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Indexed by:会议论文

Date of Publication:2016-06-29

Included Journals:EI

Volume:2224

Page Number:1180-1183

Abstract:The transient dynamics of a high speed rotor assembly of a gas turbine is presented in this paper. The critical speed analysis of the dual-rotor system is conducted to determine - whether or not the rotor is running in safe zone. To simulate the situation of sudden loss of mass of blade, a concentrated mass unbalance is created and placed on the third impeller of the compressor, and its effect to the rotor is realized through changing the profile of the rotation speed. Two types of blade loss are considered based on whether or not the rotor decelerates after the blade loss occurs. Various transient analyses are conducted for start-up and normal operations of the assembly with different parameters of loss i.e. amplitude, phase, time of occurrence and duration. The numerical analyses show the transient dynamics of the rotor assembly is significantly influenced by the loss of the blade which results in impacting dynamics of the rotor.