Combustion Instability Comprehension with Combustion Chamber Length in Dual Swirl Gas Turbine Model Combustor from Flame Behaviors

화염거동을 통한 이중선회 가스터빈 모델 연소기에서 연소실 길이에 따른 연소 불안정성 이해

This study is to investigate the combustion instability of the variation of combustion chamber length in dual swirl gas turbine model combustor. When equivalence ratio was fixed at 1.1, as the length of the combustion chamber increases the value of the frequency decreased in 7kW while the value of the frequency was constant in 4kW. The analysis of flame behaviors by high speed camera was conducted to identify such trend.