Laminar burning velocities at high pressure for primary reference fuels and gasoline: Experimental and numerical investigation
Abstract
Spherical flames of n-heptane, iso-octane, PRF 87 and gasoline/air mixtures are experimentally investigated to determine laminar burning velocities and Markstein lengths under engine-relevant conditions by using the constant volume bomb method. Data are obtained for an initial temperature of 373 K, equivalence ratios varying from {phi}=0.7 to {phi}=1.2, and initial pressures from 10 to 25 bar. To track the flame front in the vessel a dark field He-Ne laser Schlieren measurement technique and digital image processing were used. The propagating speed with respect to the burned gases and the stretch rate are determined from the rate of change of the flame radius. The laminar burning velocities are obtained through a linear extrapolation to zero stretch. The experimentally determined Markstein numbers are compared to theoretical predictions. A reduced chemical kinetic mechanism for n-heptane and iso-octane was derived from the Lawrence Livermore comprehensive mechanisms. This mechanism was validated for ignition delay times and flame propagation at low and high pressures. In summary an overall good agreement with the various experimental data sets used in the validation was obtained. (author)
- Authors:
-
- RWTH, Aachen (Germany)
- Department of Mechanical Engineering, Stanford University, CA (United States)
- Publication Date:
- OSTI Identifier:
- 21137917
- Resource Type:
- Journal Article
- Journal Name:
- Combustion and Flame
- Additional Journal Information:
- Journal Volume: 156; Journal Issue: 2; Other Information: Elsevier Ltd. All rights reserved; Journal ID: ISSN 0010-2180
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; GASOLINE; PRESSURE RANGE MEGA PA 01-10; HEPTANE; OCTANE; AIR; VELOCITY; EXPERIMENTAL DATA; EXTRAPOLATION; FLAMES; SPHERICAL CONFIGURATION; MIXTURES; VALIDATION; FLAME PROPAGATION; ENGINES; TIME DELAY; IGNITION; COMBUSTION KINETICS; Primary reference fuels; Laminar burning velocities; Reduced kinetic mechanisms
Citation Formats
Jerzembeck, S, Peters, N, Pepiot-Desjardins, P, and Pitsch, H. Laminar burning velocities at high pressure for primary reference fuels and gasoline: Experimental and numerical investigation. United States: N. p., 2009.
Web. doi:10.1016/J.COMBUSTFLAME.2008.11.009.
Jerzembeck, S, Peters, N, Pepiot-Desjardins, P, & Pitsch, H. Laminar burning velocities at high pressure for primary reference fuels and gasoline: Experimental and numerical investigation. United States. https://doi.org/10.1016/J.COMBUSTFLAME.2008.11.009
Jerzembeck, S, Peters, N, Pepiot-Desjardins, P, and Pitsch, H. 2009.
"Laminar burning velocities at high pressure for primary reference fuels and gasoline: Experimental and numerical investigation". United States. https://doi.org/10.1016/J.COMBUSTFLAME.2008.11.009.
@article{osti_21137917,
title = {Laminar burning velocities at high pressure for primary reference fuels and gasoline: Experimental and numerical investigation},
author = {Jerzembeck, S and Peters, N and Pepiot-Desjardins, P and Pitsch, H},
abstractNote = {Spherical flames of n-heptane, iso-octane, PRF 87 and gasoline/air mixtures are experimentally investigated to determine laminar burning velocities and Markstein lengths under engine-relevant conditions by using the constant volume bomb method. Data are obtained for an initial temperature of 373 K, equivalence ratios varying from {phi}=0.7 to {phi}=1.2, and initial pressures from 10 to 25 bar. To track the flame front in the vessel a dark field He-Ne laser Schlieren measurement technique and digital image processing were used. The propagating speed with respect to the burned gases and the stretch rate are determined from the rate of change of the flame radius. The laminar burning velocities are obtained through a linear extrapolation to zero stretch. The experimentally determined Markstein numbers are compared to theoretical predictions. A reduced chemical kinetic mechanism for n-heptane and iso-octane was derived from the Lawrence Livermore comprehensive mechanisms. This mechanism was validated for ignition delay times and flame propagation at low and high pressures. In summary an overall good agreement with the various experimental data sets used in the validation was obtained. (author)},
doi = {10.1016/J.COMBUSTFLAME.2008.11.009},
url = {https://www.osti.gov/biblio/21137917},
journal = {Combustion and Flame},
issn = {0010-2180},
number = 2,
volume = 156,
place = {United States},
year = {Sun Feb 15 00:00:00 EST 2009},
month = {Sun Feb 15 00:00:00 EST 2009}
}