한국생산제조학회 학술지 영문 홈페이지

Current Issue

Journal of the Korean Society of Manufacturing Technology Engineers - Vol. 29 , No. 6

[ Papers ]
Journal of the Korean Society of Manufacturing Technology Engineers - Vol. 29, No. 6, pp.422-428
Abbreviation: J. Korean Soc. Manuf. Technol. Eng.
ISSN: 2508-5107 (Online)
Print publication date 15 Dec 2020
Received 28 Sep 2020 Revised 26 Oct 2020 Accepted 30 Oct 2020
DOI: https://doi.org/10.7735/ksmte.2020.29.6.422

4 패드 저널 베어링 2상 유동 2-FSI 해석
신현장a

Two-Fluid Structure Interaction Analysis of a Four-pad Journal Bearing in a Two-phase Fluid
Hyun Jang Shina
aMechanical Engineering, Yonam Institute of Technology
Correspondence to : *Tel: +82-2-751-2077 E-mail address: shin7@snu.ac.kr (Hyun Jang Shin).


Abstract

A four-pad journal bearing is used to support high-speed, high-load turbine generators. The direct lubrication type has the merits of low power loss, low pad temperature, and high load capacity. Direct lubrication offers the additional advantages of good vibration and anti-shock characteristics. The simulation of bearings of this type requires two-phase fluid analysis because the fluid consists of a mixture of oil and air. Apart from this, because of the movement of the rotor and tilting pad, two-phase two-fluid structure interaction (2-FSI) simulation is required to determine the final locations of the rotor and pads. Finally, based on these locations, a static simulation is conducted to determine the temperature, pressure, and the oil and air distribution. The rotor moves 0.5 mm in the direction of negative gravity and the tilting pad rotates 0.09, 0.035 degrees with a minimum gap of 78 mm and maximum pressure of 10 MPa.


Keywords: 2-Way fluid structure interaction, 4 Pad journal bearing, 2 Phase fluid, CFD

References
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3. Dhande, D. Y., Pande, D. W., 2017, A Two-Way FSI Analysis of Multiphase Flow in Hydrodynamic Journal Bearing with Cavitation, Journal of the Brazilian Society of Mechanical Sciences and Engineering, 39 3399-3412, https://doi.org/10.1007/s40430-017-0750-8.
4. Kerlekar, R., Dhande, D., Nigade, N., Kondhalkar, G., 2015, Performance Analysis of 3 Lobe Hydrodynamic Journal Bearing, International Journal of Engineering Research and General Science, 3:4 1097-1101.
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6. Geller, M., Schemmann, M., Kluck, N., 2014, Simulation of Radial Journal Bearings Using the FSI Approach and A Multi-Phase Model with Integrated Cavitation, Progress in Computational Fluid Dynamics, 14:1 14-23, https://doi.org/10.1504/PCFD.2014.059196.

Hyun Jang Shin

Professor in the Department of Mechanical Engineering, Yonam Institute of Technology.His research interest is CFD, Sound & Vibration.

E-mail: Shin7@snu.ac.kr