Eventos Anais de eventos
ENCIT 2018
Brazilian Congress of Thermal Sciences and Engineering
COMPARATIVE ANALYSIS OF HEAT TRANSFER COEFICIENT APPLIED TO SPARK IGNITION COMBUSTION ENGINES
Submission Author:
Cassio Yared , PR
Co-Authors:
Cassio Yared, Stephan Hennings Och, Luís Mauro Moura
Presenter: Luís Mauro Moura
doi://10.26678/ABCM.ENCIT2018.CIT18-0182
Abstract
In the present work a comparative analysis of different correlations was performed to calculate the convection coefficient applied to the heat exchange between the working fluid and the internal walls of the combustion chamber of a spark ignition engine. This analysis was conducted through computational modeling, implemented in a two-zone combustion model. The rate of energy release is obtained through Wiebe functions. The calibration of the model was performed by means of experimental data obtained from a single cylinder test engine. The results showed that, except for Sitkei’s correlation, all of the others reach a good level of precision. Also, it could be seen that Woschini’s correlations had the highest degree of precision when determining the heat transfer between the working fluid and the walls.
Keywords
convection coefficient, two-zone modeling, Combustion, Spark ignition engines
