Abstract：To examine the effect of the flow field within the recirculation zone on flame structure, the characteristic velocity fields of methane/humid air flame in non-premixed combustion behind a disc bluff-body burner were experimentally studied by particle image velocimeter (PIV).The results show that two stagnation points exist on the centerline in the recirculation zone flame. However, the distance of the two stagnation points in humid air combustion shortens, and the minimal dimensionless velocity increases compared with the conventional non-humid air combustion. In addition, the positional curves of the minimal velocities can be partitioned into three phases representing three different flame patterns. The analysis of axial minimal velocities on the centerline and their positions under different co-flow air velocity conditions reveals that fuel-to-air velocity ratio is the crucial parameter that governs humid air combustion flame characteristics.
出版日期: 2008-06-05
引用本文:
. Experimental study on velocity characteristics
of recirculation zone in humid air non-premixed flame[J]. Frontiers of Energy and Power Engineering in China - Selected Publications from Chinese Universities, 2008, 2(2): 140-144.
GU Xin, ZANG Shusheng, GE Bing. Experimental study on velocity characteristics
of recirculation zone in humid air non-premixed flame. Front. Energy, 2008, 2(2): 140-144.
Chen Y C Chang C C Pan K L et al.Flame lift-off and stabilization mechanisms of nonpremixedjet flames on a bluff-body burner 1998 Combust Flame1155165. doi:10.1016/S0010‐2180(97)00336‐2
2
Esquiva-Dano I Nguyen H T Escudie D Influence of a buff-body's shape on the stabilization regionof non-premixed flamesCombust Flame 2001 12721672180. doi:10.1016/S0010‐2180(01)00318‐2
3
Masri A R Bilger R W Turbulent diffusion flame ofhydrocarbon fuels stabilized on a bluff body. Twentieth Symposium(International) on Combustion, Pittsburgh, Pa.: The Combustion Institute 1985 319326
4
Roquemore W M Tankin R S Chiu H H et al.A study of a bluff-body combustion using laser sheetlightingExp In Fluids 1986 4205213. doi:10.1007/BF00717816
5
Huang R F Lin C L Characteristic modes and thermalstructure of nonpremixed circular-disc stabilized flameCombust Sci Tech 1994 100123139
6
Huang R F Yang J T Lee G L Flame and flow characteristics of double concentric jetsCombust Flame 1997 108923. doi:10.1016/S0010‐2180(95)00194‐8
7
Zhou Jianguang Zang ShuSheng Weng Shilie et al.PIV application in the measurement of diffusioncombustion flow fieldJournal of CombustSci Tech 2005 11(1)9295
8
Ge Bing Zang Shusheng Zhou Jianguang et al.Experimental study of reverse flow combustion ina turbulent flow field using PIVJournalof Aerospace Power 2004 19(6)849853
