Thermal effects in elastohydrodynamic lubrication of circular and elliptic contacts.

摘要

The Purpose of this research has been to develope an analytical model to investigate the thermal elastohydrodynamic lubrication of circular and elliptic contact with rolling/sliding and to design a test rig to measure the film thickness to verify the numerical results. The Reynolds and energy equations are discretized by the control volume approach and simultaneously solved by a Gauss-Seidel procedure. A non-orthogonal coordinate transformation is used to convert the curved boundary plane into one parallel to the other straight boundary. The multi-level multi-grid technique is used to accelerate the convergence. This model is used to obtain solutions for the isothermal EHD lubrication of circular contact for Non-Newtonian flow and thermal EHD lubrication of circular and elliptic contact for Newtonian flow. The test rig has been designed and fabricated to measure film thickness by using the interferometry technique. The analytical and experimental results obtained for isothermal Newtonian circular contact shows excellent correlation.