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http://dx.doi.org/10.3795/KSME-B.2004.28.8.945

Acoustic Analysis for Design Optimization of Hub-Blade Baffle in Liquid Rocket Engine  

Kim, Hong-Jip (한국항공우주연구원 엔진그룹)
Kim, Seong-Ku (한국항공우주연구원 엔진그룹)
Seol, Woo-Seok (한국항공우주연구원 엔진그룹)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.28, no.8, 2004 , pp. 945-952 More about this Journal
Abstract
Acoustic characteristics of combustion chamber having various baffle configurations are numerically investigated by linear acoustic analysis to suggest reliable baffle specifications in first stage of KSLV-I. To determine the configuration of baffles, an acoustic modal analysis as well as the macroscopic analysis has been done. Hub has another effect of suppressing transverse acoustic mode by confining flow in baffled compartment over general effect of increase in acoustic damping of radial acoustic modes. So, a sufficient number of hub needs to be installed to obtain acoustic damping capacity. 3-blade configuration designed to suppress the first tangential mode has relatively low damping capacity, compared to 5 or 6-blade one. Optimum value of axial baffle length has been determined by comparing acoustic characteristics of combustion chamber having various baffle lengths.
Keywords
Combustion Instability; Acoustic Analysis; Damping Factor;
Citations & Related Records
Times Cited By KSCI : 6  (Citation Analysis)
연도 인용수 순위
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