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An experimental and numerical investigation of turbulent flame propagation and flame structure in a turbo-charged direct injection gasoline engine

Linse, D. and Hasse, C. and Durst, B. (2009):
An experimental and numerical investigation of turbulent flame propagation and flame structure in a turbo-charged direct injection gasoline engine.
In: Combustion Theory and Modelling, pp. 167-188, 13, (1), DOI: 10.1080/13647830802524829,
[Online-Edition: https://doi.org/10.1080/13647830802524829],
[Article]

Abstract

Turbulent flame propagation in a modern, turbo-charged, direct-injection gasoline engine is investigated in detail for the whole engine operating map. Different development tools are used in a combined fashion. Based on experimental results with high and low-pressure indication, a global heat release analysis coupled with a 1D gas dynamics simulation is performed. Using the data from the 1D gas dynamics simulation as initial and boundary conditions, 3D CFD calculations are carried out. From these calculations the characteristic velocity and length scales of the turbulent flow as well as the relevant scales of premixed flame propagation, flame speed and flame thickness, respectively, are analysed for all relevant operating conditions of the engine. This leads to a classification of combustion regimes and flame structures based on the Peters-Borghi diagram. The effects of engine speed and load variations are discussed in detail based on scale analysis, especially the effect on the turbulence-premixed flame interaction. Based on these results and an analysis of the global heat release profiles, a simplified model for the burn duration is derived taking into account the turbulent flow scales obtained from a 3D CFD analysis and the thermochemical properties such as gas composition including exhaust gases, pressure and temperature. The results are compared to experimental data.

Item Type: Article
Erschienen: 2009
Creators: Linse, D. and Hasse, C. and Durst, B.
Title: An experimental and numerical investigation of turbulent flame propagation and flame structure in a turbo-charged direct injection gasoline engine
Language: English
Abstract:

Turbulent flame propagation in a modern, turbo-charged, direct-injection gasoline engine is investigated in detail for the whole engine operating map. Different development tools are used in a combined fashion. Based on experimental results with high and low-pressure indication, a global heat release analysis coupled with a 1D gas dynamics simulation is performed. Using the data from the 1D gas dynamics simulation as initial and boundary conditions, 3D CFD calculations are carried out. From these calculations the characteristic velocity and length scales of the turbulent flow as well as the relevant scales of premixed flame propagation, flame speed and flame thickness, respectively, are analysed for all relevant operating conditions of the engine. This leads to a classification of combustion regimes and flame structures based on the Peters-Borghi diagram. The effects of engine speed and load variations are discussed in detail based on scale analysis, especially the effect on the turbulence-premixed flame interaction. Based on these results and an analysis of the global heat release profiles, a simplified model for the burn duration is derived taking into account the turbulent flow scales obtained from a 3D CFD analysis and the thermochemical properties such as gas composition including exhaust gases, pressure and temperature. The results are compared to experimental data.

Journal or Publication Title: Combustion Theory and Modelling
Volume: 13
Number: 1
Uncontrolled Keywords: Diesel engines, Dynamics; Engines, Exhaust gases, Flammability, Gas dynamics, Gas fuel analysis, Gases, Gasoline, Leakage (fluid), Smoke, Thermochemistry, Three dimensional, Turbulence, Turbulent flow, Burning velocity, Combustion regime, Flame structure, Gasoline engine,Turbulent combustion, Combustion
Divisions: 16 Department of Mechanical Engineering > Simulation of reactive Thermo-Fluid Systems (STFS)
16 Department of Mechanical Engineering
Date Deposited: 29 Nov 2017 14:50
DOI: 10.1080/13647830802524829
Official URL: https://doi.org/10.1080/13647830802524829
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