一种双级径向旋流燃烧器的燃烧特性模拟分析  

Simulation Analysis of Combustion Characteristics of A Two-stage Radial Swirler

作　　者：唐豪杰[1] 朱鼎[1] 陶舒畅 王毅 杨安建 TANG Haojie;ZHU Ding;TAO Shuchang;WANG Yi;YANG Anjian(Central Research Academy of Dongfang Electric Corporation,611731,Chengdu,China;Dong Fang Turbine Co.,Ltd.,618000,Deyang,Sichuan,China)

机构地区：[1]东方电气集团中央研究院,成都611731 [2]东方电气东方汽轮机有限公司,四川德阳618000

出　　处：《东方电气评论》2018年第4期1-6,共6页Dongfang Electric Review

摘　　要：径向旋流器广泛应用于航空发动机和重型燃气轮机的燃烧室,用于流动、掺混和燃烧组织。本文针对一种贫预混燃烧室开展了数值模拟研究,该燃烧器采用双级旋向相反的径向旋流器设计。通过对旋流器出口及燃烧室内速度场、燃料浓度场、湍动能分布、反应区分布等特性的计算,分析了火焰结构的形成机制。结果表明,目前结构和设计条件下,该贫预混燃烧室流动和燃烧过程组织合理,火焰区域燃料浓度分布均匀并可有效避免熄火,可以有效控制NOx的排放水平。Radial swirlers are widely used for the arrangement of flow,mixing and combustion in the combustors of aeroengines and gas turbines.This paper introduces the investigation on a lean-premixed combustor with two reverse radial swirlers by CFD.The flow field,the distribution of fuel concentration,the kinetic energy of turbulence and the distribution of reaction zone are simulated and analyzed for the region near the outlet of the swirler and inside the combustor.The mechanisms for the formation of the flame structures are analyzed.The investigations show that the arrangements of flow and combustion are proper for the structure of combustors as investigated.The distributions of fuel concentration are uniform and the flame blowout phenomenon can be effectively avoided.The emission of NOx can also be reduced to a very low level by this design.

关 键 词：燃气轮机 贫预混燃烧 径向旋流器 数值模拟 

分 类 号：TK472[动力工程及工程热物理—动力机械及工程]