Abstract

The relative effects of turbulent dissipation and chemical reaction time scales on CO and NO formation from CH4, combustion are qualitatively assessed. Due consideration is given to the respective roles played by the initial magnitude of the temperature fluctuations and their rate of change. Thus, it is shown that concentration levels of CO and NO increase with increasing temperature fluctuations at the start of reaction and that long characteristic dissipation times favor pollutant formation. For initially large levels of temperature fluctuations the results indicate that pollutant generation is essentially independent of the way temperature fluctuations evolve with time.

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