Swiatkowski, Bartosz

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  • Swiatkowski, Bartosz (5)
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Author's Bibliography

Mathematical modelling of swirl oxy-fuel burner flame characteristics

Jovanović, Rastko D.; Swiatkowski, Bartosz; Kakietek, Slawomir; Škobalj, Predrag D.; Lazović, Ivan; Cvetinović, Dejan

(2019)

TY  - JOUR
AU  - Jovanović, Rastko D.
AU  - Swiatkowski, Bartosz
AU  - Kakietek, Slawomir
AU  - Škobalj, Predrag D.
AU  - Lazović, Ivan
AU  - Cvetinović, Dejan
PY  - 2019
UR  - https://linkinghub.elsevier.com/retrieve/pii/S019689041930439X
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/8149
AB  - Oxy-fuel combustion is the most promising carbon capture and storage technology, which eliminates carbon dioxide emissions into the atmosphere and also decreases nitrogen oxides emissions thereby lowering global warming potential. In order to implement oxy-fuel combustion technology in full scale power plants, its costs, mainly connected with the amount of pure oxygen produced, must be lowered. The main hypothesis is that it is possible to maintain similar velocity and heat transfer distribution while maintaining stable and efficient burner operation during both combustion technologies modifying burner aerodynamics. Excess oxygen is chosen as a representative parameter of burner's performance and investigation is carried out for four different oxy-fuel burner oxygen excess ratios (λ: 0.8, 0.98, 1.07, and 1.24) together with reference air combustion case. This study suggests a workflow, based on semi-industrial experimental investigations and computational fluid dynamics model composed of advanced sub-models for different combustion phases for development of real scale dual-mode coal swirl burners able for efficient operation during both combustion regimes. The results show that the temperature in near-burner zone and nitrogen oxides emissions increase, while carbon monoxide emissions decrease with the increase of burner oxygen excess ratio, and stable combustion with similar velocity and temperature distributions for both combustion modes is achieved for oxygen excess ratio of 1.07, with decrease in nitrogen oxides and carbon monoxide emissions during oxy-fuel combustion. The performed study demonstrates that it is possible to choose the appropriate burner settings regarding nitrogen oxides and carbon monoxide emissions and burner's ability to operate stably in both air and oxy-fuel combustion modes. © 2019 Elsevier Ltd
T2  - Energy Conversion and Management
T1  - Mathematical modelling of swirl oxy-fuel burner flame characteristics
VL  - 191
SP  - 193
EP  - 207
DO  - 10.1016/j.enconman.2019.04.027
ER  - 
@article{
author = "Jovanović, Rastko D. and Swiatkowski, Bartosz and Kakietek, Slawomir and Škobalj, Predrag D. and Lazović, Ivan and Cvetinović, Dejan",
year = "2019",
abstract = "Oxy-fuel combustion is the most promising carbon capture and storage technology, which eliminates carbon dioxide emissions into the atmosphere and also decreases nitrogen oxides emissions thereby lowering global warming potential. In order to implement oxy-fuel combustion technology in full scale power plants, its costs, mainly connected with the amount of pure oxygen produced, must be lowered. The main hypothesis is that it is possible to maintain similar velocity and heat transfer distribution while maintaining stable and efficient burner operation during both combustion technologies modifying burner aerodynamics. Excess oxygen is chosen as a representative parameter of burner's performance and investigation is carried out for four different oxy-fuel burner oxygen excess ratios (λ: 0.8, 0.98, 1.07, and 1.24) together with reference air combustion case. This study suggests a workflow, based on semi-industrial experimental investigations and computational fluid dynamics model composed of advanced sub-models for different combustion phases for development of real scale dual-mode coal swirl burners able for efficient operation during both combustion regimes. The results show that the temperature in near-burner zone and nitrogen oxides emissions increase, while carbon monoxide emissions decrease with the increase of burner oxygen excess ratio, and stable combustion with similar velocity and temperature distributions for both combustion modes is achieved for oxygen excess ratio of 1.07, with decrease in nitrogen oxides and carbon monoxide emissions during oxy-fuel combustion. The performed study demonstrates that it is possible to choose the appropriate burner settings regarding nitrogen oxides and carbon monoxide emissions and burner's ability to operate stably in both air and oxy-fuel combustion modes. © 2019 Elsevier Ltd",
journal = "Energy Conversion and Management",
title = "Mathematical modelling of swirl oxy-fuel burner flame characteristics",
volume = "191",
pages = "193-207",
doi = "10.1016/j.enconman.2019.04.027"
}
Jovanović, R. D., Swiatkowski, B., Kakietek, S., Škobalj, P. D., Lazović, I.,& Cvetinović, D.. (2019). Mathematical modelling of swirl oxy-fuel burner flame characteristics. in Energy Conversion and Management, 191, 193-207.
https://doi.org/10.1016/j.enconman.2019.04.027
Jovanović RD, Swiatkowski B, Kakietek S, Škobalj PD, Lazović I, Cvetinović D. Mathematical modelling of swirl oxy-fuel burner flame characteristics. in Energy Conversion and Management. 2019;191:193-207.
doi:10.1016/j.enconman.2019.04.027 .
Jovanović, Rastko D., Swiatkowski, Bartosz, Kakietek, Slawomir, Škobalj, Predrag D., Lazović, Ivan, Cvetinović, Dejan, "Mathematical modelling of swirl oxy-fuel burner flame characteristics" in Energy Conversion and Management, 191 (2019):193-207,
https://doi.org/10.1016/j.enconman.2019.04.027 . .
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10

Experimental and Numerical Investigation of Flame Characteristics During Swirl Burner Operation under Conventional and Oxy-Fuel Conditions

Jovanović, Rastko D.; Strug, Krzysztof; Swiatkowski, Bartosz; Kakietek, Slawomir; Jagiello, Krzysztof; Cvetinović, Dejan

(2017)

TY  - JOUR
AU  - Jovanović, Rastko D.
AU  - Strug, Krzysztof
AU  - Swiatkowski, Bartosz
AU  - Kakietek, Slawomir
AU  - Jagiello, Krzysztof
AU  - Cvetinović, Dejan
PY  - 2017
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/1630
AB  - Oxy-fuel coal combustion, together with carbon capture and storage or utilization, is a set of technologies allowing to burn coal without emitting globe warming CO2. As it is expected that oxy-fuel combustion may be used for a retrofit of existing boilers, development of a novel oxy-burners is very important step. It is expected that these burners will be able to sustain stable flame in oxy-fuel conditions, but also, for start-up and emergency reasons, in conventional, air conditions. The most cost effective way of achieving dual-mode boilers is to introduce dual-mode burners. Numerical simulations allow investigation of new designs and technologies at a relatively low cost, but for the results to be trustworthy they need to be validated This paper proposes a workflow for design, modeling, and validation of dual-mode burners by combining experimental investigation and numerical simulations. Experiments are performed with semi-industrial scale burners in 0.5 MW, test facility for flame investigation. Novel CFD model based on ANSYS FLUENT solver, with special consideration of coal combustion process, especially regarding devolatilization, ignition, gaseous and surface reactions, NOx formation, and radiation was suggested The main model feature is its ability to simulate pulverized coal combustion under different combusting atmospheres, and thus is suitable for both air and oxy-fuel combustion simulations. Using the proposed methodology two designs of pulverized coal burners have been investigated both experimentally and numerically giving consistent results. The improved burner design proved to be a more flexible device, achieving stable ignition and combustion during both combustion regimes: conventional in air and oxy-fuel in a mixture of O-2 and CO2 (representing dry recycledflue gas with high CO2 content). The proposed framework is expected to be of use for further improvement of multi-mode pulverized fuel swirl burners but can be also used for independent designs evaluation.
T2  - Thermal Science
T1  - Experimental and Numerical Investigation of Flame Characteristics During Swirl Burner Operation under Conventional and Oxy-Fuel Conditions
VL  - 21
IS  - 3
SP  - 1463
EP  - 1477
DO  - 10.2298/TSCI161110325J
ER  - 
@article{
author = "Jovanović, Rastko D. and Strug, Krzysztof and Swiatkowski, Bartosz and Kakietek, Slawomir and Jagiello, Krzysztof and Cvetinović, Dejan",
year = "2017",
abstract = "Oxy-fuel coal combustion, together with carbon capture and storage or utilization, is a set of technologies allowing to burn coal without emitting globe warming CO2. As it is expected that oxy-fuel combustion may be used for a retrofit of existing boilers, development of a novel oxy-burners is very important step. It is expected that these burners will be able to sustain stable flame in oxy-fuel conditions, but also, for start-up and emergency reasons, in conventional, air conditions. The most cost effective way of achieving dual-mode boilers is to introduce dual-mode burners. Numerical simulations allow investigation of new designs and technologies at a relatively low cost, but for the results to be trustworthy they need to be validated This paper proposes a workflow for design, modeling, and validation of dual-mode burners by combining experimental investigation and numerical simulations. Experiments are performed with semi-industrial scale burners in 0.5 MW, test facility for flame investigation. Novel CFD model based on ANSYS FLUENT solver, with special consideration of coal combustion process, especially regarding devolatilization, ignition, gaseous and surface reactions, NOx formation, and radiation was suggested The main model feature is its ability to simulate pulverized coal combustion under different combusting atmospheres, and thus is suitable for both air and oxy-fuel combustion simulations. Using the proposed methodology two designs of pulverized coal burners have been investigated both experimentally and numerically giving consistent results. The improved burner design proved to be a more flexible device, achieving stable ignition and combustion during both combustion regimes: conventional in air and oxy-fuel in a mixture of O-2 and CO2 (representing dry recycledflue gas with high CO2 content). The proposed framework is expected to be of use for further improvement of multi-mode pulverized fuel swirl burners but can be also used for independent designs evaluation.",
journal = "Thermal Science",
title = "Experimental and Numerical Investigation of Flame Characteristics During Swirl Burner Operation under Conventional and Oxy-Fuel Conditions",
volume = "21",
number = "3",
pages = "1463-1477",
doi = "10.2298/TSCI161110325J"
}
Jovanović, R. D., Strug, K., Swiatkowski, B., Kakietek, S., Jagiello, K.,& Cvetinović, D.. (2017). Experimental and Numerical Investigation of Flame Characteristics During Swirl Burner Operation under Conventional and Oxy-Fuel Conditions. in Thermal Science, 21(3), 1463-1477.
https://doi.org/10.2298/TSCI161110325J
Jovanović RD, Strug K, Swiatkowski B, Kakietek S, Jagiello K, Cvetinović D. Experimental and Numerical Investigation of Flame Characteristics During Swirl Burner Operation under Conventional and Oxy-Fuel Conditions. in Thermal Science. 2017;21(3):1463-1477.
doi:10.2298/TSCI161110325J .
Jovanović, Rastko D., Strug, Krzysztof, Swiatkowski, Bartosz, Kakietek, Slawomir, Jagiello, Krzysztof, Cvetinović, Dejan, "Experimental and Numerical Investigation of Flame Characteristics During Swirl Burner Operation under Conventional and Oxy-Fuel Conditions" in Thermal Science, 21, no. 3 (2017):1463-1477,
https://doi.org/10.2298/TSCI161110325J . .
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Numerical investigation of pulverized coal jet flame characteristics under different oxy-fuel conditions

Jovanović, Rastko D.; Rasuo, Basko; Stefanović, Predrag Lj.; Cvetinović, Dejan; Swiatkowski, Bartosz

(2013)

TY  - JOUR
AU  - Jovanović, Rastko D.
AU  - Rasuo, Basko
AU  - Stefanović, Predrag Lj.
AU  - Cvetinović, Dejan
AU  - Swiatkowski, Bartosz
PY  - 2013
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/5311
AB  - Pulverized coal combustion in mixture of oxygen and recycled flue gasses, known as oxy-fuel combustion, is considered as one of the several possible alternatives to conventional pulverized coal combustion. Switching from conventional pulverized-coal combustion to oxy-fuel combustion brings significant changes in flame properties among which the most important are ignition properties and flame stability. This paper presents the results of experimental and numerical analysis of ignition phenomena under O-2/CO2 mixtures with different oxygen content. The main focus of the presented paper is to suggest novel ignition sub-model which can describe all possible ignition mechanisms. Proposed ignition sub-model together with Large Eddy Simulation (LES) turbulence modeling enables accurate prediction of main flame characteristics: ignition point position, ignition temperature, and flame stability. (C) 2012 Elsevier Ltd. All rights reserved.
T2  - International Journal of Heat and Mass Transfer
T1  - Numerical investigation of pulverized coal jet flame characteristics under different oxy-fuel conditions
VL  - 58
IS  - 1-2
SP  - 654
EP  - 662
DO  - 10.1016/j.ijheatmasstransfer.2012.11.070
ER  - 
@article{
author = "Jovanović, Rastko D. and Rasuo, Basko and Stefanović, Predrag Lj. and Cvetinović, Dejan and Swiatkowski, Bartosz",
year = "2013",
abstract = "Pulverized coal combustion in mixture of oxygen and recycled flue gasses, known as oxy-fuel combustion, is considered as one of the several possible alternatives to conventional pulverized coal combustion. Switching from conventional pulverized-coal combustion to oxy-fuel combustion brings significant changes in flame properties among which the most important are ignition properties and flame stability. This paper presents the results of experimental and numerical analysis of ignition phenomena under O-2/CO2 mixtures with different oxygen content. The main focus of the presented paper is to suggest novel ignition sub-model which can describe all possible ignition mechanisms. Proposed ignition sub-model together with Large Eddy Simulation (LES) turbulence modeling enables accurate prediction of main flame characteristics: ignition point position, ignition temperature, and flame stability. (C) 2012 Elsevier Ltd. All rights reserved.",
journal = "International Journal of Heat and Mass Transfer",
title = "Numerical investigation of pulverized coal jet flame characteristics under different oxy-fuel conditions",
volume = "58",
number = "1-2",
pages = "654-662",
doi = "10.1016/j.ijheatmasstransfer.2012.11.070"
}
Jovanović, R. D., Rasuo, B., Stefanović, P. Lj., Cvetinović, D.,& Swiatkowski, B.. (2013). Numerical investigation of pulverized coal jet flame characteristics under different oxy-fuel conditions. in International Journal of Heat and Mass Transfer, 58(1-2), 654-662.
https://doi.org/10.1016/j.ijheatmasstransfer.2012.11.070
Jovanović RD, Rasuo B, Stefanović PL, Cvetinović D, Swiatkowski B. Numerical investigation of pulverized coal jet flame characteristics under different oxy-fuel conditions. in International Journal of Heat and Mass Transfer. 2013;58(1-2):654-662.
doi:10.1016/j.ijheatmasstransfer.2012.11.070 .
Jovanović, Rastko D., Rasuo, Basko, Stefanović, Predrag Lj., Cvetinović, Dejan, Swiatkowski, Bartosz, "Numerical investigation of pulverized coal jet flame characteristics under different oxy-fuel conditions" in International Journal of Heat and Mass Transfer, 58, no. 1-2 (2013):654-662,
https://doi.org/10.1016/j.ijheatmasstransfer.2012.11.070 . .
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Sensitivity analysis of different devolatilisation models on predicting ignition point position during pulverized coal combustion in O-2/N-2 and O-2/CO2 atmospheres

Jovanović, Rastko D.; Milewska, Aleksandra; Swiatkowski, Bartosz; Goanta, Adrian; Spliethoff, Hartmut

(2012)

TY  - JOUR
AU  - Jovanović, Rastko D.
AU  - Milewska, Aleksandra
AU  - Swiatkowski, Bartosz
AU  - Goanta, Adrian
AU  - Spliethoff, Hartmut
PY  - 2012
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/6975
AB  - Oxy-fuel combustion is considered as a promising solution to reduce greenhouse-gases and pollutant emissions. The main advantage of oxy-fuel combustion over other technologies for pollution reduction from pulverized coal combustion is that it can be applied to the existing coal-fired power plants. However, switching from conventional to oxy-fired coal combustion brings significant challenges. One of the most important is change of pulverized coal ignition characteristics. This paper presents the results of experimental and numerical analysis of ignition phenomena under oxy-fuel conditions. The main focus of the presented paper is to evaluate the effectiveness of the mathematical devolatilisation sub-model, in predicting the ignition point of pulverized coal flames under oxy-firing conditions. Regarding this, the performance of several devolatilisation models, from simple to more complex ones, in predicting ignition point position have been investigated. Numerically determined values of the ignition point position, and ignition temperature for various O-2-N-2 and O-2-CO2 conditions were compared with experimental data from the laboratory ignition test facility. Obtained results pointed out that network devolatilisation models (CPD and FG) give more accurate results in comparison with standard devolatilisation models (single rate and two competing rates). The best performance is achieved using FG devolatilisation model. Thus, newly implemented FG model will be used for future numerical simulations of oxy-fuel pulverized coal combustion on 0.5 MW pilot plant facility. (C) 2011 Elsevier Ltd. All rights reserved.
T2  - Fuel
T1  - Sensitivity analysis of different devolatilisation models on predicting ignition point position during pulverized coal combustion in O-2/N-2 and O-2/CO2 atmospheres
VL  - 101
SP  - 23
EP  - 37
DO  - 10.1016/j.fuel.2011.02.024
ER  - 
@article{
author = "Jovanović, Rastko D. and Milewska, Aleksandra and Swiatkowski, Bartosz and Goanta, Adrian and Spliethoff, Hartmut",
year = "2012",
abstract = "Oxy-fuel combustion is considered as a promising solution to reduce greenhouse-gases and pollutant emissions. The main advantage of oxy-fuel combustion over other technologies for pollution reduction from pulverized coal combustion is that it can be applied to the existing coal-fired power plants. However, switching from conventional to oxy-fired coal combustion brings significant challenges. One of the most important is change of pulverized coal ignition characteristics. This paper presents the results of experimental and numerical analysis of ignition phenomena under oxy-fuel conditions. The main focus of the presented paper is to evaluate the effectiveness of the mathematical devolatilisation sub-model, in predicting the ignition point of pulverized coal flames under oxy-firing conditions. Regarding this, the performance of several devolatilisation models, from simple to more complex ones, in predicting ignition point position have been investigated. Numerically determined values of the ignition point position, and ignition temperature for various O-2-N-2 and O-2-CO2 conditions were compared with experimental data from the laboratory ignition test facility. Obtained results pointed out that network devolatilisation models (CPD and FG) give more accurate results in comparison with standard devolatilisation models (single rate and two competing rates). The best performance is achieved using FG devolatilisation model. Thus, newly implemented FG model will be used for future numerical simulations of oxy-fuel pulverized coal combustion on 0.5 MW pilot plant facility. (C) 2011 Elsevier Ltd. All rights reserved.",
journal = "Fuel",
title = "Sensitivity analysis of different devolatilisation models on predicting ignition point position during pulverized coal combustion in O-2/N-2 and O-2/CO2 atmospheres",
volume = "101",
pages = "23-37",
doi = "10.1016/j.fuel.2011.02.024"
}
Jovanović, R. D., Milewska, A., Swiatkowski, B., Goanta, A.,& Spliethoff, H.. (2012). Sensitivity analysis of different devolatilisation models on predicting ignition point position during pulverized coal combustion in O-2/N-2 and O-2/CO2 atmospheres. in Fuel, 101, 23-37.
https://doi.org/10.1016/j.fuel.2011.02.024
Jovanović RD, Milewska A, Swiatkowski B, Goanta A, Spliethoff H. Sensitivity analysis of different devolatilisation models on predicting ignition point position during pulverized coal combustion in O-2/N-2 and O-2/CO2 atmospheres. in Fuel. 2012;101:23-37.
doi:10.1016/j.fuel.2011.02.024 .
Jovanović, Rastko D., Milewska, Aleksandra, Swiatkowski, Bartosz, Goanta, Adrian, Spliethoff, Hartmut, "Sensitivity analysis of different devolatilisation models on predicting ignition point position during pulverized coal combustion in O-2/N-2 and O-2/CO2 atmospheres" in Fuel, 101 (2012):23-37,
https://doi.org/10.1016/j.fuel.2011.02.024 . .
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Turbulent two-phase flow Modeling of air-coal mixture channels with single blade turbulators

Jovanović, Rastko D.; Swiatkowski, Bartosz; Cvetinović, Dejan; Stefanović, Predrag Lj.; Marković, Zoran M.; Pavlović, Zoran

(2007)

TY  - CONF
AU  - Jovanović, Rastko D.
AU  - Swiatkowski, Bartosz
AU  - Cvetinović, Dejan
AU  - Stefanović, Predrag Lj.
AU  - Marković, Zoran M.
AU  - Pavlović, Zoran
PY  - 2007
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/6703
AB  - The subject of this work is turbulent two-phase flow through air-coal channel(s) of complex geometry. The aim of this work is numerical optimization of fluid flow and coal particles distribution. A few proposed variants of the single blade turbulator, which has a role to increase turbulence in vertical section of air-coal mixture channel, were numerically investigated. More uniform coal particle distribution was achieved using single blade turbulators.
C3  - AIP Conference Proceedings
T1  - Turbulent two-phase flow Modeling of air-coal mixture channels with single blade turbulators
VL  - 936
SP  - 300
EP  - +
ER  - 
@conference{
author = "Jovanović, Rastko D. and Swiatkowski, Bartosz and Cvetinović, Dejan and Stefanović, Predrag Lj. and Marković, Zoran M. and Pavlović, Zoran",
year = "2007",
abstract = "The subject of this work is turbulent two-phase flow through air-coal channel(s) of complex geometry. The aim of this work is numerical optimization of fluid flow and coal particles distribution. A few proposed variants of the single blade turbulator, which has a role to increase turbulence in vertical section of air-coal mixture channel, were numerically investigated. More uniform coal particle distribution was achieved using single blade turbulators.",
journal = "AIP Conference Proceedings",
title = "Turbulent two-phase flow Modeling of air-coal mixture channels with single blade turbulators",
volume = "936",
pages = "300-+"
}
Jovanović, R. D., Swiatkowski, B., Cvetinović, D., Stefanović, P. Lj., Marković, Z. M.,& Pavlović, Z.. (2007). Turbulent two-phase flow Modeling of air-coal mixture channels with single blade turbulators. in AIP Conference Proceedings, 936, 300-+.
Jovanović RD, Swiatkowski B, Cvetinović D, Stefanović PL, Marković ZM, Pavlović Z. Turbulent two-phase flow Modeling of air-coal mixture channels with single blade turbulators. in AIP Conference Proceedings. 2007;936:300-+..
Jovanović, Rastko D., Swiatkowski, Bartosz, Cvetinović, Dejan, Stefanović, Predrag Lj., Marković, Zoran M., Pavlović, Zoran, "Turbulent two-phase flow Modeling of air-coal mixture channels with single blade turbulators" in AIP Conference Proceedings, 936 (2007):300-+.
2