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http://dx.doi.org/10.5293/KFMA.2003.6.1.051

A Study on the Oil-free Turbocharger Supported by Air Foil Bearing  

Lee Yong-Bok (한국과학기술연구원 트라이볼로지 연구센터)
Kim Tae-Ho (한국과학기술연구원 트라이볼로지 연구센터)
Kim Chang-Ho (한국과학기술연구원 트라이볼로지 연구센터)
Sa Jong-Sung (서일대학 자동차과)
Lee Nam-Soo (한양대학교 기계설계공학과)
Publication Information
The KSFM Journal of Fluid Machinery / v.6, no.1, 2003 , pp. 51-56 More about this Journal
Abstract
The feasibility study on the oil-free turbocharger supported by air foil bearings is investigated. Using the perturbation method, dynamic characteristics of air foil bearings are calculated based on the static equilibrium position of a turbocharger rotor is predicted. With collaboration of calculated stiffness and damping of foil bearing, rotordynamic analysis is performed using the finite element method. The effects of bump compliance and bearing clearance on rotordynamic characteristics of the oil-free turbocharger such as the critical speeds, eccentricity ratio, vibration amplitude and stability are investigated.
Keywords
Air foil bearing; oil-free turbocharger; rotordynamics;
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  • Reference
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[ Fellenstein, J. A. ] / NASA TM-106753