Flame imaging on the ALSTOM EV-burner: thermo acoustic pulsations and CFD-validation

Guethe, Felix; Lachner, Rudolf; Schuermans, Bruno; Biagioli, Fernando; Geng, Weiqun; Inauen, Andreas; Schenker, Sabine; Bombach, Rolf; Hubschmid, W.

doi:10.2514/6.2006-437

Cited by 19 publications

(5 citation statements)

References 11 publications

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“…However, this limitation can be handled by adopting a proper flame front detection method, as is described in the following. Moreover, the utilization of laser-based techniques (LIF) for the OH in flame detection are well studied and accounted [16,[39][40][41][42][43][44][45][46][47][48]. Hence, all the results that are presented in the following will refer to OH-PLIF measurements.…”

Section: Oh-plif Measurementmentioning

confidence: 99%

Experimental Flame Front Characterisation in a Lean Premix Burner Operating with Syngas Simplified Model Fuel

Canepa

Nilberto

2019

Energies

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The recent growing attention to energy saving and environmental protection issues has brought attention to the possibility of exploiting syngas from gasification of biomass and coal for the firing of industrial plants included in the, so called, Integrated Gasification Combined Cycle power plants. In order to improve knowledge on the employ of syngas in lean premixed turbulent flames, a large scale swirl stabilized gas-turbine burner has been operated with a simplified model of H 2 enriched syngas from coal gasification. The experimental campaign has been performed at atmospheric pressure, with operating conditions derived from scaling the real gas turbines. The results are reported here and consist of OH-PLIF (OH Planar Laser Induced Fluorescence) measurements, carried out at decreasing equivalence of air/fuel ratio conditions and analysed together with the mean aerodynamic characterisation of the burner flow field in isothermal conditions obtained through LDV (Laser Doppler Velocimetry) and PIV (Particle Image Velocimetry) measurements. The OH concentration distributions have been analysed statistically in order to obtain information about the location of the most reactive zones, and an algorithm has been applied to the data in order to identify the flame fronts. In addition, the flame front locations have been successively interpreted statistically to obtain information about their main features and their dependence on the air to fuel ratio behaviour.to a standard diffusion flame. Unfortunately, such combustors are more susceptible to combustion instability and flashback [9]. If compared to natural gas, hydrogen-enriched syngas is characterized by a higher laminar burning velocity and higher mass diffusivity, which may lead to different interactions between the flow turbulence and the reaction chemistry in turbulent premixed flames, determining different flame characteristics from natural gas when employed in modern premixed-type combustors. Hence, due to the previously described increased interest, extensive studies of turbulent and premixed air/syngas combustion processed have recently become a great interest to the research community. Unfortunately, due to the properties of the H 2 -rich fuels, most of the studies about syngas combustion are operated with diffusion flames, e.g., [10][11][12][13][14][15], while in general a lower number of studies are present concerning lean premixed combustion experiments, e.g., [16][17][18][19][20][21][22][23], which was carried out exploiting different diagnostic techniques, such as OH Laser-Induced Fluorescence and Rayleigh thermography. To the best of author's knowledge, such a lack of data is evident when considering turbulent flames in real scale gas turbine geometries.In such a scenario, the work presented here has been carried out employing a prototypical swirl stabilized real scale burner (500 kW power output in atmospheric operations), which implements the main current concepts of lean premixed combustors for gas turbine operations. The burner has been tested whil...

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Section: Oh-plif Measurementmentioning

confidence: 99%

Experimental Flame Front Characterisation in a Lean Premix Burner Operating with Syngas Simplified Model Fuel

Canepa

Nilberto

2019

Energies

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“…Moreover, the utilization of laser-based techniques (LIF) for the OH in flame detection are well studied and accounted ( [16], [37]- [46]). Thence, all the results that will be presented in the following will refer to OH-PLIF measurements.…”

Section: Oh-plif Measurementmentioning

confidence: 99%

Experimental Flame Front Characterisation in a Lean Premix Burner Operating with Syngas Simplified Model

Canepa¹,

Nilberto²

2019

Preprint

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The recent growing attention to energy saving and environmental protection issues has brought to attention the possibility of exploiting syngas from gasification of biomass and coal for the firing of industrial plants included the so called Integrated Gasification Combined Cycle ones. In order to improve the knowledge about the employ of syngas in lean premixed turbulent flames, a large scale swirl stabilized gas-turbine burner has been operated with a simplified model of H2 enriched syngas from coal gasification. The experimental campaign has been performed at atmospheric pressure with operating conditions derived from scaling the real gas turbines ones. The results are here reported and consist of OH-PLIF measurements carried out at decreasing air equivalence ratio conditions and are analysed together with the mean aerodynamic characterisation of the burner flowfield in isothermal condition. The OH concentration distributions have been analysed statistically in order to obtain information about the location of the most reactive zones and an algorithm has been applied to the data in order to identify the flame fronts. In addition, the flame front locations have been successively interpreted statistically in order to obtain information about their main features and about their dependence on the air to fuel ratio behaviour.

show abstract

“…Moreover, the utilization of laser-based techniques (LIF) for the OH in flame detection are well studied and accounted ( [15], [35]- [44]). Thence, all the results that will be presented in the following will refer to OH-PLIF measurements.…”

Section: Oh-plif Measurementmentioning

confidence: 99%

Experimental Flame Front Characterisation in a Lean Premix Burner Operating at Syngas

Canepa¹,

Nilberto²

2018

Preprint

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The recent growing attention to energy saving and environmental protection issues has brought to attention the possibility of exploiting syngas from gasification of biomass and coal for the firing of industrial plants included the so called Integrated Gasification Combined Cycle ones. In order to acquire a detailed knowledge about the behaviour of lean turbulent premixed flames, the present work resent the results of an experimental characterisation of a prototypical gas turbine burner operated at atmospheric pressure at condition scaled from real gas turbines ones. The results here presented derive from OH-PLIF measurements carried out at decreasing air equivalence ratio conditions and are analysed together with a mean aerodynamic characterisation of the burner operating in isothermal condition. The OH concentration distributions have been analysed statistically in order to obtain information about the location of the most reactive zones and an algorithm has been applied to the data sets in order to identify the flame fronts. In addition, the flame front locations have been successively interpreted statistically in order to obtain information about their main features and about their dependence on the air to fuel ratio behaviour.

show abstract

Flame imaging on the ALSTOM EV-burner: thermo acoustic pulsations and CFD-validation

Cited by 19 publications

References 11 publications

Experimental Flame Front Characterisation in a Lean Premix Burner Operating with Syngas Simplified Model Fuel

Experimental Flame Front Characterisation in a Lean Premix Burner Operating with Syngas Simplified Model Fuel

Experimental Flame Front Characterisation in a Lean Premix Burner Operating with Syngas Simplified Model

Experimental Flame Front Characterisation in a Lean Premix Burner Operating at Syngas

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