Eventos Anais de eventos
ENCIT 2016
16th Brazilian Congress of Thermal Sciences and Engineering
STUDY OF WATER EFFECT ON THE PERFORMANCE OF A SPARK IGNITED ENGINE OPERATING WITH WET ETHANOL
Submission Author:
Rafael Sari , RS , Brazil
Co-Authors:
Fernando Pereira, Diego Golke, Mario Martins
Presenter: Rafael Sari
doi://10.26678/ABCM.ENCIT2016.CIT2016-0427
Abstract
Simulation is a very effective tool to reduce test bench time and to provide measurements that are often very difficult or too expensive to make in internal combustion engines. With combustion, detailed computational approaches are intrinsically complex due to its non-linear behaviour. It often requires a thorough analysis in order to model phenomena like flame quenching and non-ignition leading to high computational cost. Thus, simplified phenomenological models incorporating some mean flow characteristics and geometrical parameters are developed and extensively applied to achieve mean results, allowing the use of design of experiment (DoE) techniques. Hence, this work intends to calibrate a phenomenological turbulent combustion model using experimental data in order to allow engine optimization through computational simulation. Thus pressure traces, fuel and air mass flow and geometrical values were acquired from the engine under test for boundary operation conditions. A 3-D steady state non-reacting flow simulation was performed to obtain information regarding as swirl and tumble. The results were used as boundary conditions for the combustion model in the 1-D simulation. Computational results were compared with experimental data showing good agreement for combustion parameters such as ignition delay and total combustion duration as well as main engine performance parameters, confirming the model’s capability to simulate real test conditions.
Keywords
INTERNAL COMBUSTION ENGINES, Turbulent combustion, Computational simulation, WET ETHANOL
