Abstract
A detailed experimental study of the nine isomers of heptane has been performed in a rapid compression machine. Our interest lies in determining the role of molecular structure of the C7H16 hydrocarbons oil the rate of combustion of the various isomers. Ignition delay times were measured, and their dependence on the reaction conditions of temperature and pressure was studied, and in this way comparative reactivity profiles of the different isomers were obtained. Stoichiometric fuel and air mixtures were studied in each case, at compressed gas pressure of 10, 15, and 20 atm for the n-heptane study, and at 15 atm for all other isomers, in the compressed gas temperature range of 640-960 K. Characteristic negative temperature coefficient behaviour was observed for each of the isomers. The more branched isomeric forms of heptane exhibited reduced reactivity, which correlated with the research octane number. In addition, the influence of fuel structure on burn rate was also studied. It was found that, similar to overall reactivity, the burn rate decreased with increasing octane number. (c) 2004 The Combustion Institute. Published by Elsevier Inc. All rights reserved.
| Original language | English (Ireland) |
|---|---|
| Pages (from-to) | 2639-2647 |
| Number of pages | 9 |
| Journal | Proceedings Of The Combustion Institute |
| Volume | 30 |
| DOIs | |
| Publication status | Published - 1 May 2005 |
| Event | 30th International Symposium on Combustion - Chicago, IL, United States Duration: 25 Jul 2004 → 30 Jul 2004 |
Keywords
- Burn rate
- Detailed chemical kinetic modeling
- Heptane isomers
- Negatice temperature coefficient
- Rapid compression
Authors (Note for portal: view the doc link for the full list of authors)
- Authors
- Silke, EJ,Curran, HJ,Simmie, JM