Author(s)

S. Kabar & M. Kadja

Abstract

In order to minimise the planet heating observed during recent years, many studies have been undertaken on the different factors responsible for this atmospheric pollution, among which are the studies of the physical and chemical phenomena occurring in combustion. In order to diminish the polluting gases emanating from I.C. engines, the idea is to lower fuel consumption while maintaining engine performance. In this context, we numerically calculated the concentration of different polluting species (CO, CO2, HC and NO) by using the commercial programme KIVA2 for four fuels (DF2, C8H18, C7H16, and C14H13) in a direct injection diesel engine of type CMT/FL912. The Zeldovich chemical reactions for the formation of NO, the global fuel oxidation reaction and the equilibrium reactions contributing to the formation of pollutants have been introduced. A comparison of polluting species of various fuels obtained after combustion is presented. Keywords: KIVA2 code, diesel engine, turbulent combustion, polluting gases, fuels. 1 Introduction During the last two decades, energy demand in the world has increased. The prices of fossil fuels have increased and the ecological repercussions due to the emissions of polluting gases CO, CO2 and NOX have become worrisome, particularly the rate of CO2 in the atmosphere which is continuously increasing and which results in global heating. The shortage and the depletion of conventional energy resources are also one of the major concerns for western countries. This has incited scientists to develop alternate fuels such as bio fuels,

Keywords

KIVA2 code, diesel engine, turbulent combustion, polluting gases, fuels.