| Title |
Analysis of Combustion Oscillation and its Suppression in a Silo Type Gas Turbine Combustor |
| Authors |
서석빈(Seo, Seok-Bin) ; 안달홍(Ahn, Dal-Hong) ; 차동진(Cha, Dong-Jin) ; 박종호(Park, Jong-Ho) |
| Keywords |
연소진동 ; 가스터빈 ; 희박예혼합연소 ; 연소불안정 Combustion oscillation ; Gas turbine ; Lean premixed combustion ; Combustion instability |
| Abstract |
The present study describes an investigation into the characteristics of combustion oscillation and its suppression instability of a silo type gas turbine combustor in commercial power plant. Combustion oscillation is occurred the combustor in near full load during operation. As a result of FFT analysis of the combustion dynamics, the frequency of the oscillation is analyzed as the 1’st longitudinal mode of acoustic resonance of the combustor. For suppress of the instability, combustion tuning with adjust of fuel valve schedule is carried out, which changes equivalent ratio of each burners. As the result, the oscillation is successfully reduced with meeting the level of NOx emission regulation. |