Extended Proper Orthogonal Decomposition for Analysis of Unsteady Flames

被引：55

作者：

Duwig, Christophe ^{[1
,2
]}

Iudiciani, Piero ^{[1
]}

机构：

[1] Lund Univ, Dept Energy Sci, Div Fluid Mech, S-22100 Lund, Sweden

[2] Haldor Topsoe Res Labs, DK-2800 Lyngby, Denmark

来源：

FLOW TURBULENCE AND COMBUSTION | 2010年 / 84卷 / 01期

基金：

瑞典研究理事会;

关键词：

Proper orthogonal decomposition; Linear stochastic estimation; Conditional averaging; Laminar flame dynamics; LARGE-EDDY SIMULATION; LASER-INDUCED FLUORESCENCE; STOCHASTIC ESTIMATION; PREMIXED FLAMES; TURBULENT JET; COMBUSTION; VELOCITY; FLOW;

D O I：

10.1007/s10494-009-9210-6

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The aim of this work is to present the use of proper orthogonal decomposition (POD) and extended proper orthogonal decomposition (EPOD) for revealing flame dynamics as a set of statistical quantities referred as modes. The flame fluctuations are used to derive an empirical functions base representing the most important features of the flame. The capabilities of the technique are exemplified in the case of an unsteady laminar flame. The flame is naturally unsteady and can be excited to amplify the fluctuations. The data base consists of synchronous Particle Image Velocimetry (PIV) and OH-Planar Laser Induced Fluorescence (OH-PLIF) measurements. It was found that the POD based upon the PIV vectors only reveals flow features when the excitation is added. On contrary, the OH-PLIF based POD performs well in any case and constitutes a suitable base for the EPOD analysis.

引用

页码：25 / 47

页数：23

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