Results 171 to 180 of about 44,661 (206)
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Combustion Theory and Modelling, 2009
The effects of flow compression and flame stretch on the accurate determination of laminar flame speeds at normal and elevated pressures using propagating spherical flames at constant pressure or constant volume are studied theoretically and numerically.
Z. Chen, M. P. Burke, Y. Ju
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The effects of flow compression and flame stretch on the accurate determination of laminar flame speeds at normal and elevated pressures using propagating spherical flames at constant pressure or constant volume are studied theoretically and numerically.
Z. Chen, M. P. Burke, Y. Ju
openaire +1 more source
Image intensification with high-speed videography for flame propagation studies
SPIE Proceedings, 1990In the past, analysis of flame propagations within a spark ignition engine combustion chamber has been analyzed with pressure diagrams. These pressure diagrams have helped to develop the geometry within the combustion chamber. Photographing or electronically imaging the flame propagations are very important in the visualization of combustion ...
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Proceedings of the Combustion Institute, 2019
Abstract Laminar burning velocities are of great importance in many combustion models as well as for validation and improvement of chemical kinetic schemes. Determining laminar burning velocities with high accuracy is quite challenging and different approaches exist.
J. Beeckmann +5 more
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Abstract Laminar burning velocities are of great importance in many combustion models as well as for validation and improvement of chemical kinetic schemes. Determining laminar burning velocities with high accuracy is quite challenging and different approaches exist.
J. Beeckmann +5 more
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Combustion and Flame, 2011
Abstract Large discrepancies among the laminar flame speeds and Markstein lengths of methane/air mixtures measured by different researchers using the same constant-pressure spherical flame method are observed. As an effort to reduce these discrepancies, one linear model (LM, the stretched flame speed changes linearly with the stretch rate) and two ...
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Abstract Large discrepancies among the laminar flame speeds and Markstein lengths of methane/air mixtures measured by different researchers using the same constant-pressure spherical flame method are observed. As an effort to reduce these discrepancies, one linear model (LM, the stretched flame speed changes linearly with the stretch rate) and two ...
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Structure and propagation speeds of turbulent premixed flames—A numerical study
Combustion and Flame, 1991Abstract The aim of the work was to gain understanding of turbulent premixed flames, particularly the local flame speed and structure. Full numerical simulations were made for flames (with simple reactions and Lewis number unity) propagating in a constant density, isotropic turbulent flow; the Reynolds and Damkohler numbers were varied.
Sherif H. El Tahry +2 more
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Effects of electric field intensity and distribution on flame propagation speed of CH4/O2/N2 flames
Fuel, 2015Abstract In order to study the effects of electric field intensity and distribution on flame propagation speed, the paper investigated the flame propagation of premixed CH 4 /O 2 /N 2 mixtures under direct-current (DC) electric fields at an excess air ratio of 1.4.
Hao Duan +6 more
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Combustion and Flame, 2003
Local propagation speeds and stretch rates were measured along a premixed flame that undergoes unsteady wrinkling in order to see if these two quantities correlate in the manner that is predicted by the theory of flame stretch. The Markstein number, which relates these two quantities, also was measured.
Jose O. Sinibaldi +4 more
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Local propagation speeds and stretch rates were measured along a premixed flame that undergoes unsteady wrinkling in order to see if these two quantities correlate in the manner that is predicted by the theory of flame stretch. The Markstein number, which relates these two quantities, also was measured.
Jose O. Sinibaldi +4 more
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Proceedings of the Combustion Institute, 2019
Abstract The outwardly propagating spherical flame (OPF) method is popularly used to measure the laminar flame speed (LFS). Recently, great efforts have been devoted to improving the accuracy of the LFS measurement from OPF. In the OPF method, several assumptions are made.
Mahdi Faghih +4 more
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Abstract The outwardly propagating spherical flame (OPF) method is popularly used to measure the laminar flame speed (LFS). Recently, great efforts have been devoted to improving the accuracy of the LFS measurement from OPF. In the OPF method, several assumptions are made.
Mahdi Faghih +4 more
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Low-speed pre-ignition and super-knock in boosted spark-ignition engines: A review
Progress in Energy and Combustion Science, 2023Kristian Rönn
exaly
High-speed sequential deposition of photoactive layers for organic solar cell manufacturing
Nature Energy, 2022Christoph J Brabec, Yongfang Li, Jie Min
exaly