Turbulent combustion (Lecture 3) Non-premixed flames
Turbulent combustion (Lecture 3) Non-premixed flames
Turbulent combustion (Lecture 3) Non-premixed flames
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Edge <strong>flames</strong> - non<strong>premixed</strong> - with heat loss!<br />
Daou et al., 2002!<br />
κ = dimensionless heat loss ≈ 7.5β/Pe 2 ; Pe ≡ S L d/α (see Cha & Ronney, 2006)!<br />
With heat loss: trailing non-<strong>premixed</strong> branch disappears at low ε -<br />
non<strong>premixed</strong> flame extinguishes because mixing layer thickness ~ (α/Σ) 1/2<br />
(thus volume, thus heat loss) increases while burning rate decreases!<br />
AME 514 - Spring 2013 - <strong>Lecture</strong> 9<br />
17<br />
Edge <strong>flames</strong> - <strong>premixed</strong> - theory!<br />
Daou and Linan, 1999 - similar response of U edge to stretch as<br />
non<strong>premixed</strong> <strong>flames</strong> - also note "spots"!<br />
AME 514 - Spring 2013 - <strong>Lecture</strong> 9<br />
18<br />
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