北京航空航天大学学报 ›› 2018, Vol. 44 ›› Issue (6): 1265-1272.doi: 10.13700/j.bh.1001-5965.2017.0392

• 论文 • 上一篇    下一篇

预燃级旋流数对TeLESSⅡ燃烧室贫油熄火性能影响

肖荣洪1, 林宇震1,2, 张弛1,2   

  1. 1. 北京航空航天大学 能源与动力工程学院, 北京 100083;
    2. 先进航空发动机协同创新中心, 北京 100083
  • 收稿日期:2017-06-12 出版日期:2018-06-20 发布日期:2018-06-28
  • 通讯作者: 林宇震.E-mail:linyuzhen@buaa.edu.cn E-mail:linyuzhen@buaa.edu.cn
  • 作者简介:肖荣洪 男,硕士研究生。主要研究方向:航空发动机燃烧性能;林宇震 男,博士,教授,博士生导师。主要研究方向:航空发动机燃烧室前沿理论及技术。

Effect of swirl number of pilot stage on TeLESS Ⅱ combustor's lean blow-out performance

XIAO Ronghong1, LIN Yuzhen1,2, ZHANG Chi1,2   

  1. 1. School of Energy and Power Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China;
    2. Collaborative Innovation Center for Advanced Aero-Engine, Beijing 100083, China
  • Received:2017-06-12 Online:2018-06-20 Published:2018-06-28

摘要: 北京航空航天大学发展的TeLESSⅡ低排放燃烧室采用中心分级的布局方式,其中心为经典的旋流杯结构预燃级,为燃烧室提供稳定的点火源,预燃级外圈采用预混设计的单级轴向旋流器的主燃级以降低排放。研究了预燃级一级旋流器和二级旋流器的旋流数组合对燃烧室熄火性能的影响,研究表明预燃级的设计在中心分级低排放燃烧室火焰稳定中扮演重要角色。在常温常压条件下的单头部燃烧室上测量贫油熄火油气比,并通过数值计算对比分析不同方案在熄火时的气动热力特征。研究表明:回流区总温越高燃烧室贫油熄火油气比越低,二级旋流数减少有利于火焰和流场的耦合,从而提高回流区火焰稳定,拓宽贫油熄火边界。一级旋流数增加贫油熄火油气比不是随之降低。

关键词: 中心分级燃烧室, 预燃级, 旋流数, 旋流杯, 贫油熄火

Abstract: The next generation of technology of low emission of stirred swirl (TeLESSⅡ)low-emission combustor developed by Beihang University adopted a central staged arrangement. The center of the dome was classic swirl cup pilot structure which could provide a stable ignition source for the combustor. The main stage arranged outer of the pilot stage which adopted a pre-mixed single axial cyclone design was used to reduce emission. The influence of the combination of the swirl number of the pilot first stage and the secondary stage on the blow-out performance of the combustor was studied. The pilot stage is found playing an important role in the stabilization of flame in low-emission combustor. The gas-oil ratio was measured in the single dome combustor under normal temperature and pressure conditions. The aerodynamic characteristics of different cases were analyzed by numerical calculation. The results show that the higher the total temperature in the recirculation zone is, the lower the gas-oil ratio for lean blow-out is, and the decrease of pilot secondary stage's swirl number isfavorable to the coupling between the flame and flow field. Therefore, the flame in the recirculation zone is more stable and the lean blow-out boundary becomes broader. With the increase of the pilot first stage's swirl number, the gas-oil ratio for lean blow-out is not reduced.

Key words: central staged combustor, pilot stage, swirl number, swirl cup, lean blow-out

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