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http://dx.doi.org/10.5139/JKSAS.2008.36.7.688

Rotordynamic Analysis of a High Thrust Liquid Rocket Engine Turbopump  

Jeon, Seong-Min (한국항공우주연구원 터보펌프팀)
Kwak, Hyun-Duck (한국항공우주연구원 터보펌프팀)
Yoon, Suk-Hwan (한국항공우주연구원 터보펌프팀)
Kim, Jin-Han (한국항공우주연구원 터보펌프팀)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.36, no.7, 2008 , pp. 688-694 More about this Journal
Abstract
A rotordynamic analysis is performed for a high thrust class liquid rocket engine turbopump considering the dynamic characteristics of ball bearings and pump noncontact seals. Complex eigenvalue problems are solved to predict the rotating natural frequencies and damping ratios as a function of rotating speeds. Synchronous rotor mass unbalance response and time transient response analyses are also performed to figure out the rotor critical speed and the onset speed of instability. From the numerical analysis, it is found that the rear bearing stiffness is most important parameter for the critical speed and instability because the 1st mode is turbine side shaft bending mode. The pump seal effect on the critical speed is enlarged as the rear bearing stiffness decreases and the front bearing stiffness increases.
Keywords
Turbopump; Rotordynamics; Critical speed; Instability;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
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