Abstract
In many practical applications, such as with vertical rotors, journal bearings operate with nearly zero eccentricities. In such situations the externally pressurized gas-lubricated porous bearings can offer a viable alternative to the self-acting gas and oil bearings which are generally prone to film induced instabilities under lightly loaded conditions.
This paper presents a thorough investigation of the dynamical behaviour of unloaded externally pressurized gas porous bearings. Expensive computations and a large number of design variables involved with the overall performance analysis make it difficult to carry out a comprehensive study of these bearings. However, an attempt has been made to bring out clearly the effect of the more important design variables on the dynamic performance of the bearings.
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