Full Chemical Kinetic Simulation of Biogas Early Phase Combustion in SI Engines

Avulapati, Madan Mohan and Anand, TNC and Ravikrishna, RV (2013) Full Chemical Kinetic Simulation of Biogas Early Phase Combustion in SI Engines. In: Energy and Fuels, 27 (1). pp. 197-207.

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Abstract

This paper presents computational work on the biogas early phase combustion in spark ignition (SI) engines using detailed chemical kinetics. Specifically, the early phase combustion is studied to assess the effect of various ignition parameters such as spark plug location, spark energy, and number of spark plugs. An integrated version of the KIVA-3V and CHEMKIN codes was developed and used for the simulations utilizing detailed kinetics involving 325 reactions and 53 species The results show that location of the spark plug and local flow field play an important role. A central plug configuration, which is associated with higher local flow velocities in the vicinity of the spark plug, showed faster initial combustion. Although a dual plug configuration shows the highest rate of fuel consumption, it is comparable to the rate exhibited by the central plug case. The radical species important in the initiation of combustion are identified, and their concentrations are monitored during the early phase of combustion. The concentration of these radicals is also observed to correlate very well with the above-mentioned trend.Thus, the role of these radicals in promoting faster combustion has been clearly established. It is also observed that the minimum ignition energy required to initiate a self-sustained flame depends on the flow field condition in the vicinity of the spark plug.Increasing the methane content in the biogas has shown improved combustion.

Item Type:	Journal Article
Publication:	Energy and Fuels
Publisher:	American Chemical Society
Additional Information:	Copyright for this article belongs to the American Chemical Society
Department/Centre:	Division of Mechanical Sciences > Mechanical Engineering
Date Deposited:	02 Apr 2013 09:32
Last Modified:	02 Apr 2013 09:32
URI:	http://eprints.iisc.ac.in/id/eprint/45981

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