Intake and Exhaust Processes in Combustion Engines, Development of Siflex
The gas flow through the intake and exhaust ports of piston combustion engines has a strong influence on engine efficiency, maximum power output and exhaust gas emissions. A computer model which can predict the flow through the intake and exhaust ports will be a strong design tool and will provide a better understanding of the flow phenomena.
Therefore, SIFLEX (Simulation of FLow through EXhaust ports) is being set up at IW-TNO (Delft, The Netherlands) in cooperation with the Delft University of Technology. SIFLEX will be a ‘user-friendly’ satellite of PHOENICS BFC, and validated by measurements. SIFLEX will be available to industry.
set-up of a correct physical model
correct solution of this model
Before checking the physical model with measurement, however, this model has to be solved reliably. In this field, grid generation is the main problem. Tests have been carried out with both cartesian and polar coordinate systems. The results thereof will be discussed. To check the physical model (problem I), tests have been carried out on a stationary flow rig of the cylinder head.
KeywordsMaximum Power Output Cylinder Head Cartesian Grid Intake Port Engine Efficiency
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