난류 예혼합 화염의 미연가스 영역 난류 특성Unburned Gas Turbulence Properties in Turbulent Premixed Flame

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Measured turbulence properties of methane/air premixed flame was presented. Two-color laser velocimeter was used to obtain simultaneous statistics of vertical velocity components of open jet burner within unburned gas region. Same set of measurements was repeated at 21 locations to investigate the spatial variation of the turbulence properties. Test condition was at Reynolds number of 7,000 and fuel equivalence ratio 0.6 and 1.0. Time records of instantaneous velocities were reduced to obtain mean velocities, Reynolds stress, probability densities, and joint probabilities. The Cane affected all the turbulence properties in the unburned gas region. The finding strongly suggests that volume expansion at the Came surface is responsible for the changes in turbulence properties. Present finding also implies that the existing models assuming invariant turbulence properties can be improved by accounting for this effect.
Publisher
한국항공우주학회
Issue Date
1999-08
Language
Korean
Citation

한국항공우주학회지, v.27, no.5, pp.17 - 23

ISSN
1225-1348
URI
http://hdl.handle.net/10203/75868
Appears in Collection
AE-Journal Papers(저널논문)
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