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Numerical Investigation of Turbopump Bearing Heat Generation in Liquid Methane
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Liquid methane is one of the most promising candidates for the next-generation rocket propellant because it has an excellent balance between several propulsion performances such as specific impulse, storability, and ...
Friction Characteristics of SUS440C/Si3N4 Lubricated by Polytetrafluoroethylene Under Cryogenic Environment
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The friction characteristics of SUS440C-Si3N4 lubricated by polytetrafluoroethylene (PTFE) under cryogenic environment have not been researched well. The lubrication mechanisms in such friction condition need to be clarified ...
Underlying Mechanisms of Improved Cryogenic Tribological Performance of the Pure Graphite: Suppressed Thermal Atomic Motions and Enhanced Mechanical Properties
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The cryogenic tribological performance of the pure graphite was investigated through experiments and molecular dynamics simulations in this study. As a brittle material, the pure graphite cooled by liquid nitrogen exhibited ...
Effect of Nanotexturing on Increase in Elastohydrodynamic Lubrication Oil Film Thickness
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The effects of nanotexturing on oil film thickness and shape under pointcontact elastohydrodynamic lubrication (EHL) conditions were experimentally investigated. A diskonball friction tester with an optical interferometer ...
Hydrodynamic Performance Produced by Nanotexturing in Submicrometer Clearance With Surface Roughness
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Surface texturing is a promising way to expand the hydrodynamic lubrication regime and thereby modify the tribological properties of sliding surfaces. Spiralgroove textures in particular have attracted much attention over ...