Relevant bibliographies by topics / Spherical flame propagation

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  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'Spherical flame propagation'

Author: Grafiati
Published: 4 June 2021
Last updated: 26 July 2025

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Journal articles on the topic "Spherical flame propagation"

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Joo, S. H., K. M. Chun, Y. Shin, and K. C. Lee. "An Investigation of Flame Expansion Speed With a Strong Swirl Motion Using High-Speed Visualization." Journal of Engineering for Gas Turbines and Power 125, no. 2 (2003): 485–93. http://dx.doi.org/10.1115/1.1564067.

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In this study, a simple linear supposition method is proposed to separate the flame expansion speed and swirl motion of a flame propagating in an engine cylinder. Two series of images of flames propagating in the cylinder with/without swirl motion were taken by a high frame rate digital video camera. A small tube (4 mm ID) was installed inside the intake port to deliver the fuel/air mixture with strong swirl motion into the cylinder. An LDV was employed to measure the swirl motion during the compression stroke. Under the assumption that flame propagates spherically from the each point of the f
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Mitu, Maria, Venera Giurcan, Codina Movileanu, Domnina Razus, and Dumitru Oancea. "Propagation of CH4-N2O-N2 Flames in a Closed Spherical Vessel." Processes 9, no. 5 (2021): 851. http://dx.doi.org/10.3390/pr9050851.

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Flammable fuel-N2O mixtures raise safety and environmental protection issues in areas where these mixtures are used (such as: industry, research, internal combustion engines). Therefore, it is important to know their laminar combustion velocities and propagation speeds—important safety parameters for design of active protection devices against gas explosions and corresponding safety recommendations. In this paper, the laminar combustion velocities of N2-diluted CH4-N2O flames, obtained in experiments on outwardly propagating flames, at various initial pressures (within 0.5–2.0 bar) and room te
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Parsinejad, Farzan, Matyas Matlo, and Mohamad Metghalchi. "A Mathematical Model for Schlieren and Shadowgraph Images of Transient Expanding Spherical Thin Flames." Journal of Engineering for Gas Turbines and Power 126, no. 2 (2004): 241–47. http://dx.doi.org/10.1115/1.1688368.

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Optical behavior of spherical flames is investigated using both Schlieren and shadowgraph methods. A mathematical model has been developed to predict the intensity of refracted light beams interacting with a transient expanding thin flame. Experimental facilities have been built to visualize transient expanding spherical flames. The facilities include a cylindrical chamber with two end glasses for optical observation. Shadowgraph and Schlieren pictures of flame propagation have been taken using a high-speed charged coupled device camera. Experimental results are in very good agreement with tho
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4

Haq, M. Z. "Correlations for the Onset of Instabilities of Spherical Laminar Premixed Flames." Journal of Heat Transfer 127, no. 12 (2005): 1410–15. http://dx.doi.org/10.1115/1.2098867.

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A spherically expanding flame in a quiescent premixture is a bifurcation phenomenon, in which the flame becomes unstable at a radius, greater than some critical value, while remaining stable below that critical radius. Beyond this critical radius, developing instabilities are initiated by propagating cracks to form a coherent structure covering the entire flame surface and the flame accelerates. The present paper reports a Schlieren photographic study of spherical flame propagation in methane—air, iso-octane—air and n-heptane—air premixtures at different initial conditions where the onset of i
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Kelley, Andrew P., John K. Bechtold, and Chung K. Law. "Premixed flame propagation in a confining vessel with weak pressure rise." Journal of Fluid Mechanics 691 (December 2, 2011): 26–51. http://dx.doi.org/10.1017/jfm.2011.439.

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AbstractThe propagation of a premixed flame inside of a confining vessel filled with combustible fluid is determined using large-activation-energy asymptotics. The flame structure is analysed assuming that spatial and temporal variations in the transverse direction are weak compared to those in the direction normal to the flame surface. The analysis considers weak pressure rise from confinement and also allows for mixtures that are both near and removed from stoichiometry, non-unity reaction orders, temperature-dependent transport coefficients, and general Lewis numbers. The resulting equation
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Almyali, Hussein M., Zaid M. H. Al Dulaimi, and Mohammed A. Al-Fahham. "A Review: Flame Propagation Dynamics in Open Tubes: Factors Influencing Combustion Conditions and Practical Implementations." Salud, Ciencia y Tecnología - Serie de Conferencias 3 (May 31, 2024): 816. http://dx.doi.org/10.56294/sctconf2024816.

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This study examines the combustion conditions of fuel flame propagation within a tube of uniform cross-sectional area, where ignition occurs at the sealed end and the flame propagates in the direction of both the open and sealed ends. Both factors exert an influence on the configuration and functioning of combustion systems. To gain a comprehensive understanding of the impact of practical implementations in various combustion systems, it is imperative to comprehend the variations in flame propagation stages as a result of thermodynamic conditions. The operational conditions involving pressures
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Pan, Jiaying, Yu He, Tao Li, Haiqiao Wei, Lei Wang, and Gequn Shu. "Effect of Temperature Conditions on Flame Evolutions of Turbulent Jet Ignition." Energies 14, no. 8 (2021): 2226. http://dx.doi.org/10.3390/en14082226.

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Turbulent jet ignition technology can significantly improve lean combustion stability and suppress engine knocking. However, the narrow jet channel between the pre-chamber and the main chamber leads to some difficulties in heat exchange, which significantly affects combustion performance and mechanical component lifetime. To clarify the effect of temperature conditions on combustion evolutions of turbulent jet ignition, direct numerical simulations with detailed chemical kinetics were employed under engine-relevant conditions. The flame propagation in the pre-chamber and the early-stage turbul
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Yu, Yangyang, Lehai Liu, Junhong Zhang, Jun Wang, Xiangde Meng, and Dan Wang. "Explosion-Suppression Characteristics of Nonmetallic Spherical Spacers on Propane-Air Mixtures in Confined Space." Applied Sciences 11, no. 19 (2021): 9238. http://dx.doi.org/10.3390/app11199238.

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The explosion-suppression effects of NSSs on overpressures, flame propagation and flame tip velocities were explored under the initial pressures of 0.2 MPa, 0.3 MPa and 0.4 MPa. All experiments tested in a constant volume combustion bomb (CVCB). Explosion reaction of premixed propane–air gas in a new designed CVCB filled with nonmetallic spherical spacers (NSSs) was analyzed. The results showed that overpressures decreased under the different initial pressures. With the increase of filling density, the overpressure decreased, the time to reach explosion overpressure decreased, and the decay ra
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Giurcan, Venera, Maria Mitu, Codina Movileanu, Domnina Razus, and Dumitru Oancea. "Propagation Velocity of Flames in Inert-Diluted Stoichiometric Propane-Air Mixtures: Pressure and Temperature Dependence." Processes 9, no. 6 (2021): 997. http://dx.doi.org/10.3390/pr9060997.

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The flammable propane–air mixtures raise specific safety and environmental issues in the industry, storage, handling and transportation; therefore dilution of such mixtures has gained significant importance from the viewpoint of fire safety, but also due to nitrogen oxide’s emission control through flameless/mild combustion. In this paper, the propagation of the flame in C3H8-air-diluent stoichiometric gaseous mixtures using Ar, N2 and CO2 as diluents was investigated. Data were collected from dynamic pressure-time records in spherical propagating explosions, centrally ignited. The experiments
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Kodakoglu, Furkan, Sinan Demir, Damir Valiev, and V’yacheslav Akkerman. "Analysis of Gaseous and Gaseous-Dusty, Premixed Flame Propagation in Obstructed Passages with Tightly Placed Obstacles." Fluids 5, no. 3 (2020): 115. http://dx.doi.org/10.3390/fluids5030115.

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A recent predictive scenario of premixed flame propagation in unobstructed passages is extended to account for obstructions that can be encountered in facilities dealing with explosive materials such as in coalmines. Specifically, the theory of globally-spherical, self-accelerating premixed expanding flames and that of flame acceleration in obstructed conduits are combined to form a new analytical formulation. The coalmining configuration is imitated by two-dimensional and cylindrical passages of high aspect ratio, with a comb-shaped array of tightly placed obstacles attached to the walls. It
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Dissertations / Theses on the topic "Spherical flame propagation"

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Scott, Ian Stefanes. "Modelling spherical flame propagation in a closed volume." Master's thesis, University of Cape Town, 2014. http://hdl.handle.net/11427/9126.

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Includes bibliographical references.<br>The highly exothermic reaction of fuel combustion is the most common source of usable energy in the world. The fuel itself originates almost entirely from fossil fuels, such as crude oil and natural gas. The use of these fuels for energy production is under pressure in recent times due to environmental and availability concerns. This then sets the stage for combustion research aimed at providing more efficient combustion processes and characterising the combustion behaviour of alternative fuels. The laminar flame speed of a combustible mixture is a well
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Manoubi, Maha. "Combustion Characteristics for Non-homogeneous Segregated H2-Air Mixtures." Thesis, Université d'Ottawa / University of Ottawa, 2015. http://hdl.handle.net/10393/32272.

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The work presented in this thesis is an investigation of the dynamics of unconfined hydrogen-air flames in the presence of buoyant effects and the determination of an ignition criterion for flame propagation between adjacent pockets of reactive gas separated by air. The experimental work was conducted using the soap bubble technique and visualized with high speed schlieren or large scale shadowgraph systems. A study was first conducted to determine the most suitable soap solution additive among glycerol, guar and polyethylene oxide for conducting the experiments, isolating guar as the best c
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Mannaa, Ossama. "Effect of Electric Field on Outwardly Propagating Spherical Flame." Thesis, 2012. http://hdl.handle.net/10754/273076.

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The thesis comprises effects of electric fields on a fundamental study of spheri­cal premixed flame propagation.Outwardly-propagating spherical laminar premixed flames have been investigated in a constant volume combustion vessel by applying au uni-directional electric potential.Direct photography and schlieren techniques have been adopted and captured images were analyzed through image processing. Unstretched laminar burning velocities under the influence of electric fields and their associated Markstein length scales have been determined from outwardly prop­agating spherical fl
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Book chapters on the topic "Spherical flame propagation"

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Continillo, G., and W. A. Sirignano. "Unsteady, Spherically-Symmetric Flame Propagation Through Multicomponent Fuel Spray Clouds." In Modern Research Topics in Aerospace Propulsion. Springer New York, 1991. http://dx.doi.org/10.1007/978-1-4612-0945-4_10.

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Akamatsu, Fumiteru, Kazuyoshi Nakabe, Masashi Katsuki, Yukio Mizutani, and Toshikatsu Tabata. "Structure of Spark-Ignited Spherical Flames Propagating in a Droplet Cloud." In Developments in Laser Techniques and Applications to Fluid Mechanics. Springer Berlin Heidelberg, 1996. http://dx.doi.org/10.1007/978-3-642-79965-5_14.

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Nguyen, M. T., M. T. Phung, H. P. Ho, and V. Đ. Nguyen. "Optimizing a Design of Constant Volume Combustion Chamber for Outwardly Propagating Spherical Flame." In Advances in Asian Mechanism and Machine Science. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-91892-7_88.

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Conference papers on the topic "Spherical flame propagation"

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Matlo, Matyas, Farzan Parsinejad, and Hameed Metghalchi. "Schlieren and Shadowgraph Images of Transient Expanding Spherical Thin Flames." In ASME 2002 International Mechanical Engineering Congress and Exposition. ASMEDC, 2002. http://dx.doi.org/10.1115/imece2002-39318.

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Experimental facilities have been built to visualize transient expanding spherical flames. Facilities include a cylindrical chamber with two end glasses for optical observation. Shadowgraph and Schlieren pictures of flame propagation have been taken using a high speed Charged Coupled Device (CCD) camera. In this paper the optical behavior of spherical flames has been investigated using both Schlieren and Shadowgraph methods. A mathematical model has been developed to predict the intensity of refracted light beams interacting with a transient expanding thin flame. Experimental results are in ve
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Parsinejad, Farzan, and Hameed Metghalchi. "Investigation of Light Interaction With Transient Expanding Thick Flames." In ASME 2003 International Mechanical Engineering Congress and Exposition. ASMEDC, 2003. http://dx.doi.org/10.1115/imece2003-55290.

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Optical behavior of spherical flames has been investigated using Shadowgraph method. A mathematical model has been developed to predict the intensity profile of refracted light beams interacting with a transient expanding thick flame. Experimental facilities have been built to visualize transient expanding spherical flames. Facilities include a cylindrical chamber with two end glasses for optical observation. Shadowgraph pictures of flame propagation have been taken using a high speed Charged Coupled Device camera. Flame edge has been located using the mathematical model and it has been compar
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Briones, Alejandro M., and Suresh K. Aggarwal. "Ignition and Propagation Characteristics of Hydrogen-Enriched Methane Flames." In ASME Turbo Expo 2007: Power for Land, Sea, and Air. ASMEDC, 2007. http://dx.doi.org/10.1115/gt2007-28132.

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The effects of H2 enrichment on the ignition and propagation of laminar CH4-air flames in axisymmetric coflowing jets are numerically investigated. A comprehensive, time-dependent computational model, which employs a detailed description of chemistry and transport, is used to simulate the transient ignition and flame propagation phenomena. Because fuel-air mixtures can potentially be ignited due to the presence of either a high-temperature zone or a radical pool, we explore temperature-induced ignition and radical-pool-induced ignition. It is observed overall that radical-pool-induced ignition
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Haq, M. Z. "Prediction of Instabilities of Spherically Propagating Flames in Laminar Premixture." In ASME 2003 Heat Transfer Summer Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/ht2003-47484.

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A spherically expanding flame in a quiescent premixture is a bifurcation phenomenon, in which the flame becomes unstable at a radius, greater than some critical value, while remaining stable below that critical radius. Beyond this critical radius, developing instabilities are initiated by propagating cracks to form a coherent structure covering the entire flame surface and flame accelerates. The present paper reports a schlieren photographic study of spherical flame propagation in methane–air, iso-octane–air and n-heptane–air premixtures at different initial conditions where the onset of insta
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Barone, Mario, Nabiha Chaumeix, Andrea Comandini, Gaetano Continillo, Simone Lombardi, and Damien Nativel. "Unsupervised analysis of experiments of laminar flame propagation in a spherical enclosure." In INTERNATIONAL CONFERENCE OF COMPUTATIONAL METHODS IN SCIENCES AND ENGINEERING 2016 (ICCMSE 2016). Author(s), 2016. http://dx.doi.org/10.1063/1.4968710.

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Baust, Tobias, Peter Habisreuther, and Nikolaos Zarzalis. "Determination of Laminar Flame Speed and Markstein Numbers Deduced From Turbulent Flames Using the Bomb Method." In ASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/gt2016-57305.

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The flame speed is a central element not only in theoretical combustion and basic research but also a key parameter for several combustion models. Various methods to define and measure laminar flame speed have been applied. One method that is being relevant to determine flame speed and flame stretch (quantified by Markstein numbers) under high pressure and high temperature conditions is the bomb method, where an unsteady spherical expanding flame is investigated in a closed vessel. Especially for higher pressures, instabilities occur in the flame front of spherically expanding flames, due to t
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Parajuli, Pradeep, Tyler Paschal, Mattias A. Turner, Eric L. Petersen, and Waruna D. Kulatilaka. "High-Speed Spectrally Resolved Imaging Studies of Spherically Expanding Natural Gas Flames Under Gas Turbine Operating Conditions." In ASME Turbo Expo 2019: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/gt2019-91752.

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Abstract Natural gas is a major fuel source for many industrial and power-generation applications. The primary constituent of natural gas is methane (CH4), while smaller quantities of higher order hydrocarbons such as ethane (C2H6) and propane (C3H8) can also be present. Detailed understanding of natural gas combustion is important to obtain the highest possible combustion efficiency with minimal environmental impact in devices such as gas turbines and industrial furnaces. For a better understanding the combustion performance of natural gas, several important parameters to study are the flame
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Trianti, Nuri, Kosuke Motegi, Tomoyuki Sugiyama, and Yu Maruyama. "Computational Study on the Spherical Laminar Flame Speed of Hydrogen-Air Mixtures." In 2020 International Conference on Nuclear Engineering collocated with the ASME 2020 Power Conference. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/icone2020-16841.

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Abstract The computational fluid dynamics (CFD) have been developed to analyze the correlation equation for laminar flame speed of hydrogen-air mixtures. This analysis was carried out on the combustion of hydrogen-air mixtures performed at the spherical bomb experiment facility consists of a spherical vessel equipped (563 mm internal diameter). The facility has been designed and built at CNRS-ICARE laboratory. The simulation was carried out using the reactingFoam solver, one of a transient chemical reaction solver in OpenFOAM 5.0. The LaunderSharmaKE model was applied for turbulent flow. The i
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Pugh, Daniel, Andrew Crayford, Philip Bowen, Tim O’Doherty, and Richard Marsh. "Variation in Laminar Burning Velocity and Markstein Length With Water Addition for Industrially Produced Syngases." In ASME Turbo Expo 2014: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/gt2014-25455.

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An outwardly propagating spherical flame has been used to characterise the influence of water addition on the combustion of variable steelworks gas compositions. Attention was given to the ratio of hydrogen and carbon monoxide within blast furnace gas, and the catalysing influence of water addition on the preponderant reaction kinetics. A nonlinear extrapolative technique was used to obtain values of laminar burning velocity and Markstein length for atmospheric combustion with air and change in equivalence ratio. Four disparate blast furnace gas mixtures were tested with increasing volumetric
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Parsinejad, Farzan, Edwin Shirk, and Hameed Metghalchi. "Reformed Fuel and Its Properties, Burning Speeds and Flame Characteristics." In ASME 2005 International Mechanical Engineering Congress and Exposition. ASMEDC, 2005. http://dx.doi.org/10.1115/imece2005-80047.

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Premixed, lean burn combustion research has been focused for years on extending the lean flammability limit while maintaining both stable ignition and turbulent flame propagation. Burning speed is a fundamental physicochemical property of homogenous fuel/oxygen/diluent mixtures. It determines the rate of energy released during combustion and is of basic importance for developing and testing chemical kinetic models of hydrocarbons. The burning speed and flame structure of blends of reformed fuel and Methane-air mixtures have been studied using two similar constant volumes; a cylindrical vessel
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