Abstract
A self-acting porous journal bearing of finite length has been analysed in order to obtain the dynamic characteristics when an active film of a homogeneous single-phase liquid lubricant extends over the whole bearing arc span. A new governing lubrication equation which considers slip flow, film curvature and unsteady motion of the journal has been derived and solved analytically to yield results in a closed form for a dynamic load, taking into account the curvature of the porous bearing matrix and thus allowing the porous wall thickness to be arbitrary. Closed form results obtained in this way are valid for any arbitrary clearance ratio C R 1 and wall thickness ratio H R 1 . The dynamic characteristics are evaluated as for impermeable bearings. The pertinent results are fully analytical in nature, simple yet exact and accurate, permitting easy and economical calculation of numerical data over a very wide range of parameters involved.
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