Multiple mapping conditioning of velocity in turbulent jet flames

被引:5
|
作者
Vaishnavi, P. [1 ]
Kronenburg, A. [2 ]
机构
[1] Univ London Imperial Coll Sci Technol & Med, Dept Mech Engn, London SW7 2AZ, England
[2] Univ Stuttgart, Inst Tech Verbrennung, D-70174 Stuttgart, Germany
关键词
Turbulence; Jet flames; Mapping closure; Velocity modelling; MOMENT CLOSURE;
D O I
10.1016/j.combustflame.2010.06.007
中图分类号
O414.1 [热力学];
学科分类号
摘要
Multiple mapping conditioning (MMC) has emerged as a new approach to model turbulent reacting flows. This study revises the standard MMC closure for velocity in turbulent jet flows from linearity in the reference space to linearity in the composition space. This modeling amendment ensures that the standard velocity model in conditional moment closure studies can now be used for MMC computation as well. A simplified model for the velocity-dependence of MMC drift coefficients is derived without loss of generality and is implemented for the revised velocity closure. Modeling results have been corroborated against the Direct Numerical Simulation database of a spatially evolving, planar turbulent jet flame. The revised model shows marked improvement over standard MMC closure in predicting velocity statistics close to the nozzle. (C) 2010 The Combustion Institute. Published by Elsevier Inc. All rights reserved.
引用
收藏
页码:1863 / 1865
页数:3
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