旋流预混预蒸发装置蒸发和排放特性

基金项目: 航空基金(03C24007)

Vaporization and discharge characteristics of lean premixing prevaporizing system

1.
College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
2.
China Gas Turbine Establishment, Jiangyou 621703, China

摘要: 采用数值模拟和试验两种方法获得了两种结构的贫油预混预蒸发装置(Lean premixing and prevaporizing system,简称LPP)出口的油气混合均匀性,并采用单管燃烧室验证了LPP装置的燃烧特性.径向旋流预混装置出口的油气混合比轴向旋流预混装置更均匀;旋流器的叶片数和旋流角、预混管长度、气流速度、喷油方式等对油气混合均匀性均有比较显著的影响;在当量比高至0.5左右时,LPP燃烧室NOX和CO排放比传统燃烧室低得多;只要LPP装置出口存在回流,燃烧时就会出现回火现象.
- 燃烧室排放 /
- 贫油预混预蒸发装置 /
- 燃烧室
Abstract: Fuel-air mixture uniformity for two sets of lean premixing and prevaporizing system(LPP) was obtained numerically and experimentally,and the combustion characteristics of LPPwere verified with a tubular combustor.The results show that,there is a better fuel-air mixture uniformity at the exit of radial swirler premixing facilities than at axial ones.Vane number and swirl angle of a swirler,premixing distance,air velocity and fuel injection methods,etc,have remarkable effects on air-fuel mixture uniformity.When fuel-air equivalent ratio is bigger than0.5,COand NOXemissions of the LPPcombustor are significantly lower.In the event of presence of backflow at a LPPfacility exit,the flashback takes place during combustion.
- combustor emission /
- lean premixing and prevaporizin /
- combutor

[1]	Tacina R R.Flame tube NOx emission using a lean-directwall-injection combustor concept[R].NSA/TM-2001-211105,AIAA-2001-3271.
[2]	Holdeman J D,Chang C T.Low emission RQL flametube combustor component test results[R].NASA/TM-2001-210678.
[3]	Martino P D,Cinque G.Modelling of a lean premixed prevaporzied combustor[R].ISABE-99-7009.
[4]	Charest M R J,Gauthier J E D,Huang X.Design of a lean premixed prevaporized can combustor[R].ASME-GT-2006-91004.
[5]	Dodds W J,Ekstedt E E.Evaluation of fuel preparation systems for lean premixing prevaporizing combustors[R].ASME 85-GT-137.
[6]	Hayashi S,Yamada H.NOx emissions and autoignition in a lean premixedprevaporized Tubular Combustor at inlet air temperatures up to 1050 K[R].ISABE-2001-1044.
[7]	Liedtke O,Schulz A,Wittig S.Design study of a lean premixed prevaporized counter flow combustor for a microgas turbine[R].ASME-GT-2002-30074.
[8]	Ripplinger Th,Zarzalist N,Meikis G,et al.NOx reduction by lean premixed prevaporzied combustion[R].RTOMP-4,1998.
[9]	Hayashi S,Yoshida S,Shimodaira K,et al.Development of an LPP burner for the next-generation sst engine combustor in ESPR program[R].ISABE-2005-1145.