Linear Stability Analysis of Hydrodynamic Journal Bearings Operating under Turbulent Micropolar Lubrication

Objective of this present article is to investigate into the linear stability characteristics of finite hydrodynamic journal bearing with micropolar lubrication in turbulent regime. The governing non-dimensional Reynolds equations for steady-state and dynamic pressures have been solved numerically to obtain film pressure distribution which is used to determine the linear stability characteristics in terms of critical mass parameter and whirl ratio. It is found that the higher stability threshold is obtained in micropolar lubrication than that in Newtonian lubrication. It is also observed that the threshold of stability tends to decrease with increase in Reynolds number and the whirl ratio at laminar flow condition has the lowest value.