Rotordynamics/discharge water-hammer coupling via seals in pump rotordynamics

Title:	Rotordynamics/discharge water-hammer coupling via seals in pump rotordynamics
Author:	Zhang, Kaikai
Abstract:	A new closed-loop frequency-domain model is developed to incorporate the water hammer effect with pump rotordynamics, in order to investigate the sub-synchronous instability problem observed in a field pump. Seal flow-rate perturbations due to eccentricity are calculated from Soulas and San Andres's seal code. A complete transfer function matrix between rotor motion and reaction force due to pressure perturbation is developed in detail. Stability analysis with transfer-function'add-in' modules is conducted in XLTRC2. Seal clearances and the reaction force angle are found to be important in shifting natural frequencies and damping. The sub-synchronous instability observed in field is duplicated successfully with double-clearance seals.
Publisher:	Texas A&M University
Subject:	rotordynamics discharge water-hammer subsynchronous instability seal flow-rate
URI:	http://handle.tamu.edu/1969.1/514
Date:	2004-09-30

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