Upstream islands of flame in lifted-jet partially premixed combustion

被引：13

作者：

Lyons, K. M. ^{[1
]}

Watson, K. A.

Carter, C. D.

Donbar, J. M.

机构：

[1] N Carolina State Univ, Dept Mech & Aerosp Engn, Raleigh, NC 27695 USA

[2] Univ Pacific, Dept Mech Engn, Stockton, CA 95211 USA

[3] USAF, Res Lab, AFRL PRA, Wright Patterson AFB, OH 45433 USA

来源：

COMBUSTION SCIENCE AND TECHNOLOGY | 2007年 / 179卷 / 05期

基金：

美国国家科学基金会;

关键词：

edge flames; flame stabilization; ignition; jet flames;

D O I：

10.1080/00102200600910858

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Contemporary interest exists in understanding the roles of leading edge flow deflection, secondary jet instabilities and islands of ignited gases in permitting lifted flames to stabilize. To assess these issues, elements of the leading-edge of a lifted turbulent jet flame have been investigated using laser-imaging techniques. Images of flame position, morphology and dynamics are presented primarily from CH planar laser-induced fluorescence (CH-PLIF) measurements. In particular, evidence of flame islands, or flame fragments, upstream of the bulk-flame leading edge are reported and discussed. This evidence is presented in the form of sequential CH-PLIF images and well as CH-PLIF/Rayleigh scattering images. Images showing thermal characteristics of the regions surrounding the edge flame are also described.

引用

页码：1029 / 1037

页数：9

共 16 条

[1] Effects of heat release in laminar diffusion flames lifted on round jets [J].

Boulanger, J ;

Vervisch, L ;

Reveillon, J ;

Ghosal, S .

COMBUSTION AND FLAME, 2003, 134 (04) :355-368

[2] The role of secondary instabilities in the stabilization of a nonpremixed lifted jet flame [J].

Demare, D ;

Baillot, F .

PHYSICS OF FLUIDS, 2001, 13 (09) :2662-2670

[3] Reaction-rate, mixture-fraction, and temperature imaging in turbulent methane/air jet flames [J].

Frank, JH ;

Kaiser, SA ;

Long, MB .

PROCEEDINGS OF THE COMBUSTION INSTITUTE, 2002, 29 (02) :2687-2694

[4] On flame holes and local extinction in lifted-jet diffusion flames [J].

Lyons, KM ;

Watson, KA ;

Carter, CD ;

Donbar, JM .

COMBUSTION AND FLAME, 2005, 142 (03) :308-313

[5] Instantaneous flame-stabilization velocities in lifted-jet diffusion flames [J].

Muniz, L ;

Mungal, MG .

COMBUSTION AND FLAME, 1997, 111 (1-2) :16-31

[6]

Peters N., 2001, TURBULENT COMBUSTION

[7]

Pitts W.M., 1988, Proc. Combust. Instit, V22, P809

[8] Characteristics of lifted triple flames stabilized in the near field of a partially premixed axisymmetric jet [J].

Qin, X ;

Puri, IK ;

Aggarwal, SK .

PROCEEDINGS OF THE COMBUSTION INSTITUTE, 2002, 29 :1565-1572

[9] Experimental investigation of stabilization mechanisms in turbulent, lifted jet diffusion flames [J].

Su, LK ;

Sun, OS ;

Mungal, MG .

COMBUSTION AND FLAME, 2006, 144 (03) :494-512

[10] Liftoff of turbulent jet flames - assessment of edge flame and other concepts using cinema-PIV [J].

Upatnieks, A ;

Driscoll, JF ;

Rasmussen, CC ;

Ceccio, SL .

COMBUSTION AND FLAME, 2004, 138 (03) :259-272

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