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http://dx.doi.org/10.6108/KSPE.2014.18.2.035

A Study on the Turbopump Rotordynamic Characteristics due to Bearing Housing Structural Flexibility  

Jeon, Seong Min (Turbopump Team, Korea Aerospace Research Institute)
Yoon, Suk-Hwan (Turbopump Team, Korea Aerospace Research Institute)
Kim, Jinhan (Turbopump Team, Korea Aerospace Research Institute)
Publication Information
Journal of the Korean Society of Propulsion Engineers / v.18, no.2, 2014 , pp. 35-41 More about this Journal
Abstract
A rotordynamic analysis is performed for a turbopump of 7 ton class liquid rocket engine considering bearing housing structural flexibility. Stiffness and damping characteristics of ball bearings and pump noncontact seals are reflected in a rotordynamic model. A dynamic model of bearing housing with lumped mass and stiffness is also applied to the rotordynamic analysis. Rotor critical speed and onset speed of instability are predicted from synchronous rotor mass unbalance response and complex eigenvalue analyses. The bearing housing structural flexibility effect on rotordynamic characteristics is investigated for both of bearing loaded and unloaded conditions respectively. From the numerical analysis, it is found that the effect of the housing structural flexibility significantly reduces the rotor critical speed and onset speed of instability.
Keywords
Liquid Rocket Engine; Turbopump; Rotordynamics; Critical Speed; Structural Flexibility;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
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