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Applying an extended flamelet model for a multiple injection operating strategy in a common-rail di diesel engine

Gauding, M. and Felsch, C. and Kerschgens, B. and Vanegas, A. and Won, H. and Peters, N. and Hasse, C. (2009):
Applying an extended flamelet model for a multiple injection operating strategy in a common-rail di diesel engine.
In: SAE International Journal of Engines, pp. 727-741, 2, (1), DOI: 10.4271/2009-01-0720,
[Online-Edition: http://dx.doi.org/10.4271/2009-01-0720],
[Article]

Abstract

Subject of this work is the recently introduced extended Representative Interactive Flamelet (RIF) model for multiple injections. First, the two-dimensional laminar flamelet equations, which can describe the transfer of heat and mass between two-interacting mixture fields, are presented. This is followed by a description of the various mixture fraction and mixture fraction variance equations that are required for the RIF model extension accounting for multiple injection events. Finally, the modeling strategy for multiple injection events is described: Different phases of combustion and interaction between the mixture fields resulting from different injections are identified. Based on this, the extension of the RIF model to describe any number of injections is explained. Simulation results using the extended RIF model are compared against experimental data for a Common-Rail DI Diesel engine that was operated with three injection pulses. Simulated pressure curves, heat release rates, and pollutant emissions are found to be in good agreement with corresponding experimental data. For the pilot injection and the main or post injection, respectively, different ignition phenomena are pointed out and the influence of the scalar dissipation rate on these ignition phenomena is detailly investigated. 2009 SAE International.

Item Type: Article
Erschienen: 2009
Creators: Gauding, M. and Felsch, C. and Kerschgens, B. and Vanegas, A. and Won, H. and Peters, N. and Hasse, C.
Title: Applying an extended flamelet model for a multiple injection operating strategy in a common-rail di diesel engine
Language: German
Abstract:

Subject of this work is the recently introduced extended Representative Interactive Flamelet (RIF) model for multiple injections. First, the two-dimensional laminar flamelet equations, which can describe the transfer of heat and mass between two-interacting mixture fields, are presented. This is followed by a description of the various mixture fraction and mixture fraction variance equations that are required for the RIF model extension accounting for multiple injection events. Finally, the modeling strategy for multiple injection events is described: Different phases of combustion and interaction between the mixture fields resulting from different injections are identified. Based on this, the extension of the RIF model to describe any number of injections is explained. Simulation results using the extended RIF model are compared against experimental data for a Common-Rail DI Diesel engine that was operated with three injection pulses. Simulated pressure curves, heat release rates, and pollutant emissions are found to be in good agreement with corresponding experimental data. For the pilot injection and the main or post injection, respectively, different ignition phenomena are pointed out and the influence of the scalar dissipation rate on these ignition phenomena is detailly investigated. 2009 SAE International.

Journal or Publication Title: SAE International Journal of Engines
Volume: 2
Number: 1
Uncontrolled Keywords: Common rail; DI diesel engine; Experimental data; Flamelet models; Flamelets; Heat release rates; Injection pulse; Laminar flamelets; Mixture fraction; Model extensions; Modeling strategy; Multiple injections; Operating strategy; Pilot injection; Pollutant emission; Post injection; Pressure curve; Scalar dissipation rate; Simulation result; Variance equations, Computer simulation; Flammability; Mixtures, Diesel engines
Divisions: 16 Department of Mechanical Engineering > Simulation of reactive Thermo-Fluid Systems (STFS)
16 Department of Mechanical Engineering
Date Deposited: 23 Nov 2017 15:11
DOI: 10.4271/2009-01-0720
Official URL: http://dx.doi.org/10.4271/2009-01-0720
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