Static characteristics of rotor bearing system lubricated with couple stress fluids

✍ Scribed by Jaw-Ren Lin

• Publisher: Elsevier Science
• Year: 1997
• Tongue: English
• Weight: 684 KB
• Volume: 62
• Category: Article
• ISSN: 0045-7949
• DOI: 10.1016/s0045-7949(96)00196-4

✦ Synopsis

On the basis of microcontinuum theory, the main objective of this paper is to theoretically predict the influence of the couple stress effects on the performance of a rotor bearing system. To account for the couple stress effects due to the lubricants containing polar suspensions, the generalized, modified Reynolds equation is derived from the continuity equation and the Stokes' constitutive equations. To obtain a closed-form solution, the narrow bearing approximation is then considered. According to the calculated results, the influence of couple stress effects on the characteristics of the system is apparent and not negligible.

Comparing with the Newtonian case, the couple stress effects of fluids containing suspensions provide an enhancement in the load capacity, as well as a reduction in the attitude angle and the friction parameter.

As a result, the couple stress effects signify an improvement in the bearing characteristics of the system. Copyright