Title page for etd-0801114-094934


[Back to Results | New Search]

URN etd-0801114-094934
Author Chien-Cheng Liao
Author's Email Address No Public.
Statistics This thesis had been viewed 5333 times. Download 0 times.
Department Mechanical and Electro-Mechanical Engineering
Year 2013
Semester 2
Degree Master
Type of Document
Language zh-TW.Big5 Chinese
Title Thermal Effect on a Mixed-Film Lubrication with Oil-in-Water Emulsions
Date of Defense 2014-07-28
Page Count 83
Keyword
  • adsorbed layer
  • slide/roll ratio
  • emulsion
  • thermal EHL
  • Abstract A mixed-film model with two adsorbed layers on the solid surfaces and an emulsion layer between them is proposed to explain the lubrication mechanism of emulsion for thermal elastohydrodynamic lubrication (TEHL). In this study, the modified Reynolds and energy equations are derived and solved simultaneously by the Newton-Raphson method. Effects of the oil concentration, slide/roll ratio, adsorbed layer thickness and load on the lubrication characteristics of the emulsion are investigated.
    Results show that the greater oil concentration, the greater mean temperature rise of the film under a certain of thickness of the adsorbed layer. However, the mean temperature rise of the film is less than that of the pure oil due to higher shear heating of the pure oil. Since the variation of the velocity across the film of the adsorbed layer is very small, the shear heating generated by the adsorbed oil is very small. Consequently, the mean temperature of the adsorbed layer is less than that of the emulsion layer. The mean temperature rise of the solid surface with the adsorbed layer is higher than that without the adsorbed layer due to the lower heat conductivity of the adsorbed oil to insulate the heat flux across the film. Furthermore, the maximum mean temperature rise slightly increases along with the thickness of adsorbed layer. The maximum mean temperature rise increases along with the slide/roll ratio and load, but the minimum film thickness decreases with increasing slide/roll ratio and load.
    Advisory Committee
  • Yeau-ren Jeng - chair
  • Jen-Fin Lin - co-chair
  • Rong-Tsong Lee - advisor
  • Yuang-Cherng Chiou - advisor
  • Files
  • etd-0801114-094934.pdf
  • Indicate in-campus at 5 year and off-campus access at 5 year.
    Date of Submission 2014-09-01

    [Back to Results | New Search]


    Browse | Search All Available ETDs

    If you have more questions or technical problems, please contact eThesys