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Tomoko Hirayama
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Journal Articles

Friction Characteristics of SUS440C/Si 3 N 4 Lubricated by Polytetrafluoroethylene Under Cryogenic Environment

Hiromitsu Kakudo, Satoshi Takada, Tomoko Hirayama
Journal: Journal of Tribology
Publisher: ASME
Article Type: Research Papers
J. Tribol. October 2023, 145(10): 101702.
Paper No: TRIB-23-1038
https://doi.org/10.1115/1.4062486
Published Online: May 19, 2023
View Article titled, Friction Characteristics of SUS440C/Si 3 N 4 Lubricated by Polytetrafluoroethylene Under Cryogenic Environment
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Topics: Friction, Lubrication
Journal Articles

Numerical Investigation of Turbopump Bearing Heat Generation in Liquid Methane

Hiromitsu Kakudo, Satoshi Takada, Tomoko Hirayama
Journal: Journal of Tribology
Publisher: ASME
Article Type: Research Papers
J. Tribol. August 2023, 145(8): 084301.
Paper No: TRIB-22-1288
https://doi.org/10.1115/1.4062294
Published Online: May 2, 2023
View Article titled, Numerical Investigation of Turbopump Bearing Heat Generation in Liquid Methane
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Topics: Bearings, Heat, Fluids, Friction
Journal Articles

Hydrodynamic Performance Produced by Nanotexturing in Submicrometer Clearance With Surface Roughness

Tomoko Hirayama, Heinosuke Shiotani, Kazuki Yamada, Naoki Yamashita, Takashi Matsuoka, Hiroshi Sawada, Kosuke Kawahara
Journal: Journal of Tribology
Publisher: ASME
Article Type: Research-Article
J. Tribol. January 2015, 137(1): 011704.
Paper No: TRIB-14-1101
https://doi.org/10.1115/1.4028736
Published Online: October 23, 2014
View Article titled, Hydrodynamic Performance Produced by Nanotexturing in Submicrometer Clearance With Surface Roughness
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Topics: Clearances (Engineering), Disks, Friction, Stress, Surface roughness, Flow (Dynamics), Lubrication, Waves, Viscosity
Journal Articles

Effect of Nanotexturing on Increase in Elastohydrodynamic Lubrication Oil Film Thickness

Tomoko Hirayama, Mitsutaka Ikeda, Toshiteru Suzuki, Takashi Matsuoka, Hiroshi Sawada, Kosuke Kawahara
Journal: Journal of Tribology
Publisher: ASME
Article Type: Research-Article
J. Tribol. July 2014, 136(3): 031501.
Paper No: TRIB-13-1200
https://doi.org/10.1115/1.4027286
Published Online: April 25, 2014
View Article titled, Effect of Nanotexturing on Increase in Elastohydrodynamic Lubrication Oil Film Thickness
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Topics: Film thickness, Shapes
Proceedings Papers

New Estimations of Surface Properties for Tribological Studies by Neutron Reflectometry

Tomoko Hirayama, Hiroki Takemoto, Kazuko Inoue, Toru Ebisawa, Seiji Tasaki, Masahiro Hino, Naoya Torikai, Hirohiko Shimizu, Kazuaki Ikeda
Proc. ASME. WTC2005, World Tribology Congress III, Volume 1, 517-518, September 12–16, 2005
Publisher: American Society of Mechanical Engineers
Paper No: WTC2005-63797
https://doi.org/10.1115/WTC2005-63797
View Paper titled, New Estimations of Surface Properties for Tribological Studies by Neutron Reflectometry
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Topics: Neutrons, Surface properties, Tribology, Metals, Metal surfaces, Cathode ray oscilloscopes, Electron beams, Film thickness, Lubricants, Neutron beams
Proceedings Papers

Optimization of Groove Dimensions in Spiral-Grooved Journal Bearings for Spindles of Precision Equipments

Tomoko Hirayama, Naomi Yamaguchi, Shingo Sakai, Noriaki Hishida, Hiroshi Yabe
Proc. ASME. WTC2005, World Tribology Congress III, Volume 2, 117-118, September 12–16, 2005
Publisher: American Society of Mechanical Engineers
Paper No: WTC2005-63795
https://doi.org/10.1115/WTC2005-63795
View Paper titled, Optimization of Groove Dimensions in Spiral-Grooved Journal Bearings for Spindles of Precision Equipments
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Topics: Dimensions, Journal bearings, Optimization, Bearings, Rotors, Stress, Ball bearings, Damping, Design, Disks
Journal Articles

A Theoretical Analysis Considering Cavitation Occurrence in Oil-Lubricated Spiral-Grooved Journal Bearings With Experimental Verification

Tomoko Hirayama, Takeo Sakurai, Hiroshi Yabe
Journal: Journal of Tribology
Publisher: ASME
Article Type: Technical Papers
J. Tribol. July 2004, 126(3): 490–498.
https://doi.org/10.1115/1.1691436
Published Online: June 28, 2004
View Article titled, A Theoretical Analysis Considering Cavitation Occurrence in Oil-Lubricated Spiral-Grooved Journal Bearings With Experimental Verification
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Topics: Bearings, Cavitation, Journal bearings, Pressure, Flow (Dynamics), Stress, Clearances (Engineering)