다양한 열전달 경계조건을 고려한 고속 저어널 베어링의 난류 열유체 윤활 연구

A Study on Thermohydrodynamic Turbulent Lubrication of High Speed Journal Bearing Considering Various Thermal Conditions on Walls

Turbulence on the journal bearing operation is examined. And the thermal variability is studied for isothermal, convective and adiabatic conditions on the walls within some degree of journal misalignment. An efficient algorithm for the solution of the coupled turbulent Reynolds and energy equations is used to examine the effects of the various factors. The calculation data of turbulent analysis are compared with the ones of laminar analysis. Heat convection is found to play but a small role in determining friction and load. The friction distribution patterns through inside a journal bearing now appear different with high values at the front part of the bearing due to the high speed and low temperature, and a sudden decrease past the pressure maximum.