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http://dx.doi.org/10.6108/KSPE.2012.16.4.042

Critical Speed Analysis of a 75 Ton Class Liquid Rocket Engine Turbopump due to Load Characteristics  

Jeon, Seong-Min (한국항공우주연구원 터보펌프팀)
Kwak, Hyun-D. (한국항공우주연구원 터보펌프팀)
Hong, Soon-Sam (한국항공우주연구원 터보펌프팀)
Kim, Jin-Han (한국항공우주연구원 터보펌프팀)
Publication Information
Journal of the Korean Society of Propulsion Engineers / v.16, no.4, 2012 , pp. 42-49 More about this Journal
Abstract
Critical speed of high thrust liquid rocket engine turbopump is obtained through a rotordynamic analysis and a unloaded turbopump test is peformed for validation of the numerical model. The first critical speed predicted by the numerical analysis is correlated well with the test result for the bearing unloaded rotor condition only considering mass unbalance load. Using the previous rotordynamic model, critical speed variation is estimated as a function of varied bearing stiffness due to pump and turbine radial loads with relative angle difference. From the numerical analysis, it is found that the relative angle difference of pump and turbine radial loads greatly affects the critical speed. However, additional axial load reduces the effect derived from the relative angle difference of radial loads.
Keywords
Liquid Rocket Engine; Turbopump; Rotordynamics; Bearing; Critical Speed;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
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