Browse Publications Technical Papers 2001-28-0004

An Integrated 1D / 3D Workflow for Analysis and Optimization of Injection Parameters of a Diesel Engine 2001-28-0004

The present contribution gives an overview of the use of different simulation tools for the optimisation of injection parameters of a Diesel engine.
With a one-dimensional tool, the behaviour of the mechanics and fluid dynamics of the entire injection system is calculated. This simulation provides information on the dynamic needle lift, injection rates, pressures etc.
The flow within the injector is simulated using a three-dimensional CFD tool. By use of a two-phase model it is possible to analyse the cavitating flow inside the injector and to calculate the effective nozzle hole area as well as the exit flow characteristics.
Mixture formation, combustion and pollutant formation simulation is performed adopting three-dimensional CFD. In order to provide the initial and boundary conditions for the engine CFD simulation and to optimize the engine cycle performance a one dimensional tool is adopted.
The way how these simulation tools can be applied together will be demonstrated on relevant application examples from the engine development showing how the two main challenges - fuel consumption and pollutant emissions - can be met.


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