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COBEM 2019
25th International Congress of Mechanical Engineering
EULER-LAGRANGE 3D SIMULATION OF ETHANOL INJECTED IN A QUIESCENT AIR CHAMBER
Submission Author:
Bruno Silva de Lima , MG
Co-Authors:
Bruno Silva de Lima, Rafael Silva de Lima, Francisco Souza
Presenter: Bruno Silva de Lima
doi://10.26678/ABCM.COBEM2019.COB2019-0665
Abstract
A well-controlled fuel mixture process inside engines leads to a system improvement as a whole, thus, it is necessary to understand the interaction between air and fuel. To characterize an injection, the first step is testing it in a quiescent air chamber. Due to the complexity of this process, the prediction of injection behavior inside the chamber is carried out using computational tools. In the literature there are some models to predict the breaking of the liquid jet into droplets as well as its atomization. In the present work the KH-RT as well as TAB break models are tested for an outwardly opening nozzle type injector to describe the Lagrangian phase at an injection pressure of 100 bar using the commercial CONVERGE software. To simulate the Eulerian phase, which is the air inside the chamber, the RNG-ke model is used to describe turbulence. To validate the simulation, the jet of ethanol in a quiescent air chamber at atmospheric pressure is compared to data found in the literature for the jet penetration. The results showed that the correlations are able to predict the results with good precision, although showing that the models tested overestimate the results experimentally obtained for fuel penetration.
Keywords
Spray, Secondary breakup, CONVERGE, KH-RT, TAB
