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http://dx.doi.org/10.3795/KSME-B.2015.39.6.485

Characteristics of Chemiluminescence Intensities of Kerosene/Air Swirl Flames  

Lee, Hyeonjae (Department of Mechanical Engineering, Hanbat Nat'l Univ.)
Seo, Seonghyeon (Department of Mechanical Engineering, Hanbat Nat'l Univ.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.39, no.6, 2015 , pp. 485-496 More about this Journal
Abstract
The present study presents experimental results on the characteristics of emission spectra of kerosene/air swirl flames. The aviation fuel Jet A-1, which is used for the liquid rocket engines of the Korea Space Launch Vehicle, is used with three different swirlers to investigate the swirl strength effects. The emission spectra from the flames are measured with a spectrometer as the swirl strength and combustion air temperature are varied. Chemiluminescence intensities of $OH^*$, $CH^*$ and $C_2{^*}$ are identified from the spectra. The chemiluminescence intensities from the kerosene flames show sensitivity to the swirl strength and are affected by changes in the combustion air temperature. Among the three radicals of interest, $C_2{^*}$ show the most significant changes in chemiluminescence intensity with the swirl strength and equivalence ratio. The intensity ratios $I_{OH^*}/I_{CH^*}$ and $I_{C_2{^*}}/I_{CH^*}$ are adequate for indicating changes in the equivalence ratio with the air and fuel mass flow rates, respectively.
Keywords
Combustion; Swirl; Kerosene; Chemiluminescence; Emission Spectrum;
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