%0 Conference Paper %1 pitsch1996numerical %A Pitsch, Heinz %A Peters, Norbert %A Seshadri, K. %B 26th International Symposium on Combustion, The Combustion Institute %D 1996 %K prev %P 763-771 %T Numerical and asymptotic studies of the structure of premixed iso-octane flames %V 1-2 %X Numerical calculations and rate-ratio asymptotic analysis are performed to obtain the structure and burning velocities of premised iso-octane flames. The numerical calculations employ a detailed chemical kinetic mechanism comprising 967 elementary reactions, a skeletal chemical-kinetic mechanism comprising 47 elementary reactions, and a reduced chemical-kinetic mechanism for lean to stoichiometric conditions made up of sire overall reactions among nine species including the hydrogen radical. The values of burning velocities calculated numerically using the detailed, skeletal, and reduced chemical-kinetic mechanisms are found to agree well with each other as well as with previous measurements. The asymptotic structure of stoichiometric and lean flames is analyzed using a reduced chemical-kinetic mechanism comprising five overall reactions. This mechanism is deduced from the reduced chemical kinetic mechanism employed in the numerical calculations after introducing steady-state approximation for the hydrogen radical. In the analysis, the flame structure is presumed to consist of three zones-a preheat zone of thickness of order unity, a thin reaction zone, and a postflame zone. In the reaction zone, the chemical reactions are presumed to take place in three layers-an inner layer, a C3H4-consumption laver, and a H-2-CO oxidation laver. Within the inner laver, the fuel iso-octane is consumed in a thin sublayer and i-C4H8 is formed, which subsequently reacts with radicals to form the intermediate hydrocarbon compound C3H4. This intermediate hydrocarbon is consumed in the C3H4-consumption layer in the inner layer and the C3H4-consumption layer H-2 and CO are formed. Most of the final products CO2 and H2O are formed in the H-2-CO oxidation laver. In this layer, H-2 is presumed to be in steady slate everywhere except in a thin sublayer called the H-2-consumption layer. The bunting velocities calculated using the results of the asymptotic analysis are found to agree reasonably well with those calculated numerically using the detailed. skeletal, and reduced chemical-kinetic mechanisms and with previous measurements.

@inproceedings{pitsch1996numerical, abstract = {Numerical calculations and rate-ratio asymptotic analysis are performed to obtain the structure and burning velocities of premised iso-octane flames. The numerical calculations employ a detailed chemical kinetic mechanism comprising 967 elementary reactions, a skeletal chemical-kinetic mechanism comprising 47 elementary reactions, and a reduced chemical-kinetic mechanism for lean to stoichiometric conditions made up of sire overall reactions among nine species including the hydrogen radical. The values of burning velocities calculated numerically using the detailed, skeletal, and reduced chemical-kinetic mechanisms are found to agree well with each other as well as with previous measurements. The asymptotic structure of stoichiometric and lean flames is analyzed using a reduced chemical-kinetic mechanism comprising five overall reactions. This mechanism is deduced from the reduced chemical kinetic mechanism employed in the numerical calculations after introducing steady-state approximation for the hydrogen radical. In the analysis, the flame structure is presumed to consist of three zones-a preheat zone of thickness of order unity, a thin reaction zone, and a postflame zone. In the reaction zone, the chemical reactions are presumed to take place in three layers-an inner layer, a C3H4-consumption laver, and a H-2-CO oxidation laver. Within the inner laver, the fuel iso-octane is consumed in a thin sublayer and i-C4H8 is formed, which subsequently reacts with radicals to form the intermediate hydrocarbon compound C3H4. This intermediate hydrocarbon is consumed in the C3H4-consumption layer in the inner layer and the C3H4-consumption layer H-2 and CO are formed. Most of the final products CO2 and H2O are formed in the H-2-CO oxidation laver. In this layer, H-2 is presumed to be in steady slate everywhere except in a thin sublayer called the H-2-consumption layer. The bunting velocities calculated using the results of the asymptotic analysis are found to agree reasonably well with those calculated numerically using the detailed. skeletal, and reduced chemical-kinetic mechanisms and with previous measurements. }, added-at = {2013-03-21T15:13:41.000+0100}, author = {Pitsch, Heinz and Peters, Norbert and Seshadri, K.}, biburl = {https://www.bibsonomy.org/bibtex/214c9df68e90a550a097ccb4538dd05c1/itv}, booktitle = {26th International Symposium on Combustion, The Combustion Institute}, interhash = {cf778921ddd90a7a5c630295b4cbd391}, intrahash = {14c9df68e90a550a097ccb4538dd05c1}, keywords = {prev}, pages = {763-771}, timestamp = {2014-07-31T07:46:38.000+0200}, title = {Numerical and asymptotic studies of the structure of premixed iso-octane flames}, volume = {1-2}, year = 1996 }