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Experimental analysis of combusti on in CI engines is difficult due to the very short
duration of this process and the unfavourable thermodynamic conditions prevailing in the
combustion chamber (high pressure and temperature). An alternative is to perform numerical
calculations using the CFD method based on a defined combustion model. Such an approach
was used in this paper to investigate the influence of different fuel injection configurations and
different swirl ratio on selected parameters of the combustion process in the designed two -
stroke opposed piston engine.The combustion chamber of the tested engine was formed of two movable surfaces of pistons.The AVL Fire software was used to perform the simulation. As a result of
the calculations, the dependence of rate of heat release, burnt mass fraction, mean pressure in
cylinder and heat transfer coefficient on defined calculation cases was obtained. In addition, a
spatial distribution of the combustion stream of injected fuel was obtained. On the basis of the
results obtained, conclusions regarding the impact of the fuel injection configuration and the
swirl ratio on the obtained engine performance were presented.
