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Research Papers: Hydrodynamic Lubrication

Effect of Groove Textures on the Performances of Gaseous Bubble in the Lubricant of Journal Bearing

[+] Author and Article Information
F. M. Meng

The State Key Laboratory
of Mechanical Transmission,
Chongqing University,
Chongqing 400044, China;
Aerospace System Engineering Shanghai,
Shanghai Key Laboratory
of Spacecraft Mechanism,
Shanghai 201109, China
e-mail: fmmeng@cqu.edu.cn

L. Zhang

College of Mechanical Engineering,
Chongqing University,
Chongqing 400044, China
e-mail: zl00@cqu.edu.cn

T. Long

The State Key Laboratory
of Mechanical Transmission,
Chongqing University,
Chongqing 400044, China
e-mail: youshide@qq.com

1Corresponding author.

Contributed by the Tribology Division of ASME for publication in the JOURNAL OF TRIBOLOGY. Manuscript received September 4, 2015; final manuscript received June 28, 2016; published online October 10, 2016. Assoc. Editor: Robert L. Jackson.

J. Tribol 139(3), 031701 (Oct 10, 2016) (11 pages) Paper No: TRIB-15-1329; doi: 10.1115/1.4034247 History: Received September 04, 2015; Revised June 28, 2016

Effects of groove textures on the performances for gaseous bubbles in the lubricant used for a textured journal bearing is studied under the consideration of thermal effect of lubricant. The Reynolds, energy, and Rayleigh–Plesset (RP) equations are solved simultaneously for simulating the behavior of the bubble. Numerical results show that the gaseous bubble radius shows a nonlinearly oscillation in a full cycle period, and high bubble pressure and temperature appear when the bubble collapses. Moreover, appropriately choosing groove length, width, or interval can reduce the maximum radius, collapse pressure, and collapse temperature of the bubble. There exists a critical groove depth minimizing the bubble pressure and temperature.

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Figures

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Fig. 1

Schematic of the textured bearing and groove: (a) schematic of textured bearing, (b) middle section for textured bearing, and (c) groove size

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Fig. 3

Schematic diagram of travel trait for bubble

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Fig. 2

Schematic of the heat transfer of bubble

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Fig. 4

Flowchart of the solution

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Fig. 5

Comparison of bubble radius between present study and Qin et al. [17]

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Fig. 6

Distribution of bubble radius at varied groove width w: (a) w = 2.6 mm, (b) w = 3.0 mm, (c) w = 3.6 mm, and (d) w = 4.0 mm

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Fig. 7

Distribution of film pressure at varied groove width w

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Fig. 8

Pressure and temperature inside bubble at varied groove width w: (a) pressure inside bubble and (b) temperature inside bubble

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Fig. 9

Distribution of temperature (w = 3.0 mm)

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Fig. 10

Distribution of pressure at varied groove length l

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Fig. 11

The maximum bubble radius at varied groove length l

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Fig. 12

Pressure and temperature inside bubble at varied groove length l: (a) pressure inside bubble and (b) temperature inside bubble

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Fig. 13

The maximum bubble radius at varied groove depth d

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Fig. 14

Distribution of pressure at varied groove depth d

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Fig. 15

Pressure inside bubble at varied groove depth d: (a) w = 2.6 mm, (b) w = 3.0 mm, (c) w = 3.6 mm, and (d) w = 4.0 mm

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Fig. 16

Temperature inside bubble at varied groove depth d: (a) w = 2.6 mm, (b) w = 3.0 mm, (c) w = 3.6 mm, and (d) w = 4.0 mm

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Fig. 17

The maximum bubble radius at varied groove interval Δθ

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Fig. 18

Distribution of film pressure at varied groove interval Δθ

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Fig. 19

Pressure and temperature inside bubble at varied groove interval Δθ: (a) pressure inside bubble and (b) temperature inside bubble

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