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Lackmann, T. (2015) *A Representative Interactive Linear Eddy Model*. Göteborg : Chalmers University of Technology

** BibTeX **

@book{

Lackmann2015,

author={Lackmann, Tim},

title={A Representative Interactive Linear Eddy Model},

abstract={To further improve the efficiency and emissions profiles of
internal combustion engines, many new combustion concepts
are currently being investigated. Examples include
homogeneous charge compression ignition (HCCI), stratified
charge compression ignition (SCCI), lean stratified premixed
combustion, and the use of high levels of exhaust gas
recirculation (EGR) in diesel engines. The typical combustion
temperatures in all of these concepts are lower than those in
traditional spark ignition or diesel engines.
Most of the combustion models that are currently used in
computational fluid dynamics (CFD) simulations were
developed to describe either premixed or non-premixed
combustion under the assumption of fast chemistry. The
refinement of existing combustion concepts for highly efficient
clean engines and the development of new ones would be
greatly facilitated by the introduction of new computational
tools and combustion models that are mode- and regime-
independent, i.e. capable of modeling both premixed and non-
premixed and also fast and non-fast chemistry. Such tools
should enable more accurate simulation of combustion under
non-standard conditions such as those established during low
temperature combustion.
This thesis presents a new regime-independent combustion
modeling strategy for non-premixed combustion in which the
linear eddy model (LEM) is used as a representative interactive
regime-independent turbulent combustion model and coupled
to a 3D CFD solver. Parameters and boundary conditions that
determine the evolution of the LEM are supplied by the 3D
CFD calculation and updated at each time step. The LEM is
then solved for the corresponding time step, providing the 3D
CFD code with an updated composition state.
},

publisher={Institutionen för tillämpad mekanik, Förbränning, Chalmers tekniska högskola,},

place={Göteborg},

year={2015},

note={65},

}

** RefWorks **

RT Dissertation/Thesis

SR Print

ID 215968

A1 Lackmann, Tim

T1 A Representative Interactive Linear Eddy Model

YR 2015

AB To further improve the efficiency and emissions profiles of
internal combustion engines, many new combustion concepts
are currently being investigated. Examples include
homogeneous charge compression ignition (HCCI), stratified
charge compression ignition (SCCI), lean stratified premixed
combustion, and the use of high levels of exhaust gas
recirculation (EGR) in diesel engines. The typical combustion
temperatures in all of these concepts are lower than those in
traditional spark ignition or diesel engines.
Most of the combustion models that are currently used in
computational fluid dynamics (CFD) simulations were
developed to describe either premixed or non-premixed
combustion under the assumption of fast chemistry. The
refinement of existing combustion concepts for highly efficient
clean engines and the development of new ones would be
greatly facilitated by the introduction of new computational
tools and combustion models that are mode- and regime-
independent, i.e. capable of modeling both premixed and non-
premixed and also fast and non-fast chemistry. Such tools
should enable more accurate simulation of combustion under
non-standard conditions such as those established during low
temperature combustion.
This thesis presents a new regime-independent combustion
modeling strategy for non-premixed combustion in which the
linear eddy model (LEM) is used as a representative interactive
regime-independent turbulent combustion model and coupled
to a 3D CFD solver. Parameters and boundary conditions that
determine the evolution of the LEM are supplied by the 3D
CFD calculation and updated at each time step. The LEM is
then solved for the corresponding time step, providing the 3D
CFD code with an updated composition state.

PB Institutionen för tillämpad mekanik, Förbränning, Chalmers tekniska högskola,

LA eng

OL 30