TITLE : TRANSIENT SIMULATION OF IN-CYLINDER AERODYNAMICS AND TURBULENT FUEL MIXING USING A BODY-FITTED MOVING GRID

BY : CHAM Consultancy Team - F G Mendonca
FOR : E.C. BRITE Project, FACSIMILE
DATE : End 1992
PHOENICS Version : 1.6.6

MODELLING DETAILS :

• Three-Dimensional, Turbulent, Transient flow
• Body-Fitted Moving Grid

NOTES :

• Collaborative project has resulted in the production of an efficient, geometrically representative and experimentally validated Computational Design Tool for modelling in-cylinder flow during the non-combustion part of the engine cycle.
• The use of PHOENICS built-in physical models mean that sufficiently detailed transient modelling is achieved within a realistic framework of computational turnaround time.

The pictures (courtesy of GEC ALSTHOM Ruston Diesels Ltd.) are as follows:

1. Three-Dimensional grid depicting the curved piston, cylinder head with inlet and exhaust valve holes, and pre-combustion chamber.
2. Velocity vectors along the cylinder head, symmetry plane and piston pressure distribution.
3. Contours of fuel mass fraction during induction

Further Information :

• N M Proumen, M R Malin, F G Mendonca 'Evaluation of Turbulence Models for In-Cylinder Flows' PHOENICS Journal - 1991 : Vol.4 Supp.I
• F G Mendonca, P Shah, D R Glynn (1992) 'Modelling of In-Cylinder Aerodynamics Using a Body-Fitted Grid' PHOENICS Journal - 1992 : Vol.5 no.3
• F G Mendonca, A Bretton 'Simulation of In-Cylinder Fuel Mixing in a Large Spark Ignition Lean Burn Engine', IMechE C465/010/93, Proceedings : 17-18 Nov 1993

Three-Dimensional Grid Configuration
Velocity vectors
Contours of fuel mass fraction during induction

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