Article
Thermodynamics
Vadim N. Kurdyumov, Daniel Fernandez-Galisteo, Carmen Jimenez
Summary: This paper investigates super-adiabatic premixed flames in an inert porous medium layer of finite length. A one-step Arrhenius kinetics model is used to describe the combustion process with consideration of density variations. The asymptotic case of large thermal conductivity ratio and high activation energy limit is explored and compared to finite parameter values. The flame sheet model is employed to obtain analytical steady-state solutions for parametric analysis. The phenomenon of multiplicity of steady-state solutions is investigated, and the critical parameter values for multiple solutions are determined. The stability of the solutions is examined through time-dependent simulations.
COMBUSTION AND FLAME
(2022)
Article
Energy & Fuels
V. Bubnovich, H. Hernandez, M. Toledo, C. Flores
Summary: Experimental investigation was conducted on combustion characteristics and flame stabilization within a two-layer porous media burner. The combustion wave propagation rate was found to increase with increased inlet velocity and decreased equivalence ratio. A porous burner with flame stabilized between two porous ceramics was successfully built, showing complete combustion with low CO and NOx emissions.
Article
Engineering, Environmental
Matias Fierro, Pablo Requena, Eugene Salgansky, Mario Toledo
Summary: Experimental investigation on a reverse flow porous medium reactor with different types of methane and oxidant flames for hydrogen and syngas production showed that separate supply of reactants allows for a higher H-2/CO ratio in the synthesis gas. Premixed flames exhibited good performance at phi = 2, while non-premixed flames achieved higher temperatures at phi = 2 and 3.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Energy & Fuels
Alexander Kirdyashkin, Ramil Gabbasov, Vladimir Kitler, Anatoly Maznoy
Summary: The development of new energy-efficient high-temperature sintering furnaces is crucial for reducing the cost of refractory ceramic manufacturing. Experimental analysis was conducted on a furnace filled with a packed bed of ceramic spheres and utilizing premixed combustion of natural gas with air and oxygen. It was found that the filtration combustion mode is effective for sintering smaller parts, while the jet-stabilized combustion mode is more suitable for sintering larger pieces within the packed bed.
Review
Chemistry, Physical
Peng Chen, Ting 'ao Shen, Yongliang Xie, Xin Su
Summary: Hydrogen energy is considered a promising energy source for the future, but safety issues must be addressed. This study numerically investigated the initial flame propagation characteristics of hydrogen spherical premixed flame at various initial temperature and radius. The results showed that the initial flame temperature and radius significantly influenced the self-sustained flame characteristics.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Engineering, Chemical
Jian Wang, Yanjie Li, Guilong Liu, Ligang Zheng, Rongkun Pan, Chang Lu, Yan Wang
Summary: During the study, it was found that re-ignition phenomenon occurs in the area upstream of the foam metal under certain conditions after extinguishing the flame. The study investigated the process and mechanism of this phenomenon. The results showed that flame extinguishment and re-ignition are highly dependent on the material and pore density of the porous media used. The incorporation of copper foam with high thermal conductivity resulted in the decay of flame propagation speed and increased overpressure after quenching with the increase of pore density of the first layer of iron-nickel foam.
JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES
(2023)
Article
Thermodynamics
Sangjukta Devi, Niranjan Sahoo, P. Muthukumar
Summary: The aim of this study is to compare the performance of a newly developed SFPRB with a conventional CB. The SFPRB showed higher thermal efficiency and lower pollutant emissions compared to the CB, making it a more efficient and cleaner burner for crude biogas application.
APPLIED THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Mingjian Liao, Zhu He, Shuyuan Jia, Xiong Liang, Tat Leung Chan, Yawei Li, Xuecheng Xu, Ting Liu
Summary: This paper discusses the advantages of the oxy-fuel porous media combustion technique and the differences in combustion behavior compared to air-fuel conditions. The study shows that the physical properties difference between CO2 and air is the main reason for the variation in combustion behaviors under oxy-fuel conditions. By adjusting the properties of the porous matrix, the velocity limit of stable combustion can be increased.
CASE STUDIES IN THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Jun Li, Hongcheng Xiao, Qingqing Li, Junrui Shi
Summary: The study aims to analyze heat fluxes in porous micro-combustors and discuss the effects of wall thermal conductivity and porous media properties on flame temperature. Results show that smaller porous micro-combustors have a higher proportion of heat recirculation relative to heat losses, and flame temperature is inversely related to the ratio of total heat losses to total heat recirculation.
Article
Thermodynamics
P-A Masset, O. Dounia, L. Selle
Summary: This paper proposes a classification method for porous media combustion based on the classical volume-averaged equations, and explains that the transition between different regions is driven by two dimensionless parameters.
COMBUSTION AND FLAME
(2022)
Article
Energy & Fuels
Zhe Wang, Changwei Ji, Du Wang, Ruifeng Hou, Tianyue Zhang, Shuofeng Wang
Summary: Adding dissociated ammonia can improve the combustion properties of NH3, but may slightly reduce combustion efficiency. Markstein length, heat release reactions, and NO formation are related to the dissociating degree under different conditions.
Article
Energy & Fuels
Jun Cheng, Bo Zhang
Summary: This study investigates the explosion characteristics and flame instability of ammonia-air/oxygen mixtures and provides fundamental research on the combustion characteristics, which can serve as an experimental reference for the development of chemical reaction mechanisms for ammonia combustion in oxygen-rich environments. The results also offer data support for the possibility of using ammonia fuel as a propellant for hypersonic vehicles in the future.
Article
Thermodynamics
Guillaume Vignat, Bassem Akoush, Edna R. Toro, Emeric Boigne, Matthias Ihme
Summary: The use of porous media burners (PMBs) to stabilize lean NH3/H2/air flames was investigated. Internal heat recirculation in PMBs preheats the reactants and increases the flame speed, leading to improved combustion stability. Experimental studies were conducted to determine the stability limits of porous media combustion, and it was found that the NH3/H2 ratio and mass flux rates have significant effects on combustion performance.
PROCEEDINGS OF THE COMBUSTION INSTITUTE
(2023)
Article
Energy & Fuels
Evans K. Quaye, Pan Jianfeng, Lu Qingbo, Yi Zhang, Wang Yu, Anthony Akurugo Alubokin
Summary: The study conducted a three-dimensional numerical and experimental investigation on methane-oxygen combustion in a small scale porous-media cylindrical combustor. The results indicate that porous media improves the thermal characteristics of the combustor, leading to more stable wall temperatures under certain conditions.
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION
(2021)
Article
Chemistry, Physical
Yongseok Choi, Kyu Tae Kim
Summary: To enable reliable lean-premixed gas turbine combustion with pure hydrogen or high hydrogen content fuels, multi-element injector configurations comprising numerous small-scale jet nozzles are required. The integration of large numbers of millimeter-scale injectors in tightly clustered arrays is likely to produce peculiar topological states determined by the collective dynamics of strongly interacting premixed hydrogen flames. Experimental investigation of two different pure hydrogen flame ensembles reveals that the characteristic dimension of a single injector element is the main determinant of the fundamental frequency of self-induced pressure oscillations, and that flame dynamics play a mechanistic role in the growth of higher harmonics, defining the thermoacoustic state of clustered lean-premixed hydrogen flames.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Thermodynamics
Oktay Hacihafizoglu, Cigdem Susantez, Kamil Kahveci, Sercan Yilmaz
Article
Multidisciplinary Sciences
Rafaela Pedroso Catureba, Aldelio Bueno Caldeira, Rodrigo Otavio de Castro Guedes
DEFENCE SCIENCE JOURNAL
(2019)
Article
Multidisciplinary Sciences
Cigdem Susantez, Aldelio Bueno Caldeira
DEFENCE SCIENCE JOURNAL
(2019)
Article
Engineering, Multidisciplinary
Cigdem Susantez, Aldelio B. Caldeira, Bruna R. Loiola
Summary: In this study, a dimensionless solidification model was proposed to investigate the heat transfer during the solidification process of High Explosive Anti-Tank (HEAT) warheads. Numerical simulations were performed to compare the effects of different boundary conditions on the solidification speed and the surrounding of liquid explosive. It was found that convection boundary condition accelerated the solidification process and ensured complete surrounding of liquid explosive by solid explosive. On the other hand, isothermal boundary condition reduced the occurrence of manufacturing defects and high thermal stress.
DEFENCE TECHNOLOGY
(2022)
Article
Multidisciplinary Sciences
Cigdem Susantez, Aldelio Bueno Caldeira
Summary: Understanding the heat transfer phenomenon during interior ballistics is crucial for predicting the temperature distribution inside the cannon barrel. This study presents a new numerical model that combines PRODAS and COMSOL simulations to accurately predict the thermal behavior of the cannon barrel.
DEFENCE SCIENCE JOURNAL
(2022)
Article
Energy & Fuels
Cigdem Susantez
Summary: Through numerical investigation of two different phase change materials in various configurations, it was found that the LHTES unit with n-octadecane in configuration-1 completed phase change earliest and absorbed the most heat.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Thermodynamics
Cigdem Susantez, Aldelio Bueno Caldeira
ISI BILIMI VE TEKNIGI DERGISI-JOURNAL OF THERMAL SCIENCE AND TECHNOLOGY
(2020)
Proceedings Paper
Polymer Science
Nicolis Amaral de Araujo, Jose Carlos Pinto, Aldelio Bueno Caldeira, Keila dos Santos Cople Lima, Antonio Luis dos Santos Lima
MACROMOLECULAR SYMPOSIA
(2019)
Article
Thermodynamics
Bruno R. Jaccoud, Helcio R. B. Orlande, Marcelo J. Colaco, Olivier Fudym, Aldelio B. Caldeira
HIGH TEMPERATURES-HIGH PRESSURES
(2018)
Article
Thermodynamics
Cigdem Susantez, Kamil Kahveci
ISI BILIMI VE TEKNIGI DERGISI-JOURNAL OF THERMAL SCIENCE AND TECHNOLOGY
(2017)
Article
Multidisciplinary Sciences
Aldelio Bueno Caldeira, Michelle Soraia de Carvalho, Ricardo Teixeira da Costa Neto
ACTA SCIENTIARUM-TECHNOLOGY
(2017)
Article
Engineering, Multidisciplinary
Cigdem Susantez, Aldelio B. Caldeira, Bruna R. Loiola
Summary: The study investigates the solidification process of High Explosive Anti-Tank (HEAT) warheads and ammunitions using numerical simulations and modeling software, considering the effects of different boundary conditions. Solidification is faster under convection, slower under isothermal condition, and intermediary under adiabatic conditions.
DEFENCE TECHNOLOGY
(2022)
