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仪器网/ 行业应用/ 解决方案/ 相对喷嘴结构氢气和甲烷边界和扩散火焰:结构和稳定性

相对喷嘴结构氢气和甲烷边界和扩散火焰:结构和稳定性

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Hydrogen/air and methane/air flames in axi-symmetric opposed jet burners were investigated
experimentally for different flow velocities, burner geometries and fuel dilutions.
Above critical strain rate values there is the local extinction of the planar diffusion flame,
and the edge flame forms, which propagates and stabilizes further away from the axis
of symmetry, assuming a toroidal shape. The ranges of air and fuel flow velocities over
which the diffusion or the edge flame are stable were determined. There is a substantial
range over which both flames can be stabilized, and the transition between the two flame
types exhibits a strong hysteresis.
Raman spectroscopy was used for the determination of the spatial distribution of
temperature and major species concentrations, while the OH radical distribution was
obtained with Planar Laser Induced Fluorescence (LIF). Particle Image Velocimetry (PIV)
was employed to characterize the flow fields both in cold and reactive conditions. PLIF平面激光诱导荧光火焰燃烧检测系统
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