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Intake manifold design effect on air fuel mixing and flow for an LPG heavy duty engine

Author(s): M. A. Jemni, G. Kantchev, M. S. Abid

Journal: International Journal of Energy and Environment
ISSN 2076-2895

Volume: 3;
Issue: 1;
Start page: 61;
Date: 2012;
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Keywords: Air-LPG mixture; Intake manifold; CFD; Experiment

The paper presents an investigation of mixture preparation in the intake manifold of a Diesel converted engine into LPG spark-ignition engine operation. The formation process of air-LPG (liquefied petroleum gas) mixture was studied using computation fluid dynamics (CFD) mode. Two manifold shapes are used in order to test the adequate design in view of flow and air-gas homogenization. The first is designed according the acoustic-wave-filling phenomena, and the second present an unspecified design. The model of simulation is based on solving Navier-Stokes and energy equations in conjunction with the standard k-ε turbulence model, using the 3D CFD code FloWorks. Experiment test are carried out also to test the intake manifold effect on engine performance. Air-fuel ratio and specific fuel consumption are determined. The results indicate the effectiveness of the first manifold.
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