The oil lubricating hydrodynamic journal bearing is an important load-bearing component of the large rotating machinery. In its clearance, the hydrodynamic-pressured and cavitation effect coexist, forming the gas-liquid two phase flow, the characteristics of which affect both the bearing performance and safety operation of the equipment. The influence of non-condensable gas(NCG) contend in lubricating oil is investigated. It is considered that NCG can cause the oil to deviate from its nominal performance an...