Simulação computacional unidimensional de motor Ricardo Proteus ciclo otto utilizando gasolina, etanol e GNV

Abstract

One of the predominant methods employed in the development of contemporary engines is computer simulation. This technique involves virtually modeling the primary geometric characteristics of an engine to anticipate its performance under different boundary conditions. It is imperative to validate the model through comparison with experimental data, to consider it reliable. The objective of this work was to validate a computational model of the Ricardo Proteus Otto Cycle single-cylinder research engine, operated with different fuels, such as gasoline, ethanol and CNG. The validation was carried out under specific operational conditions: full load and 1800 rpm, using the GT-POWER software. The process started with physical measurements of engine characteristics. This involved determining the load discharge coefficients through bench flow analysis, measuring valve lift and running tests on a bench dynamometer. The experimental data were then used to start the modeling and validation process. The disparities observed in the parameters chosen for validation were all less than 5%. Consequently, the results state that the developed computational model was successfully validated and can be considered reliable to perform analyzes on the engine operation.