Proceedings of the KSME Conference (대한기계학회:학술대회논문집)
- 2002.08a
- /
- Pages.279-282
- /
- 2002
Numerical Analysis of Combustion Characteristics during Mode Transfer Period in a Lean Premixed Gas Turbine for Power Generation
발전용 희박예혼합 가스터빈에서 연소모드변환 시기의 연소특성 해석
- Published : 2002.08.01
Abstract
Recently, gas turbines for power generation adopt multistage DLN(Dry Low NOx) type combustion, where diffusion combustion is applied at low load and, with increase in load, the combustion mode is changed to lean premixed combustion to reduce NOx emissive concentration. However, during the mode changeover from diffusion to premixed flame, unfavorable phenomena, such as flashback, high amplitude combustion oscillations, or thermal damage of combustor parts could frequently occur. In the present study, to apply for the analysis of such unfavorable phenomena, three-dimensional CFD investigations are carried out to compare the detailed flow characteristics and temperature distribution inside the gas turbine combustor before and after combustion mode changeover. The fuel considered here is pure methane gas. A standard
Keywords