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http://dx.doi.org/10.5139/JKSAS.2006.34.6.092

Critical Speed Analysis of the Turbopump considering the Casing Structural Flexibility  

전성민 (한국항공우주연구원)
김진한 (한국체육대학교)
곽현덕 (한국항공우주연구원)
윤석환 (한국항공우주연구원)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.34, no.6, 2006 , pp. 92-97 More about this Journal
Abstract
A critical speed analysis is performed for a 30 ton thrust turbopump considering the casing structural flexibility. A full three-dimensional finite element method including rotor and casing is used to predict rotordynamic behavior. Rotor alone model and rotor-casing coupled model with fixed-fixed and free-free boundary conditions are calculated to investigate the effects of the casing structural flexibility. The stiffness of ball bearings are applied as unloaded and loaded values to consider rotor operating conditions in vacuum and real engine respectively. From the results of the numerical analyses, it is found that the effect of the casing structural flexibility reduces the critical speeds of the turbopump. Especially, the loaded rotor condition with higher bearing stiffness is affected dramatically rather than the unloaded rotor condition with lower bearing stiffness.
Keywords
Turbopump; Critical speed; Rotordynamics; Finite Element Method;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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