On the Flame-generated Vorticity Dynamics of Bluff-body-stabilized Premixed Flames

被引:23
作者
Geikie, Marissa K. [1 ]
Carr, Zakery R. [2 ,3 ]
Ahmed, Kareem A. [1 ]
Forliti, David J. [3 ,4 ]
机构
[1] Univ Cent Florida, Dept Mech & Aerosp Engn, Prop & Energy Res Lab, Orlando, FL 32816 USA
[2] CUBRC LENS, Buffalo, NY 14225 USA
[3] Univ Buffalo, Buffalo, NY 14225 USA
[4] Univ St Thomas, Sch Engn, St Paul, MN 55105 USA
关键词
Turbulent premixed combustion; Flame-turbulence interactions; Bluff-body flames; Flame-generated vorticity; Flame structural dynamics; Baroclinic torque; LEAN BLOWOFF; PIV; EXTINCTION; LAMINAR; FLOWS; SPEED; ZONE;
D O I
10.1007/s10494-017-9822-1
中图分类号
O414.1 [热力学];
学科分类号
摘要
This investigation considers the dynamics of flame-generated vorticity for a premixed, submerged bluff-body stabilized flame. Experimentation characterizes the far-field region in particular with a level of detail not previously afforded to this type of flow. Simultaneous particle imaging velocimetry (PIV), Mie scattering and CH (au) chemiluminescence are used to obtain velocity fields and flame location. Mean static pressure measurements at the combustion chamber wall capture the pressure field. Analysis of the flame fronts in relation to the mean velocity and vorticity fields provides useful insight into the interaction of the flame and the flow. The unique nature of the velocity and vorticity fields and their effect on downstream flame structures are explained by the baroclinic torque generation of vorticity. The coupling that exists among pressure, heat release, and baroclinic generation is acknowledged and will influence strategies for control of the baroclinic mechanism.
引用
收藏
页码:487 / 509
页数:23
相关论文
共 43 条
[1]  
[Anonymous], 28 JOINT PROP C EXH
[2]  
[Anonymous], 2003, 41 AER SCI M EXH
[3]   FLAME GENERATION OF VORTICITY - VORTEX DIPOLES FROM MONOPOLES [J].
ASHURST, WT ;
MCMURTRY, PA .
COMBUSTION SCIENCE AND TECHNOLOGY, 1989, 66 (1-3) :17-37
[4]  
Bovina T A., 1958, Proc. Comb. Inst, V7, P692
[5]  
Carr Z., 2010, 48 AIAA AER SCI M IN, P6
[6]   Spatially correlated precision error in digital particle image velocimetry measurements of turbulent flows [J].
Carr, Z. R. ;
Ahmed, K. A. ;
Forliti, D. J. .
EXPERIMENTS IN FLUIDS, 2009, 47 (01) :95-106
[7]   Local Karlovitz numbers at extinction for various fuels in counterflow premixed flames [J].
Cho, E. -S. ;
Chung, S. H. ;
Oh, T. K. .
COMBUSTION SCIENCE AND TECHNOLOGY, 2006, 178 (09) :1559-1584
[8]   Validation of nitrogen kinetics in high pressure flames [J].
Egolfopoulos, FN .
ENERGY CONVERSION AND MANAGEMENT, 2001, 42 (01) :21-34
[9]   DAMKOHLER NUMBER SIMILARITY FOR STATIC FLAME STABILITY IN GASEOUS-FUELED AUGMENTOR FLOWS [J].
El-Asrag, Hossam A. ;
Pitsch, Heinz ;
Kim, Wookyung ;
Do, Hyungrok ;
Mungal, M. Godfrey .
COMBUSTION SCIENCE AND TECHNOLOGY, 2011, 183 (07) :718-737
[10]   Density ratio effects on reacting bluff-body flow field characteristics [J].
Emerson, Benjamin ;
O'Connor, Jacqueline ;
Juniper, Matthew ;
Lieuwen, Tim .
JOURNAL OF FLUID MECHANICS, 2012, 706 :219-250