Numerical Calculation of Quench Distance for Laminar Premixed Flames Under Engine Relevant Conditions The University of British Columbia

Format:

Conference/Event

Author/Creator:

Turcios, Turcios, author.

Contributor:

Huang, Jim

Ollivier-Gooch, Carl

Conference Name:

SAE International Powertrains, Fuels and Lubricants Meeting (2011-08-30 : Kyoto, Japan)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2011

Summary:

The quenching of premixed laminar flames at various constantpressures was studied through numerical simulation, with theTrajectory Generated Lower Dimensional Manifold (TGLDM) method usedto employ detailed chemical mechanisms for stoichiometric methaneand heptane flames. The method was validated at lower pressures andwall temperatures. The laminar flame speed predicted by the TGLDMmethod agrees reasonably well with experimental data reported inthe literature. The peak heat flux at quenching was found to beunder-predicted by 30-40% of the most current experimentaldata.The quench distance was calculated for pressures of 1, 2, 20 and40 bar, with wall temperatures of 300 and 600 K and fresh gastemperature of 300 K. The quench distance was found to decreasewith increasing pressure in a manner similar to previous studies.The value of quench distance for heptane was found to be smallerthan that of methane by a factor of ~30% over all pressures.The peak heat flux values were used to evaluate the thermalmodel of Boust and others, for calculating quench distance and wasfound to predict the right trend, though the quench distance valuesare lower than those observed in experiment. The applicability ofthese results to internal combustion engines is briefly discussedby calculating a rough estimate of the fuel left unburned in thequenching layer for a spark-ignited engine, and a proposal for thecomputational implementation of Boust's thermal model isexplained

Notes:

Vendor supplied data

Publisher Number:

2011-01-1997

Access Restriction:

Restricted for use by site license