An approach for extrapolating turbocharger compression ratio maps for engine simulations

Autores UPV
Año
CONGRESO An approach for extrapolating turbocharger compression ratio maps for engine simulations

Abstract

As pollutant regulations of internal combustion engines are becoming more restrictive year by year, manufacturers are forced to design, certify and construct new engines as fast as possible. This rush combined with the high amount of independent variables and parameters available in the engine and iits subsystems lead the characterization process to be simulated using 0D-1D codes, since the modern computational units are powerful enough to handle large number of simulations at the same time without risk of damaging actual engines. Thus, the improvement of the accuracy and convergence of the codes is critical. When a turbocharged ICE needs to be simulated, the most used compressor submodel in the 0D-1D codes relies on a compressor map where the operating condition is interpolated. This work is addressed to extend a common compressor map range to assure the accuracy and convergence of the simulation. Compressors behave quite differently in each of their regions, implying a difficulty for a single extrapolation method to predict all of them. So that, for the extrapolation approach proposed in this work, each zone is going to be treated separately, taking advantage of the benefits of the most suitable model for each region.