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http://dx.doi.org/10.5762/KAIS.2010.11.10.3647

An Experimental Study on the Flame Appearance and Heat Transfer Characteristics of Acoustically Excited Impinging Inverse Diffusion Flames  

Kang, Ki-Joong (School of Mechanical and Aerospace Engineering, Sunchon National Univ.)
Lee, Kee-Man (School of Mechanical and Aerospace Engineering, Sunchon National Univ.)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.11, no.10, 2010 , pp. 3647-3653 More about this Journal
Abstract
An experimental investigation of the flame appearance and heat transfer characteristics in both unexcited and excited impinging inverse diffusion flames with a loud speaker has been performed. The flame is found to become broader and shorter (in length) with acoustic excitation. The heat flux at the stagnation point is increased with the acoustic excitation. The acoustic excitation is more effective in lean conditions than in rich conditions. The reasons for these behaviors are that acoustic excitation improves the entrainment of surrounding air into the jet. From this study, it is found that the maximum increase of 57% in the total heat flux is obtained at the stagnation point of $\Phi$=0.8. Therefore, it is ascertained that the excitation combustion can be adopted with effective instruments as a method for improving heat transfer in impinging jet flames.
Keywords
IDF(Inverse diffusion flame); Impinging jet flame; Excited jet flame; Resonant Frequency; Heat flux; Stagnation point;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
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