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http://dx.doi.org/10.5139/JKSAS.2008.36.1.062

Effect of Multi-Swirl Injector on Acoustic Damping for Reduction of Combustion Instability  

Kim, Hyun-Sung (서울대학교 대학원 기계항공공학부)
Kim, Byung-Sun (서울대학교 대학원 기계항공공학부)
Yoon, Young-Bin (서울대학교 기계항공공학부)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.36, no.1, 2008 , pp. 62-71 More about this Journal
Abstract
Swirl injector with adjustable backhole length was analyzed to suppress high-frequency combustion instability in Liquid Rocket Engines. In order to analyze the effect of swirl injector as an acoustic absorber, swirl injector was regarded as a quarter-wave resonator and its damping capacity is verified in atmospheric temperature. Experiments were carried out with copied tubes on air core because the interior air core volume of injector has a direct effect on damping. From the experimental data, it is proved that increasing the number of injectors mounted at each anti-node point can increase acoustic damping effect. Also, when tuned injectors at 1L, 1T, 1L1T modes simultaneously are installed at each anti-node point of model chamber, the damping effect of tuned injectors with multi modes agree well with it of tuned injectors with single mode.
Keywords
Swirl Injector; Anti-node Point; Resonant Frequency; Acoustic Damper; Combustion Instabili
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
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