발전용 소형가스터빈 블레이드 공진 안정성 평가

Evaluation of Blade Resonance of 5MW Power Generation Gas Turbine

Doosan has been developing a 5MW class gas turbine engine, DGT-5. Campbell diagram has been used for prediction of possible occurrence of resonances of rotating machinery. The Campbell diagram consists of blade natural frequency and excitation frequency. In this paper, modal characteristics of compressor and turbine blades are investigated and Campbell diagram is obtained. We calculated compressor and turbine blade's natural frequency using ANSYS tool. The result has been verified through test.