关键词: 对冲布置, 回流区, 喷口烧损, 数值模拟, 温度场, 旋流燃烧器

Abstract: In order to give a clear understanding on the burnout of swirling combustors for a 660 MW supercritical unit swirl coal-fired combustion boiler and its burnout gives large damages to this power plant, a numerical investigations by the use of ANSYS FLUENT 14.0 on the intricate mechanism of burnout are carried out by us. This numerical research concentrates on the flow field for a single swirling combustor, the flow field of the whole swirling combustors, the temperature field for the three main combustors and the over fire air nozzles, and the temperature evolution along the axis of the swirling combustor from the outlet of the combustor to the direction of the main flow field. From the above researches, some key methods are proposed by us in order to reduce the damage of burnout of combustors. This numerical research is more beneficial for the safety and stable running of swirling combustors, and it is based on theoretical research, which give more convincible reasons on the efficient and safe running of this combustor.

Key words: Refluent field, Burnout of combustors, Numerical simulation, Opposite furnace, Swirling combustion, Temperature field