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박의철,서석빈,정재화,안달홍,김종진,차동진 한밭대학교 생산기반기술연구소 2002 생산기반기술연구소 논문집 Vol.2 No.1
Characteristics of transient flow in fuel supply system of a DLN(dry low NOx) utility gas turbine burning natural gas have been investigated numerically by utilizing a commercial MOC (method of characteristics) code. The gas turbine often experiences momentary combustion upset, especially when its combustion mode changes. The solution domain encompasses the intake gas pressure regulator of the power plant to the combustor of the DLN gas turbine. Some numerical results in this study agree very well with the experimental ones. Then, several parameters regarding opening ratios of control valves in the fuel supply system are varied to see the characteristics of transient flow of the natural gas. Results of this study may be useful to understand and/or reduce the combustion instability of the DLN gas turbine.