EFFECTING THE TURBULENCE IN FLAME PROPAGATION OF FOUR VALVE ENGINE
Author(s):
SHAIK ABDUL AZEEZ, RAFFI MOHAMMAD, Dr. ABDUL SIDDIQUE
Keywords:
Computational Fluid Dynamics (CFD), Automotive Flows, Turbulence Modeling, CFX.
Abstract
In this paper some initial results concerning the evolution of flame propagation in 4-valve engines with tilted valves were presented. Results were obtained by dint of multidimensional modeling of reactive flows in arbitrary geometry with moving boundaries. During induction fluid flow pattern was characterized with organized tumble motion followed by small but clearly legible deterioration in the vicinity of BDC. During compression the fluid flow pattern is entirely three- dimensional and fully controlled by vortex motion located in the central part of the chamber. The effect of turbulence model variation on flame propagation was tackled as well. Namely, some results obtained with eddy-viscosity model i.e. standard k-ε model were compared with results obtained with k-ξ-f model of turbulence in domain of 4-valve engine in-cylinder flow. Some interesting results emerged rendering impetus for further quest in the near future. In the case of combustion all differences ensuing from turbulence model variation, encountered in the case of non-reactive flow were annihilated entirely. Namely the interplay between fluid flow pattern and flame propagation is invariant as regards both turbulence models applied.
Article Details
Unique Paper ID: 143897

Publication Volume & Issue: Volume 3, Issue 3

Page(s): 160 - 166
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