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Research Papers: Hydrodynamic Lubrication

Performance Analysis of Capillary Compensated Hybrid Journal Bearing by Considering Combined Influence of Thermal Effects and Micropolar Lubricant

[+] Author and Article Information
Pankaj Khatak

Department of Mechanical Engineering,
Guru Jambheshwar University of
Science and Technology,
Hisar 125001, India
e-mail: pankajkhatak@gmail.com

H. C. Garg

Professor
Department of Mechanical Engineering,
Guru Jambheshwar University of
Science and Technology,
Hisar 125001, India
e-mail: hcgarg@gmail.com

Contributed by the Tribology Division of ASME for publication in the JOURNAL OF TRIBOLOGY. Manuscript received January 31, 2016; final manuscript received May 12, 2016; published online August 16, 2016. Assoc. Editor: George K. Nikas.

J. Tribol 139(1), 011707 (Aug 16, 2016) (12 pages) Paper No: TRIB-16-1044; doi: 10.1115/1.4033715 History: Received January 31, 2016; Revised May 12, 2016

The viscous dissipation of micropolar lubricant results in temperature increase of hole-entry hybrid journal bearing. Thermohydrostatic (THS) performance characteristics are computed by the concurrent solution of micropolar Reynolds, micropolar energy, and conduction equations. The results obtained numerically indicate that bearing is significantly affected by increase in temperature. Hence, it is essential to consider the thermal effects for bearing operating with micropolar lubricant to produce realistic bearing characteristic data.

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References

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Figures

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Fig. 1

Configuration of hole entry hybrid journal bearing

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Fig. 3

Load-carrying capacity versus eccentricity ratio

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Fig. 4

Maximum temperature versus eccentricity ratio

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Fig. 5

Variation of mid-film temperature with α

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Fig. 6

Two-dimensional isothermal and THS pressure distribution: (a) Newtonian and (b) N2 = 0.8 and lm = 10

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Fig. 7

Variation of minimum fluid film thickness

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Fig. 8

Variation of bearing flow

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Fig. 9

Variation of attitude angle

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Fig. 10

Variation of horizontal direct stiffness coefficient

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Fig. 11

Variation of vertical direct stiffness coefficient

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Fig. 12

Variation of horizontal cross-coupled stiffness coefficient

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Fig. 13

Variation of vertical cross-coupled stiffness coefficient

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Fig. 14

Variation of horizontal direct damping coefficient

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Fig. 15

Variation of cross-coupled damping coefficient

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Fig. 16

Variation of vertical direct damping coefficient

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Fig. 17

Variation of threshold speed

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Fig. 18

Variation of critical mass

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