and CO was found to increase most likely due to the occurrence of flame instabilities while the NO x were observed to reduce.

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“…There are only few publications on the scope of livestock waste and sewage sludge. Allouis et al [9] investigated the co-combustion of pelletized poultry manure waste with olive pomace in a 50 kW burner installed in a water-cooled fire-place. Whereas, Krugly et al [10] discussed burning of the sewage sludge pellets in a commercial 13 kW pellet boiler.…”

Section: Introductionmentioning

confidence: 99%

Technical and environmental performance of 10 kW understocker boiler during combustion of biomass and conventional fuels

2017

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Abstract. This paper treats about the impact fuels from biomass wastes and coal combustion on a small boiler operation and the emission of pollutants in this process. Tests were performed in laboratory conditions on a water boiler with retort furnace and the capacity of 10 kW. Fuels from sewage sludge and agriculture wastes (PBZ fuel) and a blend of coal with laying hens mature (CLHM) were taken into account. The results in emission changes of NOx, CO 2 , CO and SO 2 and operating parameters of the tested boiler during combustion were investigated. The obtained results were compared with corresponding results of flame coal (GFC). Combustion of the PBZ fuel turned out to be a stable process in the tested boiler but the thermal output has decreased in about 30% compared to coal combustion, while CO and NO x emission has increased. Similar effect was observed when 15% of the poultry litter was added to the coal. In this case thermal output has also decreased (in about 20%) and increase of CO and NOx emission was observed. As a conclusion, it can be stated that more effective control system with an adaptive air regulation and a modified heat exchanger could be useful in order to achieve the nominal power of the tested boiler.

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Fast infrared imaging for combustion stability analysis of industrial burners

Cited by 22 publications

References 8 publications

Identification and mapping of early thermoacoustic phenomena in gas turbine test rig

Identification and mapping of early thermoacoustic phenomena in gas turbine test rig

Pollutant Formation during the Occurrence of Flame Instabilities under Very-Lean Combustion Conditions in a Liquid-Fuel Burner

Technical and environmental performance of 10 kW understocker boiler during combustion of biomass and conventional fuels

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