三旋流分级燃烧室出口温度分布特性数值研究

doi:10.3976/j.issn.1002-4026.2025080

摘要/Abstract

摘要：

为了分析三级旋流器结构对中心分级燃烧室出口温度分布特性的影响,本文构建了不同旋流数条件下预燃级与主燃级旋流器的组合结构,形成带有单头部火焰筒的燃烧室模型,并采用数值模拟方法开展研究。通过调节各级旋流器的旋流数,系统探讨其对燃烧室出口温度场分布的影响规律。研究结果表明:当预燃级旋流器旋向相反,且第一级与第二级旋流数均设定为0.85时,燃烧室内温度场分布较为理想;主燃级旋流器旋流数为1.39时,高温燃烧区分布均匀,燃烧过程更加充分,整体温度场分布效果良好。在此工况下,出口温度分布系数及出口径向温度分布系数均降至最低点,标志着燃烧室出口温度场的非均匀性得到显著改善,温度分布达到最佳均匀状态。该参数组合具有良好的工程适应性,有助于提升燃烧效率并延长下游涡轮导叶等关键部件的使用寿命。

关键词: 三级旋流器, 中心分级燃烧室, 温度场, 出口温度分布, 数值模拟

Abstract:

To analyze the impact of the three-stage swirler structure on the temperature distributions at the outlet of a centrally staged combustion chamber, in this study, we developed a combined structure of pilot-stage and main-stage swirlers under different swirl numbers to establish a combustion chamber model with a single-head flame tube and performed numerical simulations to systematically investigate how adjusting the swirl number of each stage affects the combustion chamber outlet temperature distribution. The results show that when the pilot-stage swirler rotates in the opposite direction and both the first and second stages have a swirl number of 0.85, the temperature distribution inside the combustion chamber is more favorable. Moreover, when the swirl number of the main combustion stage swirler is 1.39, the high-temperature combustion zone becomes more uniform, the combustion process is more complete and the overall temperature distribution is good. Under this condition, both the outlet temperature distribution coefficient and the outlet radial temperature distribution coefficient are reduced to their lowest points, indicating that the non-uniformity of the combustion chamber outlet temperature field has been significantly improved and the temperature distribution has reached the optimal uniformity. This parameter combination has good engineering adaptability and contributes to improved combustion efficiency and extended service life of key downstream components such as turbine guide vanes.

Key words: three-stage swirler, centrally staged combustion chamber, temperature field, outlet temperature distribution, numerical simulation

中图分类号:

V231.2

于建桥, 姜山, 宋宇佳, 王成军. 三旋流分级燃烧室出口温度分布特性数值研究[J]. 山东科学, 2026, 39(5): 114-125.

YU Jianqiao, JIANG Shan, SONG Yujia, WANG Chengjun. A numerical study on temperature distributions at outlet of a three-swirl staged combustion chamber[J]. Shandong Science, 2026, 39(5): 114-125.

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燃烧室几何参数	数值
火焰筒径向高度H₁	120
二股气流通道径向高度H₂	30
环形出口高度H₃	74
主燃区长度L_pz	108
掺混区长度L_d	180
火焰筒总长度L	288

方案	预燃级旋流器旋流数		主燃级旋流器旋流数
方案	第一级旋流数	第二级旋流数	主燃级旋流器旋流数
A	0.53(+30°)	0.85(-45°)	0.85(-45°)
B	0.85(+45°)	0.85(-45°)	0.85(-45°)
C	1.39(+60°)	0.85(-45°)	0.85(-45°)
D	3.08(+75°)	0.85(-45°)	0.85(-45°)
E	0.85(+45°)	0.53(-30°)	0.85(-45°)
F	0.85(+45°)	1.39(-60°)	0.85(-45°)
G	0.85(+45°)	3.08(-75°)	0.85(-45°)
H	0.85(+45°)	0.85(-45°)	0.53(-30°)
I	0.85(+45°)	0.85(-45°)	1.39(-60°)
J	0.85(+45°)	0.85(-45°)	3.08(-75°)

参数	方案
参数	H	B	I	J
F_OTDF	0.82	0.69	0.68	2.41