VII PTNSS Congress - 27th-29th June 2017
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Modelling of the influence of hydrocarbon components of diesel and Jet fuels on combustion process

The aim of this paper is presentation of the possibility of combustion processes modelling so that to better describe the influence of fuels chemistry on fuels combustion. This is important for prediction the behaviour of different alternative fuels in processes in combustion chamber. Currently used mathematical models do not sufficiently take into account the influence of synthetic components, mainly synthetic hydrocarbons on such processes as fuels atomization, fuels evaporation and finally fuels burning in engines operating under different conditions. The idea of new mathematical model is proposed in this paper. This proposed model is based on SAE International standard ARP 1533, which describes relation between fuels chemical composition and concentration of CO2, CO, H2O, CxHy and NOx in exhaust gases. Fuels composition is expressed by average molecular chemical formula. The same formula can represent fuels of different composition and different chemical properties. The idea is to replace average molecular chemical formula by coefficient of fuels reactivity f. This coefficient, related to complex burning process can be expressed as the sum of coefficients of fuels reactivity, each related to simple process modeled by appropriate laboratory test. These tests should enable connection the thermodynamic actions with the kinetic of chemical reactions running due to this actions. The paper presents the algorithm of this new model verification and the results of its preliminary verification using MiniJetRig and laboratory tests suitable for Jet fuels.
Topic: Modelling and optimization of engine processes
Author: ANDRZEJ KULCZYCKI
Co-authors: -