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Science and Technology of Combustion for Clean Energy
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Science and Technology of Combustion for Clean Energy

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "I2: Energy and Combustion Science".

Deadline for manuscript submissions: 7 March 2026 | Viewed by 2153

Special Issue Editor

Dr. Venera Giurcan

E-Mail Website
Guest Editor
“Ilie Murgulescu” Institute of Physical Chemistry, Romanian Academy, 202 Spl., Independentei, 060021 Bucharest, Romania
Interests: combustion, flames, and explosion of gaseous homogeneous systems; explosion initiation and propagation in enclosures at various initial conditions; flammability of hydrocarbon–oxidizer mixtures (including the presence of diluent or inhibitor gaseous additives)
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The combustion phenomenon has fascinated and been used by humans since ancient times and it is still used nowadays, especially to obtain the necessary energy for transport, preparation of hot water or food, and space heating. Lately, due to the fact that the pollution caused by the combustion processes has increased, scholars have turned their attention to obtaining clean energy and fuels. Therefore, the science and technology of combustion and flames are of great scientific interest and always remain topics of interest to develop modern and efficient combustion devices that achieve lower fuel consumption, higher power and lower pollutant emissions, so that a cleaner energy can be achieved. On the other hand, combustion phenomena represent a combination of chemical and physical processes that are complex processes involving knowledge not only in chemistry and physics, but also in engineering and technology. So, the study of combustion processes to obtain clean energy requires a strong connection between experiment, theory and technology. Finding such a connection is the main task of workers involved in these fields who are working hard to implement new systems for obtaining energy through combustion. Moreover, it is important to take into account that the combustion process should have the safest possible conditions both for the installations where the process takes place and for the people who operate the machinery. In this respect, these very important aspects must also be taken into account by researchers.

Therefore, this Special Issue is being launched to address recent advances in the science and technology of combustion from all points of view: experimental, theoretical and technological.

Dr. Venera Giurcan
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Energies is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • energy
  • green fuels
  • combustion process
  • combustion technology
  • energy production and storage
  • safety
  • experimental
  • simulation

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Published Papers (4 papers)

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Research

20 pages, 10430 KB  
Article
Modeling of Roughness Effects on Generic Gas Turbine Swirler via a Detached Eddy Simulation Low-y+ Approach
by Robin Vivoli, Daniel Pugh, Burak Goktepe and Philip J. Bowen
Energies 2025, 18(19), 5240; https://doi.org/10.3390/en18195240 - 2 Oct 2025
Abstract
The use of additive manufacturing (AM) has seen increased utilization over the last decade, thanks to well-documented advantages such as lower startup costs, reduced wastage, and the ability to rapidly prototype. The poor surface finish of unprocessed AM components is one of the [...] Read more.
The use of additive manufacturing (AM) has seen increased utilization over the last decade, thanks to well-documented advantages such as lower startup costs, reduced wastage, and the ability to rapidly prototype. The poor surface finish of unprocessed AM components is one of the major drawbacks of this technology, with the research literature suggesting a measurable impact on flow characteristics and burner operability. For instance, surface roughness has been shown to potentially increase resistance to boundary layer flashback—an area of high concern, particularly when utilizing fuels with high hydrogen content. A more detailed understanding of the underlying thermophysical mechanisms is, therefore, required. Computational fluid dynamics can help elucidate the impact of these roughness effects by enabling detailed data interrogation in locations not easily accessible experimentally. In this study, roughness effects on a generic gas turbine swirler were numerically modeled using a low-y+ detached eddy simulation (DES) approach. Three DES models were investigated utilizing a smooth reference case and two rough cases, the latter employing a literature-based and novel equivalent sand-grain roughness (ks) correlation developed for this work. Existing experimental isothermal and CH4 data were used to validate the numerical simulations. Detailed investigations into the effects of roughness on flow characteristics, such as swirl number and recirculation zone position, were subsequently performed. The results show that literature-based ks correlations are unsuitable for the current application. The novel correlation yields more promising outcomes, though its effectiveness depends on the chosen turbulence model. Moreover, it was demonstrated that, for identical ks values, while trends remained consistent, the extent to which they manifested differed under reacting and isothermal conditions. Full article
(This article belongs to the Special Issue Science and Technology of Combustion for Clean Energy)
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11 pages, 6376 KB  
Article
Study of Electro-Chemical Properties and Conditions of Flame Stabilization of Promising Fuel Mixtures CH4/H2 and NH3/H2
by Vladimir Lukashov, Andrey Tupikin, Yuriy Dubnishchev and Olga Zolotukhina
Energies 2025, 18(19), 5198; https://doi.org/10.3390/en18195198 - 30 Sep 2025
Abstract
This paper investigates the combustion characteristics of promising decarbonized fuel mixtures—methane/hydrogen (CH4/H2) and ammonia/hydrogen (NH3/H2)—with a focus on how they interact with external electric fields. The key findings are that these flames possess significant electrochemical [...] Read more.
This paper investigates the combustion characteristics of promising decarbonized fuel mixtures—methane/hydrogen (CH4/H2) and ammonia/hydrogen (NH3/H2)—with a focus on how they interact with external electric fields. The key findings are that these flames possess significant electrochemical properties, allowing for non-intrusive control over their stabilization, shape, and structure using relatively weak electric fields. The research combines experimental techniques like volt-ampere characteristic (VAC) measurement and advanced Hilbert visualization to analyze flame deformation, temperature distribution, and species concentration. Two orientations of the electric field were considered: transverse and longitudinal. For the transverse field, an assessment of the degree of flame deformation was made, indicating the preservation of the laminar combustion regime. In the longitudinal electric field, a change in the combustion stabilization mode was observed, which was detected through visualization and current-voltage characteristics (CVC). Full article
(This article belongs to the Special Issue Science and Technology of Combustion for Clean Energy)
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17 pages, 1413 KB  
Article
Thermogravimetric Analysis of Blended Fuel of Pig Manure, Straw, and Coal
by Chengzhe Shen, Yan Zhang, Gengsheng Liu, Dongxu Wang, Jinbao Zhang, Kai Yang, Xintong Wen, Quan Sun, Xuejun Dou, Yong Zhang, Jingwen Mao and Lei Deng
Energies 2025, 18(13), 3447; https://doi.org/10.3390/en18133447 - 30 Jun 2025
Viewed by 272
Abstract
This study investigated the combustion performance of pig manure, straw, and coal at various blending ratios using thermogravimetric analysis. The synergistic effect of coal and pig manure at various ratios was analyzed, and kinetic analysis was performed using the Coats–Redfern method. The results [...] Read more.
This study investigated the combustion performance of pig manure, straw, and coal at various blending ratios using thermogravimetric analysis. The synergistic effect of coal and pig manure at various ratios was analyzed, and kinetic analysis was performed using the Coats–Redfern method. The results showed that the overall combustion performance and stability of the blended fuel improved as the blending ratio of pig manure and straw increased. Increasing the ratio of pig manure reduced the ignition temperature of blended fuel from 696 K to 675 K. Additionally, the combustion of pig manure and coal exhibited a significant synergistic effect, strongest at a 5% blending ratio. For combustion reactions with conversion rates between 0.2 and 0.8, the activation energy required was 75.82 kJ mol−1 for a 10% pig manure blending ratio and 44.33 kJ mol⁻1 for a 30% blending ratio. These results demonstrate that lower activation energies suggest that the combustion reaction is more likely to proceed. The activation energy of straw was higher than that of pig manure at all blending ratios. These findings suggest that pig manure burns more easily when blended with coal than straw. Full article
(This article belongs to the Special Issue Science and Technology of Combustion for Clean Energy)
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14 pages, 2183 KB  
Article
Thermogravimetric Experimental Study on the Co-Combustion Characteristics of Coal and Salix
by Yinsheng Ma, Bao Feng, Li Gao, Zhenyu Guo, Yu Ai, Haoying Sun, Yong Zhang, Zhenyan Pan, Jingwen Mao, Ruyu Yan, Ningzhu Ye and Lei Deng
Energies 2025, 18(1), 56; https://doi.org/10.3390/en18010056 - 27 Dec 2024
Cited by 1 | Viewed by 852
Abstract
To study the co-combustion characteristics of coal and Salix, thermogravimetric analysis is adopted to evaluate their co-combustion performance. The effect of blending ratios and synergistic are investigated in detail. Furthermore, kinetic analysis is performed. The results show that the incorporation of Salix into [...] Read more.
To study the co-combustion characteristics of coal and Salix, thermogravimetric analysis is adopted to evaluate their co-combustion performance. The effect of blending ratios and synergistic are investigated in detail. Furthermore, kinetic analysis is performed. The results show that the incorporation of Salix into coal enhances combustion performance, with significant improvements observed at higher blending ratios. The ignition temperature decreases notably from 444 °C to 393 °C, highlighting an improvement in ignition properties. The primary weight loss peak shifts from 490 °C at a 15% biomass blend to approximately 320 °C at a 100% blend. Co-combustion demonstrates synergistic effects, with a 15% biomass blend optimizing combustion between 400 °C and 530 °C, while a 30% blend inhibits it. Additionally, temperatures above 600 °C exhibit an inhibitory effect. The activation energy is reduced to 25.38 kJ mol−1 at a 30% blend ratio and further to 23.06 kJ mol−1 at a 15% blend ratio at a heating rate of 30 K min−1. Increasing the biomass blend ratio and heating rate lowers the activation energy, which means facilitating the reaction process. Full article
(This article belongs to the Special Issue Science and Technology of Combustion for Clean Energy)
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