Durst B., Hasse C., Toninel S., Frank T., Forkel H. Powertrain - CAE Combustion, BMW Group, Munich, ANSYS Germany, 2009 ? 13 р.Synopsis
In order to investigate Gasoline Direct Injection engines (GDI) by means of 3D-CFD simulations an efficient and innovative workflow for automated mesh generation is used which is based on the Pistongrid infrastructure provided by ANSYS CFX. This workflow was developed by BMW and has been established in the powertrain design process. For the simulation of combustion in Spark Ignition engines (SI) the G-equation model for fully and partially premixed combustion was successfully implemented in the ANSYS CFX code and coupled with the framework for simulating spark-ignition and predicting species in the reacted mixture by means of flamelet libraries.
The level-set based combustion model is presented and discussed in detail. Based on experimental results, 3D simulations for a turbo-charged gasoline direct injection engine are carried out, taking into account residual gas, spray, spray-wall interaction and combustion.
The results are compared to experimental data.
