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http://dx.doi.org/10.5139/JKSAS.2008.36.4.352

Characteristics of Stabilization Point in Lifted Turbulent Hydrogen Diffusion Jet with Coaxial Air  

Oh, Jeong-Seog (서울대학교 기계항공공학부원)
Kim, Mun-Ki (서울대학교 기계항공공학부원)
Yoon, Young-Bin (서울대학교 기계항공공학부)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.36, no.4, 2008 , pp. 352-356 More about this Journal
Abstract
In this study of lifted hydrogen jet with coaxial air, we have experimentally studied the characteristics of stabilization point in turbulent diffusion flames. The objectives are to present the phenomenon of a liftoff height decreasing as increasing fuel velocity and to analyse the flame structure and behavior including liftoff mechanisms. The fuel jet exit velocity was changed from 100 up to 300 m/s and a coaxial air velocity was fixed at 16 m/s with a coflow air less than 0.1 m/s. For the simultaneous measurement of velocity field and reaction zone, PIV and OH PLIF technique was used with two Nd:Yag lasers and CCD cameras. It has been suggested that the stabilization of lifted hydrogen diffusion flames was correlated with a turbulent intensity, $S_t{\sim}u^{\prime}$, and jet Reynolds number, $S_t{\sim}Re^{0.017}_{jet}$.
Keywords
Hydrogen jet; Lifted flame; Simultaneous measurement;
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