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TECHNICAL PAPERS

Effect of Fluid Inertia on Stability of Oil Journal Bearings

[+] Author and Article Information
S. K. Kakoty, B. C. Majumdar

Department of Mechanical Engineering, Indian Institute of Technology, Kharagpur-721 302, India

J. Tribol 122(4), 741-745 (Feb 15, 1999) (5 pages) doi:10.1115/1.1288590 History: Received January 16, 1998; Revised February 15, 1999
Copyright © 2000 by ASME
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References

Pinkus, O., and Sternlicht, B., 1961, Theory of Hydrodynamic Lubrication, McGraw-Hill, New York.
Constantinescu, V. N., 1977, “On Dynamic Effects Due to Inertia Forces in Lubricating Films,” Proceedings of 2nd Leeds-Lyon Symposium on Tribology, Sept. 1975, published by Mech. Engg. Publ. Ltd., pp. 97–105.
Launder,  B. E., and Leschziner,  M., 1978, “Flow in Finite-Width, Thrust Bearings Including Inertial Effects I-Laminar Flow,” ASME J. Lubr. Technol., 100, pp. 330–338.
Reinhardt,  E., and Lund,  J. W., 1975, “The Influence of Fluid Inertia on the Dynamic Properties of Journal Bearings,” ASME J. Lubr. Technol., 97, pp. 159–167.
Banerjee,  M. B., Shandil,  R. G., Katyal,  S. P., Dube,  G. S., Pal,  T. S., and Banerjee,  K., 1986, “A Nonlinear Theory of Hydrodynamic Lubrication,” J. Math. Anal. Appl., 117, pp. 48–56.
Chen,  Chen-Hain, and Chen,  Chato-Kuang, 1989, “The Influence of Fluid Inertia on the Operating Characteristics of Finite Journal Bearings,” Wear, 131, pp. 229–240.
Katory, S. K., and Majumdar, B. C., 1997, “The Influence of Fluid Inertia on the Steady-state Characteristics and Stability of Journal Bearings,” Proceedings of 9th National Conference on Machines and Mechanisms (NACOMM-97), IIT, Kanpur, India, pp. B-15–B-26.
Constantinescu,  V. N., and Galetuse,  S., 1974, “On the Possibilities of Improving the Accuracy of the Evaluation of Inertia Forces in Laminar and Turbulent Films,” ASME J. Lubr. Technol., 96, pp. 69–79.
Akers,  A., Michaelson,  S., and Cameron,  A., 1971, “Stability Contours for a Whirling Finite Journal Bearing,” ASME J. Lubr. Technol., 93, pp. 177–190.
Majumdar, B. C., and Brewe, D. E., 1987, “Stability of a Rigid Rotor Supported on Oil-Film Journal Bearings Under Dynamic Load,” NASA Technical Memorandum 102309, AVS-COM, Technical Report 87-C-26, pp. 1–10.

Figures

Grahic Jump Location
Trajectory of the center of journal under unidirectional constant load (L/D=1.0,ε0=0.7). The shaft position after every revolution is marked sequentially (whirl ratio=0.36).
Grahic Jump Location
Stability curve for different Re* . L/D=2.0 (whirl ratio versus eccentricity ratio).
Grahic Jump Location
Stability curve for different Re* . L/D=2.0 (mass parameter versus eccentricity ratio).
Grahic Jump Location
Stability curve for different Re* . L/D=1.0 (whirl ratio versus eccentricity ratio).
Grahic Jump Location
Stability curve for different Re* . L/D=1.0 (a) mass parameter versus eccentricity ratio; (b) mass parameter versus Sommerfeld number.
Grahic Jump Location
Stability curve for different Re* . L/D=0.5 (whirl ratio versus eccentricity ratio).
Grahic Jump Location
Stability curve for different Re* . L/D=0.5 (mass parameter versus eccentricity ratio).
Grahic Jump Location
Stability curve for Re* =0.0 and Re* =0.1. L/D=1.0 (whirl ratio versus eccentricity ratio).
Grahic Jump Location
Stability curve for Re* =0.0 and Re* =0.1. L/D=1.0 (mass parameter versus eccentricity ratio).
Grahic Jump Location
Trajectory of the center of journal under unidirectional constant load (L/D=0.5,ε0=0.2). The shaft position after every revolution is marked sequentially (whirl ratio=0.5).
Grahic Jump Location
Schematic diagram of a journal bearing

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