Abstract
<jats:p>In this study, the authors analysed the importance of spraying and atomisation in the combustion of alternative liquid fuels derived from biomass pyrolysis. They scientifically substantiated the formation of droplets resulting from the primary and secondary decomposition of alternative liquid fuels exiting the injector, their spatial distribution and the evaporation processes. The study found that the spray cone angle, spray distance and formation of spray zones can ensure effective fuel-air mixing in the combustion chamber. The results demonstrate the importance of optimising atomisation processes in increasing the combustion efficiency of alternative liquid fuels obtained from biomass pyrolysis and reducing fuel consumption and harmful emissions into the atmosphere.</jats:p>