ONE-DIMENSIONAL MODELING PREDICTIONS ON THE CHARACTERISTICS OF A CI ENGINE WITH DIESEL AND BIODIESEL BLEND
Original scientific paper
DOI:
https://doi.org/10.2298/CICEQ250615002SKeywords:
one-dimensional engine simulation model, biodiesel, diesel engine, emission, combustionAbstract
The current study focused on utilizing an advanced modeling technique to create a one-dimensional model to analyze the full-cycle calculation of a compression ignition (CI) engine fuelled with a biodiesel blend to explore its performance and emission characteristics. The developed model is to solve the equations that govern conservation of energy and mass, which is used to find the rapid changes of gas exchange and combustion process as a function of crank angle degree. The combustion chamber was created as a one-dimensional model by simulation software, comprising two distinct zones: burned and unburned gases. Heat release and emission predictions were derived using simplified reaction mechanisms. The developed combustion model was integrated as a sub-model within the cylinder element of the one-dimensional solver, enabling the exchange of critical parameters such as cylinder pressure, mass fraction burned, and heat release rate at each crank-angle increment. The work focused on comparing the peak pressure, heat release rate, oxides of nitrogen, smoke, carbon monoxide, and brake specific fuel consumption of the created model with those of the results obtained from the experimental engine. By comparing the theoretical and experimental results, it was inferred that the theoretical model resulted in comparatively higher peak pressure (41%), higher heat release rate (10.38%), lower carbon monoxide (31%), and lower brake specific fuel consumption (4.7%) than that of the experimental engine for the biodiesel blend. The results of the current study showcased the feasibility of utilizing biodiesel in CI engines with better characteristics, which address the sustainable development goals.
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