Investigations of the Effect of Humid Air on NOX & PM Emissions of a CNG Engine
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2016-09-30
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Edition:8/15/15 - 9/1/16
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Abstract:Numerical and experimental investigations of the effect of a humid air system on nitrogen oxides (NOx) and Particulate Matter (PM) emissions of a compressed natural gas (CNG) engine have been performed. For the numerical modeling, non-premixed combustion in a single cylinder was simulated using the presumed probability density function combustion model. Simulations were performed for dry as well as humid air intake, ranging from 5% to 30% relative humidity (RH). Numerical results have shown 40% reduction in NO emission at 10% relative humidity, when compared with the corresponding emission with dry intake air. With 15% and 30% relative humidity levels, NO emission were reduced by 65% and 93% respectively.
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