A simulation study of the behavior of a two

Equipe Energétique des Moteurs à Combustion Interne
Laboratoire de Mécanique des Fluides – UMR CNRS 6598
A simulation study of the behavior of a two-stage turbocharging system
during surge
Pascal Chessé, Xavier Tauzia, Jean-François Hétet, Bahadir Inozu, Philippe Roy
1996 Fall Technical Conference of the ASME Internal Combustion Engine Division
Fairborn, Ohio, October 20-23, 1996
Turbocharger matching for a high rated two-stage turbocharged Diesel engine is rather
difficult due to the power balance between the two turbocharger stages. Compressor surge is a
predominant factor, especially for naval applications for which operation ranges are quite
wide. In this paper, a simulation study of a two-stage turbocharged system that includes a low
pressure and a high pressure compressor is presented. Equations that are specific to such a
system are added to a basic model and the resulting set of equations is solved using ACSL.
The influence of the geometry of the charging air system on the compressor surge is analyzed
according to the primary engine parameters (cylinder pressure, engine speed and distribution
diagram).
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