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http://dx.doi.org/10.6108/KSPE.2012.16.4.057

An Experimental Study on Combustion Instability Characteristics of Various Fuel-Air Mixing Section Geometry in a Model Dump Shape Combustor  

Kim, Min-Ki (서울대학교 기계항공공학부 대학원)
Yoon, Ji-Su (서울대학교 기계항공공학부 대학원)
Hwang, Jeong-Jae (서울대학교 기계항공공학부 대학원)
Yoon, Young-Bin (서울대학교 기계항공공학부, IAAT)
Publication Information
Journal of the Korean Society of Propulsion Engineers / v.16, no.4, 2012 , pp. 57-69 More about this Journal
Abstract
The main objective of this study was investigation of natural gas flames in a lean premixed swirl-stabilized dump combustor with an attention focused on the effect of the various fuel-air mixing section geometry on the combustion instability characteristics. The combustor and mixing section length was varied in order to have different acoustic resonance characteristics from 800 to 1800 mm in combustor and 470, 550, 870 mm in mixing section. We observed two dominant instability frequencies in this study. Lower frequencies were associated with a fundamental longitudinal mode of combustor length. Higher frequencies were related to secondary longitudinal mode of coupled with the combustor and mixing section. As a result, combustion instability was strongly affected by acoustic characteristics of combustor and mixing section geometry.
Keywords
Premixed Flame; Combustion Instability; Mode Analysis; Inlet Mixing Section;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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