Rotor and Structural Dynamics of Turbomachinery by Raj Subbiah & Jeremy Eli Littleton

Rotor and Structural Dynamics of Turbomachinery by Raj Subbiah & Jeremy Eli Littleton

Author:Raj Subbiah & Jeremy Eli Littleton
Language: eng
Format: epub
ISBN: 9783319732961
Publisher: Springer International Publishing


(d) Oil whirl—During oil whirl, damping in the oil film reduces (due to dominant cross-coupled stiffness) which increases rotor sub-synchronous vibration component and reduces bearing metal temperature. Unloaded bearings are susceptible to oil whirl and/or whip.

(e) Steam whirl—When the steam unbalance forces are dominant (during partial-arc operation), they transfer energy into fluid-film bearings. This could result in unloading one of the bearings that increase rotor vibration and decrease bearing metal temperature. Steam whirl affects HP turbine bearings only.



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