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Laminar flamelet model
The Laminar Flamelet Model is one of the methods of modelling turbulent combustions apart from SCRS, Eddy flamelet model and others. Combustion is a very important thermochemical process with significant material and aerodynamic implications and thus CFD modeling of combustion has become indispensable. The laminar flamelet model is basically for non pre-mixed fuel (the system in which the fuel and oxygen is supplied from two different pipes). Laminar flamelet model is different from much more popular SCRS model as it includes the experimental information also which helps in bringing out much more intricate relationship between variables like temperature, mixture fractions and mass fractions.
== Theory ==
The flamelet concept considers the turbulent flame as an aggregate of thin, laminar(Re<2000), locally one-dimensional flamelet structures present within the turbulent flow field. Counterflow diffusion flame is a common laminar flame which is used to represent a flamelet in a turbulent flow. Its geometry consists of opposed and axi-symmetric fuel and oxidizer jets. As the distance between the jets is decreased and/or the velocity of the jets is increased, the flame is strained and departs from its chemical equilibrium until it eventually extinguishes. The mass fraction of species and temperature fields can be measured or calculated in laminar counterflow diffusion flame experiments. When calculated, a self-similar solution exists, and the governing equations can be simplified to only one dimension i.e. along the axis of the fuel and oxidizer jets. It is in this direction where complex chemistry calculations can be performed afford-ably.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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