Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
CHARACTERIZATION OF FLAME DEVELOPMENT IN THE FIRST CYCLES OF OPERATION IN A DIRECT INJECTION SPARK IGNITION ENGINE FUELED WITH ANHYDROUS ETHANOL
Submission Author:
Maycon Silva , SP
Co-Authors:
Maycon Silva, santiago daniel martinez boggio, Pedro Lacava
Presenter: Maycon Silva
doi://10.26678/ABCM.COBEM2017.COB17-0699
Abstract
The development of more efficient engines with lower emissions of pollutants depend on detailed experimental information on the early stages of the spark ignition process. In relation to the efficiency of the combustion inside the cylinder, the formation of the flame has great influence, mainly in spark ignition (SI) engine of direct injection (DI). The present work has the objective to study the evolution of the flame kernel in the first cycles of operation when is fuelled with ethanol. A detailed analysis is presented on cycle-to-cycle variations and misfire cycles. In cylinder pressure, measurements were recorded synchronized with high-speed 2D flame images. The experimental apparatus involves a single cylinder SI-DI research engine with optical access and a high-speed camera coupled with a double intensifier module. The test conditions were set at 900 rpm and partial open throttle. The study of the start of the engine operation with ethanol and the development of new strategies allows to the future the increment of use of this alternative fuel in commercial cars. The results for pure ethanol indicate that flame propagation speed increase to a relatively constant value with the increment of cycles. Also, suggest an increase in the flame area with the increase in the cycles of operation and decrease in the flame deformation.
Keywords
Combustion, ethanol, SI Engines, First Cycles, Direct injection
