LES/PDF based modeling of soot-turbulence interactions in turbulent flames

被引：55

作者：

Donde, Pratik ^{[1
]}

Raman, Venkat ^{[1
]}

Mueller, Michael E. ^{[2
]}

Pitsch, Heinz ^{[3
]}

机构：

[1] Univ Texas Austin, Dept Aerosp Engn & Engn Mech, Austin, TX 78712 USA

[2] Stanford Univ, Dept Mech Engn, Stanford, CA 94305 USA

[3] Rhein Westfal TH Aachen, Inst Combust Technol, Aachen, Germany

来源：

PROCEEDINGS OF THE COMBUSTION INSTITUTE | 2013年 / 34卷

关键词：

Probability density function; Large eddy simulation; Soot; Non-premixed turbulent flames; Soot-turbulence-chemistry interactions; LARGE-EDDY SIMULATION; FILTERED-DENSITY-FUNCTION; DIFFUSION;

D O I：

10.1016/j.proci.2012.07.055

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

A large eddy simulation (LES)/probability density function (PDF) approach is used to describe the small-scale soot-turbulence-chemistry interactions. The PDF approach directly evolves the joint statistics of the gas-phase scalars and a set of moments of the soot number density function. This LES/PDF approach is then used to simulate a turbulent natural gas jet diffusion flame. Since the PDF equation is high dimensional, a Lagrangian method formulated in cylindrical coordinates is coupled to the Eulerian solution technique for the LES flow equations. The LES/PDF simulations show that soot formation is highly intermittent and is always restricted to the fuel-rich region of the flow. The PDF of soot moments has a wide spread leading to a large subfilter variance. Further, the conditional statistics of soot moments conditioned on mixture fraction and reaction progress variable show strong correlation between the gas phase composition and soot moments. (C) 2012 The Combustion Institute. Published by Elsevier Inc. All rights reserved.

引用

页码：1183 / 1192

页数：10

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