Title

Characteristics of ammonia-nitric oxide combustion

Document Type

Conference Proceeding

Publication Date

1-1-2003

Publication Title

Proceedings of the 2003 International Joint Power Generation Conference

First Page

771

Keywords

Ammonia, GRI 3.0, Miller-Bowman 1989, Nitric oxide: CHEMKIN

Last Page

777

Abstract

The combustion characteristics of premixed ammonia-nitric oxide mixtures at atmospheric and elevated conditions were numerically examined. The laminar burning velocity, flame temperature and flammability limits were determined using the GRI 3.0 and the Miller-Bowman 1989 reaction mechanisms in CHEMKIN. A freely propagating adiabatic flame was assumed to facilitate the investigation. The laminar burning velocities and the flammability limits predicted with the two mechanisms were compared with experimental values measured in a constant volume combustion chamber. The predicted flammability limits are at ammonia-nitric oxide equivalence ratios of 0.2 and 3.5. The predicted laminar burning velocity increases with the unburnt mixture temperature and decreases with the pressure with a peak value at ammonia-nitric oxide equivalence ratio of 0.9. The Miller-Bowman 1989 mechanism predicts results closer to the measured values than the GRI 3.0 mechanism when the laminar burning velocity is concerned. For the adiabatic flame temperature, the predictions from both mechanisms agree well with each other.

DOI

10.1115/ijpgc2003-40111

ISBN

0791836924,9780791836927

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