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Journal articles on the topic 'Combustion structures'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

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1

Coats, C. M. "Coherent structures in combustion." Progress in Energy and Combustion Science 22, no. 5 (1996): 427–509. http://dx.doi.org/10.1016/s0360-1285(96)00011-1.

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2

Li, H. P. "Banded structures in unstable combustion synthesis." Journal of Materials Research 10, no. 6 (1995): 1379–86. http://dx.doi.org/10.1557/jmr.1995.1379.

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Banded structures in combustion-synthesized products have been observed during unstable combustion synthesis. The formation of the banded structures is discussed in this article. It is noted that the band spacing was changed when several initial processing conditions were varied. Any change in the processing parameters that correspondingly caused more unstable combustion was observed to decrease the propagation velocity of the combustion front and increase the band spacing. The correlation of the band spacing and oscillatory frequency of the unstable oscillatory combustion with the propagation

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3

Kim, Jong-Chan, Won-Chul Jung, Ji-Seok Hong, and Hong-Gye Sung. "The Effects of Turbulent Burning Velocity Models in a Swirl-Stabilized Lean Premixed Combustor." International Journal of Turbo & Jet-Engines 35, no. 4 (2018): 365–72. http://dx.doi.org/10.1515/tjj-2016-0053.

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Abstract The effects of turbulent burning velocities in a turbulent premixed combustion simulation with a G-equation are investigated using the 3D LES technique. Two turbulent burning velocity models – Kobayashi model, which takes into account the burning velocity pressure effect, and the Pitsch model, which considers the flame regions on the premixed flame structure – are implemented. An LM6000 combustor is employed to validate the turbulent premixed combustion model. The results show that the flame structures in front of the injector have different shapes in each model because of the differe

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4

Marudhappan, Raja, Chandrasekhar Udayagiri, and Koni Hemachandra Reddy. "Combustion chamber design and reaction modeling for aero turbo-shaft engine." Aircraft Engineering and Aerospace Technology 91, no. 1 (2018): 94–111. http://dx.doi.org/10.1108/aeat-10-2017-0217.

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Purpose The purpose of this paper is to formulate a structured approach to design an annular diffusion flame combustion chamber for use in the development of a 1,400 kW range aero turbo shaft engine. The purpose is extended to perform numerical combustion modeling by solving transient Favre Averaged Navier Stokes equations using realizable two equation k-e turbulence model and Discrete Ordinate radiation model. The presumed shape β-Probability Density Function (β-PDF) is used for turbulence chemistry interaction. The experiments are conducted on the real engine to validate the combustion chamb

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5

Hendricks, R. C., D. T. Shouse, W. M. Roquemore, et al. "Experimental and Computational Study of Trapped Vortex Combustor Sector Rig with High-Speed Diffuser Flow." International Journal of Rotating Machinery 7, no. 6 (2001): 375–85. http://dx.doi.org/10.1155/s1023621x0100032x.

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The Trapped Vortex Combustor (TVC) potentially offers numerous operational advantages over current production gas turbine engine combustors. These include lower weight, lower pollutant emissions, effective flame stabilization, high combustion efficiency, excellent high altitude relight capability, and operation in the lean burn or RQL modes of combustion. The present work describes the operational principles of the TVC, and extends diffuser velocities toward choked flow and provides system performance data. Performance data include EINOx results for various fuel-air ratios and combustor reside

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6

Meng, Nan, and Feng Li. "Large-Eddy Simulations of Unsteady Reaction Flow Characteristics Using Four Geometrical Combustor Models." Aerospace 10, no. 2 (2023): 147. http://dx.doi.org/10.3390/aerospace10020147.

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Combustion instability constitutes the primary loss source of combustion chambers, gas turbines, and aero engines, and it affects combustion performance or results in a sudden local oscillation. Therefore, this study investigated the factors affecting flame fluctuation on unsteady combustion flow fields through large-eddy simulations. The effects of primary and secondary holes in a triple swirler staged combustor on flame propagation and pressure fluctuation in a combustion field were studied. Moreover, the energy oscillations and dominant frequencies in the combustion field were obtained usin

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7

Zhang, Qun, Peng Zhang, Shun-li Sun, et al. "Large eddy simulation study of flow field characteristics of a combustor with two coaxial swirlers." Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 234, no. 5 (2019): 625–42. http://dx.doi.org/10.1177/0957650919870420.

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The cold and reaction flow fields of a combustor with two coaxial swirlers are investigated by means of large eddy simulation. Effective data processing methods such as proper orthogonal decomposition and fast Fourier transform are employed for analysis. The complex flow phenomena such as swirling jet, shear layer, recirculation zone, and precession vortex core are observed and their characteristics are analyzed. The dynamics of the flame and its interactions with the complex swirling flows and large-scale eddies are characterized. The precession vortex core structures and its influences on th

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8

Hwang, Donghyun, Cheolwoong Kang, and Kyubok Ahn. "Effect of Mixing Section Acoustics on Combustion Instability in a Swirl-Stabilized Combustor." Energies 15, no. 22 (2022): 8492. http://dx.doi.org/10.3390/en15228492.

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An experimental study was performed to investigate the characteristics of two different combustion instability modes in a swirl-stabilized combustor. The first is the eigenfrequency corresponding to the half-wave of the combustion chamber section, and the second is the quarter-wave eigenmode of the inlet mixing section. The purpose of this study is to understand the effects of the swirl number on each combustion instability mode and analyze their generalized characteristics. Premixed gases composed of hydrocarbon fuels (C2H4 and CH4) and air were burned by independently varying the experimenta

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9

Peters, B. "Cellular structures in solid fuel combustion." Flow, Turbulence and Combustion 73, no. 3-4 (2005): 217–29. http://dx.doi.org/10.1007/s10494-005-4031-8.

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10

Arkhipov, V. A., V. N. Vilyunov, E. A. Kozlov, and Vl F. Trofimov. "Convective combustion of ordered porous structures." Combustion, Explosion, and Shock Waves 22, no. 4 (1987): 410–14. http://dx.doi.org/10.1007/bf00862882.

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11

Wang, Taiyu, Zhenguo Wang, Zun Cai, et al. "Effects of combustor geometry on the combustion process of an RBCC combustor in high-speed ejector mode." Modern Physics Letters B 33, no. 27 (2019): 1950330. http://dx.doi.org/10.1142/s0217984919503305.

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The combustion characteristics of high-speed ejector mode in a 2-dimensional strut-based RBCC (rocket-based combined cycle) combustor had been investigated numerically in a Mach 2.5 supersonic flow. The numerical approach had been validated by comparing numerical results with available experimental data. Besides, three different hydrogen-air chemical reaction mechanisms had also been compared. The effect of the combustor geometry on the combustion process was then discussed by analyzing the heat release distribution and flow field. It was found that the wall configuration, closeout angle of th

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12

Yu, Xin, Zhen Cao, JiangBo Peng, et al. "Statistical Analysis of Flame Oscillation Characterization of Oxy-Fuel in Heavy Oil Boiler Using OH Planar Laser-Induced Fluorescence." Journal of Spectroscopy 2019 (July 2, 2019): 1–10. http://dx.doi.org/10.1155/2019/7085232.

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The present work investigated the flame structures and oscillations of oxy-fuel combustions in a heavy oil boiler using OH planar laser-induced fluorescence imaging. Combustion instabilities, such as flame oscillation and combustion fluctuation, can assess the performance of an industrial burner in the boiler. The peak position variation in OH concentration was associated with the change of the reaction zone that corresponded with the fluctuation of the heat-release zone in the combustion chamber, which provides a valuable reference for the design of the combustion chamber. The experimental re

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13

Wang, Pei Wen, Yang Du, Wei Dong Shen, Jian Jun Liang, and Jia Feng Xu. "Numerical Simulation of Catalytic Combustion Based on Different Catalyst Structures." Advanced Materials Research 791-793 (September 2013): 311–14. http://dx.doi.org/10.4028/www.scientific.net/amr.791-793.311.

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The catalytic combustion of methane over a single pellet catalyst of different structures was modeled by two-dimensional numerical simulations. The same boundary conditions as wall as methods were selected to compare the properties of combustion in the catalysts and the combustion efficiency of the gas flow. The results indicate that the egg-shell type of catalyst is suitable for fast combustion and it can improve the efficiency of utilizing catalyst especially for noble metal catalyst. For situations where the active section of the catalyst is prone to be poisoned or where the lost of catalys

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14

Rao, M. Srinivasa. "Flow Analyses of Integrated Liquid Fuel RAMJET Propulsion System." Defence Science Journal 74, no. 2 (2024): 288–92. http://dx.doi.org/10.14429/dsj.74.18510.

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A CFD study is performed to check the seamless flow behaviour of the Liquid Fuel Ramjet Propulsion system which includes, air intakes, combustor and nozzle. Resolving both supersonic and subsonic flow scales in the same domain makes the simulations complex. Addition of combustion with stiff chemistry makes the simulations more difficult. CFD simulations are carried out using commercially available CFD software. Liquid fuel is injected as discrete phase and the flow turbulence is modelled using Realizable k-ε turbulence model. Jet-A + air combustion has been simulated using combined finite rate

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15

Huang, Juan-Chen, Yu-Hsuan Lai, Jeng-Shan Guo, and Jaw-Yen Yang. "Simulation of Two-Dimensional Scramjet Combustor Reacting Flow Field Using Reynolds Averaged Navier-Stokes WENO Solver." Communications in Computational Physics 18, no. 4 (2015): 1181–210. http://dx.doi.org/10.4208/cicp.190115.210715s.

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AbstractThe non-equilibrium chemical reacting combustion flows of a proposed long slender scramjet system were numerically studied by solving the turbulent Reynolds averaged Navier-Stokes (RANS) equations. The Spalart-Allmaras one equation turbulence model is used which produces better results for near wall and boundary layer flow field problems. The lower-upper symmetric Gauss-Seidel implicit scheme, which enables results converge efficiently under steady state condition, is combined with the weighted essentially non-oscillatory (WENO) scheme to yield an accurate simulation tool for scramjet

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16

Sun, Peifeng, Yiren Yuan, Bing Ge, Yinshen Tian, Zilai Zhang, and Shusheng Zang. "Combustion Oscillation Characteristics and Flame Structures in a Lean Premixed Prevaporized Combustor." Energy & Fuels 31, no. 9 (2017): 10060–67. http://dx.doi.org/10.1021/acs.energyfuels.7b01302.

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17

Deng, Yucheng, Xinzhou Wu, Peng Deng, Fayang Guan, and Hui Ren. "Fabrication of Energetic Composites with 91% Solid Content by 3D Direct Writing." Micromachines 12, no. 10 (2021): 1160. http://dx.doi.org/10.3390/mi12101160.

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Direct writing is a rapidly developing manufacturing technology that is convenient, adaptable and automated. It has been used in energetic composites to manufacture complex structures, improve product safety, and reduce waste. This work is aimed at probing the formability properties and combustion performances of aluminum/ammonium perchlorate with a high solid content for direct writing fabrication. Four kinds of samples with different solid content were successfully printed by adjusting printing parameters and inks formulas with excellent rheological behavior and combustion properties. A high

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18

Meng, Nan, and Feng Li. "Large-eddy simulation of unstable non-reactive flow in a swirler combustor." Physics of Fluids 34, no. 11 (2022): 114107. http://dx.doi.org/10.1063/5.0122462.

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A comprehensive study on the influence of the unsteady non-reactive flow characteristics of turbulent flow in a three-stage swirl combustion chamber using power spectral density methods was conducted using large eddy simulations. The results demonstrated that instabilities were observed owing to large-scale vortex structures and periodic oscillations of the non-reactive flow. The boundary of the central recirculation zone (shear layers) enhanced the instability of the Helmholtz mode in the combustor. By considering the power spectral density of different monitoring points, the instability char

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19

Marley, Stephen K., Eric J. Welle, and Kevin M. Lyons. "Combustion Structures in Lifted Ethanol Spray Flames." Journal of Engineering for Gas Turbines and Power 126, no. 2 (2004): 254–57. http://dx.doi.org/10.1115/1.1688768.

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The development of a double flame structure in lifted ethanol spray flames is visualized using OH planar laser-induced fluorescence (PLIF). While the OH images indicate a single reaction zone exists without co-flow, the addition of low-speed co-flow facilitates the formation of a double flame structure that consists of two diverging flame fronts originating at the leading edge of the reaction zone. The outer reaction zone burns steadily in a diffusion mode, and the strained inner flame structure is characterized by both diffusion and partially premixed combustion exhibiting local extinction an

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20

Lapshin, O. V., and V. K. Smolyakov. "Theory of combustion of thin film structures." Combustion, Explosion, and Shock Waves 49, no. 6 (2013): 662–67. http://dx.doi.org/10.1134/s001050821306004x.

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21

Boshoff-Mostert, L., and H. J. Viljoen. "Analysis of homogeneous combustion in monolithic structures." Chemical Engineering Science 51, no. 7 (1996): 1107–11. http://dx.doi.org/10.1016/s0009-2509(96)80009-1.

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22

Ozerkovskaya, N. I., A. N. Firsov, and K. G. Shkadinskii. "Emergence of Spatial Structures during Filtration Combustion." Combustion, Explosion, and Shock Waves 46, no. 5 (2010): 515–22. http://dx.doi.org/10.1007/s10573-010-0067-8.

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23

J. March, R., A. Baldessari, J. C. Ferreri, et al. "Étude des structures de combustion archéologiques d'Argentine." Bulletin de la Société préhistorique française 86, no. 10 (1989): 384–92. http://dx.doi.org/10.3406/bspf.1989.9896.

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24

CARDOSO, João Luís. "Estruturas de combustão identificadas no povoado pré-histórico de Leceia (Oeiras)." Estudos Arqueológicos de Oeiras 35 (April 17, 2025): 11–34. https://doi.org/10.5281/zenodo.15005626.

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All combustion structures identified in the prehistoric settlement of Leceia (Oeiras) are inventoried, distributed across a vast chronology corresponding to the Late Neolithic (ca. 3400-2900 BC), the Early Chalcolithic (ca. 2800-2500 BC) and the Full/Late Chalcolithic (ca. 2500-2000 BC). The remarkable number of identified combustion structures, which reaches twenty-five, despite the general analogy between them, which is explained by the similarity of functions, allowed the identification of eight variants, duly characterized. This is the first contribution dedicated to the systematic study o

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25

Moreno Pacheco, Luis Alfonso, Juan Gabriel Barbosa Saldaña, Edgar Geovany López Jarquín, José Martínez Trinidad, Ricardo Andrés García-León, and Miguel Toledo Velázquez. "Effects of the Position and Size of the Air Injection Holes in the Flow Structure of a Trapped-Vortex Combustor." Aerospace 12, no. 3 (2025): 264. https://doi.org/10.3390/aerospace12030264.

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Combustion efficiency and flame stabilization are two main parameters in combustor design according to current environmental policies imposed on the commercial aviation industry. An alternative for flame stabilization and high efficiency in the combustion process in combustors is the trapped-vortex combustor (TVC) concept. This study uses a numerical simulation for non-reactive flow to determine the optimal location and size of the injection holes for the airflow supplied to a TVC. The results show two vortex flow structures in the cavity that change in size and intensity according to the allo

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26

BELIKOV, A. S., V. A. SHALOMOV, O. V. SHYBA, and A. O. MAKHINKO. "THEORETICAL ANALYSIS OF THE COMBUSTION PROCESS." Ukrainian Journal of Civil Engineering and Architecture, no. 4 (October 22, 2022): 26–30. http://dx.doi.org/10.30838/j.bpsacea.2312.250822.26.874.

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Problem statement. The analysis of fire hazard shows that fires cause significant material damage to the economy around the world, significantly complicating the environmental situation, endangering human life. Thus, in Ukraine there are more than 50 thousand fires every year, in which people die, and material damage exceeds hundreds of millions of hryvnias, incidental losses are 20 times greater. This alarming statistics is largely due to the increased fire hazard of buildings and structures erected and operated by changing production technology, increasing the number of storeys and building

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27

Zheng, Hongtao, Gang Pan, Xi Chen, and Xiaoming Hu. "Effect of Dual Fuel Nozzle Structures on Combustion Flow Field in CRGT Combustor." Mathematical Problems in Engineering 2013 (2013): 1–11. http://dx.doi.org/10.1155/2013/913837.

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28

Hamdani, Ahmad Helman, and Agus Didit Haryanto. "The Spontaneous Combustion Potency of Lignite Coal Based on FTIR." European Journal of Environment and Earth Sciences 3, no. 5 (2022): 37–40. http://dx.doi.org/10.24018/ejgeo.2022.3.5.326.

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To understand the role of functional groups in the spontaneous combustion of lignite coal, the distribution of functional groups in the lignite coal of the Sajau Formation in the Berau Basin, Indonesia, was studied. The functional group characterization was carried out using the Fourier Transform Infra Red (FTIR) method. The results revealed the presence of four functional groups, namely hydroxyl structures, aliphatic structures, oxygen-containing structures, and aromatic structures. The lignite contained more hydroxyl and oxygen-bearing functional groups, from which aliphatic and aromatic; th

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29

Rusanova, Ekaterina, and Machmud Abu-Khasan. "Durable geoecoprotective building structures from ash foam concrete for high-rise construction." MATEC Web of Conferences 265 (2019): 05006. http://dx.doi.org/10.1051/matecconf/201926505006.

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The article analyzes the use of ash foam concrete filler structures based on ash from sludge combustion for high-rise construction. Physical and chemical as well as physical and mechanical studies of samples of structures made of ash foam concrete were carried out. Ash foam concrete was produced with the use of ash from sludge combustion instead of natural sand after long-term operation of building structures. The improvement of the material in thermal protection is shown. Phase changes in the structures over time which is more than 12 years are traced.

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Liu, Tongshuang, Ang Li, Min Yao, et al. "Fire Behavior Characteristics and Computational Simulation Research on Historic Wooden Structures." Fire 7, no. 12 (2024): 478. https://doi.org/10.3390/fire7120478.

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Wooden structures are prone to fire hazards, and studying their combustion properties is vital for their protection. Samples of fresh pine wood (FP) and pine subjected to artificially accelerated aging (treated at 240 circulation) were collected and prepared for analysis. The heat-release rate, smoke production, and yields of carbon monoxide (CO) and carbon dioxide (CO2) from both types of pine were assessed using conical calorimetry to determine their combustion characteristics. A historic building in Xi’an was modeled using PyroSim to serve as a representative case. The experimentally obtain

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31

Solmaz, Mehmet Burak, and Sitki Uslu. "Comparison of Reacting DDES and LES CFD Simulation Methodologies for a Dual Inlet Ramjet Engine Combustor." Isı Bilimi ve Tekniği Dergisi 45, no. 1 (2025): 10–21. https://doi.org/10.47480/isibted.1490666.

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The design of a dual inlet dump ramjet combustor is critical in the development of propulsion systems. Parameters such as pressure drop, pressure fluctuations, and combustion efficiency must be evaluated across various flight regimes. In this study, Large Eddy Simulation (LES) and Delayed Detached Eddy Simulation (DDES) techniques, coupled with the Steady Laminar Flamelet combustion model, are used to model a generic ramjet combustor. Grid convergence was ensured through the application of the Richardson extrapolation method, and the grid quality was evaluated using the M-index. A close agreem

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32

Hu, Jia Nan, Ya Qin Bai, Rui Fu, Chun Li, Wen Yan Zhao, and Rui Sheng Hu. "The Structures and Preparation Methods of Perovskite-Type Oxide Catalysts for Natural Gas Catalytic Combustion." Applied Mechanics and Materials 448-453 (October 2013): 2917–21. http://dx.doi.org/10.4028/www.scientific.net/amm.448-453.2917.

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Catalytic combustion technology can effectively reduce the temperature of the combustion reaction and significantly inhibit the formation of NOx. Perovskites catalyst materials have high stability, varied chemical composition, and low cost etc. A combination of catalytic combustion technology and perovskite catalyst materials has great significance for energy industry and environment protection. However, improving lower temperature catalytic activity and high temperature thermostability performance of perovskite catalyst is still major problem. Some researchers have improved the activity and s

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33

Sabia, Pino, M. De Joannon, G. Sorrentino, G. Cozzolino, and Antonio Cavaliere. "PYROLYTIC AND OXIDATIVE STRUCTURES IN HDDI MILD COMBUSTION." International Journal of Energy for a Clean Environment 11, no. 1-4 (2010): 21–34. http://dx.doi.org/10.1615/interjenercleanenv.2011001468.

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Kubota, N., T. Kuwahara, S. Miyazaki, K. Uchiyama, and N. Hirata. "Combustion wave structures of ammonium perchlorate composite propellants." Journal of Propulsion and Power 2, no. 4 (1986): 296–300. http://dx.doi.org/10.2514/3.22885.

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35

Ragucci, R., A. Cavaliere, A. Ciajolo, A. D'anna, and A. D'alessio. "Structures of diesel sprays in isobaric combustion conditions." Symposium (International) on Combustion 24, no. 1 (1992): 1565–71. http://dx.doi.org/10.1016/s0082-0784(06)80182-7.

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36

Mühlfeld, Christian, Barbara Rothen-Rutishauser, Fabian Blank, Dimitri Vanhecke, Matthias Ochs, and Peter Gehr. "Interactions of nanoparticles with pulmonary structures and cellular responses." American Journal of Physiology-Lung Cellular and Molecular Physiology 294, no. 5 (2008): L817—L829. http://dx.doi.org/10.1152/ajplung.00442.2007.

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Combustion-derived and synthetic nano-sized particles (NSP) have gained considerable interest among pulmonary researchers and clinicians for two main reasons. 1) Inhalation exposure to combustion-derived NSP was associated with increased pulmonary and cardiovascular morbidity and mortality as suggested by epidemiological studies. Experimental evidence has provided a mechanistic picture of the adverse health effects associated with inhalation of combustion-derived and synthetic NSP. 2) The toxicological potential of NSP contrasts with the potential application of synthetic NSP in technological

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Babuk, V. A., N. L. Budnyi, A. A. Nizyaev, S. Yu Naryzhnyi, and D. I. Kuklin. "The role of intermediate structures in the combustion of high-energy condensed systems." Journal of Physics: Conference Series 2233, no. 1 (2022): 012004. http://dx.doi.org/10.1088/1742-6596/2233/1/012004.

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Abstract During the combustion of high-energy condensed systems, the formation of an intermediate structure - a skeleton layer, is possible, which has a significant effect on the combustion process. An experimental study was carried out to determine the nature of the effect of the curing of the binder on forming this structure. The article shows the specific role of the used hardener, polyethylene polyamine, presents the solutions for simulating the phenomena in the surface layer in the presence and absence of a skeleton layer, as well as shows the possibility of predicting the characteristics

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38

Mostovshchikov, Andrei V., Alexander P. Ilyin, and Irina K. Zabrodina. "Morphology of Aluminum Nanopowder Combustion Products in a Magnetic Field in Air." Key Engineering Materials 685 (February 2016): 516–20. http://dx.doi.org/10.4028/www.scientific.net/kem.685.516.

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The microstructure of aluminum nanopowder combustion crystalline products in air and the influence of a constant magnetic field (with induction of 0.3 T) on their structures have been studied. It was revealed that in the combustion products of free-poured aluminum nanopowder two-level whiskers are present. Hexagonal single crystals are formed by combustion in air in a homogeneous magnetic field, and in case of inhomogeneous magnetic field (with induction of 0.3 T) faceted elongated crystals of micron size are generated. The crystallites of such structure are formed due to the mass transfer of

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Iordan, Yu. "Experimental studies of thermodynamic combustion processes of combustible demonstrators." Journal of Physics: Conference Series 2182, no. 1 (2022): 012052. http://dx.doi.org/10.1088/1742-6596/2182/1/012052.

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Abstract The description of experimental benches for combustion of demonstration elements of material samples - combustion demonstrators (CD) is given. CD for investigating thermodynamic processes during combustion on experimental benches are developed. The results of experimental studies of combustion of CD made of different materials (existing and synthesized) are presented. A new direction of research is formulated - the development of combustible materials and structures made of them, providing the specified characteristics at all stages of operation.

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40

Savitskii, Alexey, Dmitriy Sharaborin, Leonid Chikishev, and Vladimir Dulin. "Flow Instability Control in a Model Swirl-Stabilized Combustor with Central Jet Injection." Inventions 8, no. 6 (2023): 148. http://dx.doi.org/10.3390/inventions8060148.

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Swirling flows often occur in nature and industrial applications. With an increase in swirl intensity, such rotating flows are known to become unstable and undergo a sudden breakdown of the vortex core, resulting in unsteady flow dynamics with intensive pressure fluctuations. In particular, swirling flows are organized in combustion chambers to stabilize the flame around the central recirculation zone, formed due to the vortex core breakdown. However, the impact of large-scale vortex structures, including the precessing vortex core and secondary helical vortices, on unsteady combustion regimes

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Yu, Lin, Gui Qiang Diao, Fei Ye, Ming Sun, Yue Liu, and Qian Yu. "Dimethyl Ether Catalytic Combustion over Manganese Oxides with Different Structures." Advanced Materials Research 146-147 (October 2010): 1482–85. http://dx.doi.org/10.4028/www.scientific.net/amr.146-147.1482.

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α-MnO2, β-MnO2 and Mn2O3 were synthesized from birnessite followed by acid treatment and subsequently calcined under different conditions. These catalysts were used for catalytic combustion of dimethyl ether (DME) and characterized by XRD, BET and H2-TPR techniques. The results showed that the catalytic activity of α-MnO2, β-MnO2 and Mn2O3 are higher than that of birnessite. Larger specific surface area as well as the better reducibility of Mn species in the manganese oxides might be the main contribution for the DME combustion activity.

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42

Midgley, Kris, Adrian Spencer, and James J. McGuirk. "Unsteady Flow Structures in Radial Swirler Fed Fuel Injectors." Journal of Engineering for Gas Turbines and Power 127, no. 4 (2004): 755–64. http://dx.doi.org/10.1115/1.1925638.

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Many fuel injector geometries proposed for lean-premixed combustion systems involve the use of radial swirlers. At the high swirl numbers needed for flame stabilization, several complex unsteady fluid mechanical phenomena such as vortex breakdown and recirculation zone precession are possible. If these unsteady aerodynamic features are strongly periodic, unwanted combustion induced oscillation may result. The present paper reports on an isothermal experimental study of a radial swirler fed fuel injector originally designed by Turbomeca, and examines the dynamical behavior of the unsteady aerod

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Hou, Xiaowei, Hanyu Duan, Runxia He, et al. "Effect of ionic liquids on the microstructure and combustion performance of Shengli lignite." RSC Advances 13, no. 34 (2023): 23669–81. http://dx.doi.org/10.1039/d3ra03976e.

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Xi, Wenxiong, Pengchao Liu, Rongdi Zhang, Tianyang Dong, and Jian Liu. "Numerical Investigation of Flow Structures and Combustion Mechanisms with Different Injection Locations in a Hydrogen-Fueled Scramjet Combustor." Fire 7, no. 6 (2024): 191. http://dx.doi.org/10.3390/fire7060191.

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This work primarily focuses on a three-dimensional model of flame propagation and stable combustion in a scramjet chamber. The one-equation LES turbulence model is adopted to close the sub-grid-scale turbulent viscosity terms. The finite-rate combustion model, along with the Jachimowski detailed hydrogen reaction mechanism with eight components and nineteen steps, is used to analyze the flame propagation characteristics of hydrogen combustion in the scramjet combustion chamber. Initially, based on the combustion chamber model, the effect of different injection locations and equivalence ratios

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Li, H. P. "Investigation of propagation modes and temperature/velocity variation on unstable combustion synthesis." Journal of Materials Research 17, no. 12 (2002): 3213–21. http://dx.doi.org/10.1557/jmr.2002.0465.

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Combustion synthesis/micropyretic synthesis is a technique in which material synthesis is accomplished by the propagation of a combustion front across the sample. In some cases, the combustion front may propagate in an unstable mode where the propagation velocity and combustion temperature of the combustion front are altered periodically. In this study, the processing conditions leading to unstable combustion reaction were first studied theoretically. The boundary temperatures separating stable and unstable reactions were then determined. The numerical analysis showed that the combustion tempe

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Krobthong, Sucheewan, Tipawan Rungsawang, and Sutthipoj Wongrerkdee. "Comparison of ZnO Nanoparticles Prepared by Precipitation and Combustion for UV and Sunlight-Driven Photocatalytic Degradation of Methylene Blue." Toxics 11, no. 3 (2023): 266. http://dx.doi.org/10.3390/toxics11030266.

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ZnO nanoparticles (NPs) were comparatively synthesized via precipitation and combustion techniques. The ZnO NPs synthesized via precipitation and combustion exhibited similar polycrystalline hexagonal wurtzite structures. The large crystal sizes of ZnO NPs were obtained from the ZnO precipitation in comparison with those from the ZnO combustion, while the particle sizes were in the same range. The functional analysis implied that the ZnO structures had surface defects. Moreover, absorbance measurement showed the same absorbance range in ultraviolet light. In the photocatalytic degradation of m

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Zhang, Hao, and Yang Yu. "Study on the influence of structural parameters of micromixing burner on combustion characteristics and NO_x emissions." Journal of Physics: Conference Series 3026, no. 1 (2025): 012046. https://doi.org/10.1088/1742-6596/3026/1/012046.

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Abstract The micro-mixing combustion technology achieves efficient mixing of fuel and oxidizer as well as the formation of jet flames by replacing traditional swirler structures with micro-mixing units. Based on the concept of micro-mixing diffusion combustion, this study employs numerical simulation methods to systematically investigate the influence of the mixing distance of H2/air and the cross-sectional area of the air channel on the combustion characteristics within a unit micro-mixing combustor. The research demonstrates that an increase in mixing distance significantly enhances mixing u

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Ye, Shihong, Miaomiao Hao, Haoran Guo, Lin Lu, Huanhuan Xu, and Xiaohan Ren. "A review of motivations, methods, and achievements on microgravity combustion research." E3S Web of Conferences 300 (2021): 01021. http://dx.doi.org/10.1051/e3sconf/202130001021.

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Microgravity combustion has always been one of the key and frontier research fields in the international combustion community. Why has microgravity combustion attracted so much attention? First of all, fire safety and combustion reliability are imminent to spacecraft. Secondly, the convection effect is weakened in the microgravity environment, and the basic combustion phenomena are more prominent, which is greatly helpful to study the fundamental laws of combustion and develop reliable combustion models for fuels. This article systematically summarized and analyzed the research focuses, namely

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Chen, Mingmin, Xinbo Huang, Zhaokun Wang, Hongtao Zheng, and Fuquan Deng. "Impact of Oxygen Content on Flame Dynamics in a Non-Premixed Gas Turbine Model Combustor." Journal of Marine Science and Engineering 12, no. 4 (2024): 621. http://dx.doi.org/10.3390/jmse12040621.

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In this study, large eddy simulation (LES) was used to investigate the dynamic characteristics of diffusion flames in a swirl combustion chamber at an oxygen content of 11–23 wt% and temperature of 770 K. The proper orthogonal decomposition (POD) method was employed to obtain flame dynamic modes. The results indicate that oxygen content has a significant impact on the downstream flow and flame combustion characteristics of the swirl combustion chamber. With oxygen content increasing, the size of the recirculation zone is reduced, and the flame field fluctuations are intensified. The pressure a

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Sung, Bu-Kyeng, Min-Seon Jo, Jae-Eun Kim, and Jeong-Yeol Choi. "Numerical Studies on the Flame Structures and Combustion Performance of Supersonic Turbulent Combustion in DCR." Journal of Propulsion and Energy 5, no. 1 (2025): 22–32. https://doi.org/10.6108/jpne.2025.5.1.022.

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