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http://dx.doi.org/10.6108/KSPE.2012.16.3.016

Agitation Effects of an Ultrasonic Standing Wave on the Dynamic Behavior of Methane/Air Premixed Flame  

Seo, Hang-Seok (부경대학교 대학원 에너지시스템공학과)
Lee, Sang-Shin (부경대학교 대학원 에너지시스템공학과)
Kim, Jeong-Soo (부경대학교 기계공학과)
Publication Information
Journal of the Korean Society of Propulsion Engineers / v.16, no.3, 2012 , pp. 16-23 More about this Journal
Abstract
This study has been conducted to scrutinize agitation effects of an ultrasonic standing wave on the dynamic behavior of methane/air premixed flame. The propagating flame was caught by high-speed Schlieren images, through which local flame velocities of the moving front were analyzed in unprecedent detail. It is revealed that the propagation velocity agitated by the ultrasonic standing wave is greater than that without agitation at the stoichiometric ratio: the velocity enhancement diminishes as the equivalence ratio approaches upper flammability limit or lower flammability limit. Also, vertical locations of the wave-affected frontal distortions do not vary appreciably, unless the propagating-mode characteristics (pressure amplitude and driving frequency) of ultrasonic standing wave were not changed.
Keywords
Combustion Instability; Premixed Flame; Ultrasonic Standing Wave; Flame Dynamics; Flame Structure;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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