淬熄高度和空气分配比例对RQL燃烧室燃烧特性的影响

doi:10.16183/j.cnki.jsjtu.2022.197

上海交通大学学报 ›› 2024, Vol. 58 ›› Issue (3): 312-323.doi: 10.16183/j.cnki.jsjtu.2022.197

淬熄高度和空气分配比例对RQL燃烧室燃烧特性的影响

惠蕾, 刘爱虢(), 吴小取, 张云杰, 曾文

沈阳航空航天大学航空发动机学院; 辽宁省航空推进系统先进测试技术重点实验室, 沈阳 110136

收稿日期:2022-06-06 修回日期:2022-10-31 接受日期:2022-10-31 出版日期:2024-03-28 发布日期:2024-03-28
通讯作者: 刘爱虢,教授,电话(Tel.):024-89728892;E-mail:agliu@sau.edu.cn.
作者简介:惠蕾(1998-),硕士生,从事燃烧室的设计和分析技术研究.
基金资助:
沈阳市科技计划项目(22-322-3-30);辽宁省教育厅高等学校基本科研项目(通航专项)(LJKZ0225)

Influence of Quenching Height and Air Distribution Ratio on Combustion Characteristics of RQL Combustor

HUI Lei, LIU Aiguo(), WU Xiaoqu, ZHANG Yunjie, ZENG Wen

School of Aero-Engine; Liaoning Key Laboratory of Advanced Measurement and Test Technique for Aviation Propulsion Systems, Shenyang Aerospace University, Shenyang 110136, China

Received:2022-06-06 Revised:2022-10-31 Accepted:2022-10-31 Online:2024-03-28 Published:2024-03-28

摘要/Abstract

摘要：

基于富油/淬熄/贫油(RQL)技术原理,设计一种燃气轮机低排放燃烧室.在保持燃烧室进口参数不变的前提下,研究不同淬熄结构高度及空气流量分配比例对燃烧室内流场、温度场及污染物生成特性的影响.结果表明:淬熄结构高度和空气分配比例是影响燃烧室燃烧性能的重要参数,随着淬熄结构高度的降低,燃烧室出口氮氧化物NO_x的排放量增加;随着富油区主燃孔与淬熄空气质量流量的空气分配比例降低,燃烧室出口NO_x的排放量先降低后增加,存在一个最佳的空气分配比例使NO_x排放量最低;热力型NO_x的生成量与温度高于 1 900 K的区域大小和最高燃气温度存在直接关系.基于此设计的燃烧室在所研究的工况下,最低NO_x排放量可低于35 mg/m³,达到了低污染燃烧室排放标准.

关键词: 富油/淬熄/贫油燃烧室, 淬熄结构, 空气分配, 氮氧化物

Abstract:

Based on the principle of the rich-burn/quench/lean-burn (RQL) technology, a low emission combustion chamber for gas turbine was designed. The effects of different heights of quenching structure and distribution ratios of the air flow on the flow field, temperature field, and pollutant formation characteristics of combustion chamber were studied under the premise of keeping the inlet parameters of combustion chamber unchanged. The results show that the height of quenching structure and the proportion of air distribution are important parameters affecting the combustion performance of the combustion chamber. With the decrease of the height of quenching structure, the NO_x emission increases at the exit of the combustion chamber. The NO_x emission from combustion chamber outlet first decreases and then increases with the decrease of the proportion of air mass flow from the main combustion hole to the fired air mass flow in oil-rich areas, and an optimal proportion of air mass flow makes the NO_x minimum. The production of thermal NO_x is directly related to the size of the region with a temperature higher than 1 900 K and the maximum gas temperature. The designed combustion chamber has a minimum NO_x emission of less than 35 mg/m³ under the studied working conditions, which achieves the emission standard of a low pollution combustion chamber.

Key words: rich-burn/quench/lean-burn (RQL) combustion chamber, quenching structure, air distribution, nitrogen oxides (NO_x)

中图分类号:

TK16
V231.2

惠蕾, 刘爱虢, 吴小取, 张云杰, 曾文. 淬熄高度和空气分配比例对RQL燃烧室燃烧特性的影响[J]. 上海交通大学学报, 2024, 58(3): 312-323.

HUI Lei, LIU Aiguo, WU Xiaoqu, ZHANG Yunjie, ZENG Wen. Influence of Quenching Height and Air Distribution Ratio on Combustion Characteristics of RQL Combustor[J]. Journal of Shanghai Jiao Tong University, 2024, 58(3): 312-323.

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方案	淬熄结构高度/mm		富油区当量比
方案	外环	内环	富油区当量比
1	19.4	19.4	1.25、1.40、1.50
2	19.4	16.4	1.25、1.40、1.50
3	16.4	16.4	1.25、1.40、1.50
4	16.4	13.4	1.25、1.40、1.50

方案	总压恢复系数	燃烧效率
1	0.4	-0.2
2	0.5	-0.1

淬熄高度和空气分配比例对RQL燃烧室燃烧特性的影响

Influence of Quenching Height and Air Distribution Ratio on Combustion Characteristics of RQL Combustor

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