Primary Polluationts From Pulse Combustors

The aim of this study is to improve a phenomenological model for pulsating combustion by predicting characteristics of primary pollutants Nox and Co, as well as well ad minor combustion sprecies. The phenomenological thermo-fluid pulse combustor model previously presented has been developed to provide predictions of primary pollutant characteristics through integration with a detailed kinetic mechanism (GRI-Mech 2.11) and a reduced kinetic model, both provided from the CHEMKIN site. Homogeneous methane – air mixtures have been modeled across a range of practical , fuel – lean operating conditions, and predictions of primary pollutants from both models have been compared with available data. Oscillatory characteristics of combustion species are generated, and consistent with published data, the optimum operating conditions of the combustor are predicted to be around equivalence ratio of 0.74. where very low NOx and CO are found of only a few ppm. Perhaps surprisingly, compared against experimental data available, the NOx and CO predictions utilizing the reduced mechanism apparently provide better agreement than that using the detailed GRRI-Mech. 2.11.

Keywords:

Pollutant - pulse combustor , modeling