Natural Frequency Whirl Instability in an Industrial Gas Turbine
Abstract
Following failure and in-situ replacement of Bearing 1 on a two-shaft 70 MW industrial gas turbine, excessive vibration was observed on Bearing 2 a few months later.
This case study describes the vibration symptoms and discusses possible causes of the sub-synchronous vibration observed at normal operating speed. A bistable vibration phenomenon at cranking speed was also observed. The means to alleviate symptoms and hence maintain production are also discussed.
Description
Technical BriefsCollections
Citation
White, Chris (2018). Natural Frequency Whirl Instability in an Industrial Gas Turbine. Turbomachinery Laboratory, Texas A&M Engineering Experiment Station. Available electronically from https : / /hdl .handle .net /1969 .1 /172530.