发电技术 ›› 2023, Vol. 44 ›› Issue (5): 712-721.DOI: 10.12096/j.2096-4528.pgt.21109

• 发电及环境保护 • 上一篇    下一篇

基于数值方法的燃气轮机贫预混旋流燃烧室单头部结构设计

杨旸1,2, 李耀强3, 张金琦3   

  1. 1.中国科学院工程热物理研究所先进燃气轮机实验室,北京市 海淀区 100190
    2.中国科学院工程热物理研究所南京未来能源系统研究院,江苏省 南京市 210000
    3.新奥能源动力科技(上海)有限公司,上海市 浦东新区 201306
  • 收稿日期:2022-11-25 出版日期:2023-10-31 发布日期:2023-10-30
  • 作者简介:杨旸(1984),女,博士,研究员,主要研究方向为燃气轮机燃烧室设计, yybelinda0000@163.com
    李耀强(1989),男,硕士,工程师,主要研究方向为燃气轮机燃烧室设计,liyaoqiang@ENN.com
    张金琦(1992),女,硕士,工程师,主要研究方向为燃气轮机燃烧室设计,zhangjinqi@enn.cn
  • 基金资助:
    国家重大科技专项资助项目(J2019-III-0020-0064)

Design of Dome Structure for A Lean Premixed Swirled Combustor of Gas Turbine Based on the Numerical Method

Yang YANG1,2, Yaoqiang LI3, Jinqi ZHANG3   

  1. 1.Advanced Gas Turbine Laboratory, Institute of Engineering Thermophysics, Chinese Academy of Sciences, Haidian District, Beijing 100190, China
    2.Nanjing Institute of Future Energy System, Institute of Engineering Thermophysics, Chinese Academy of Sciences, Nanjing 210000, Jiangsu Province, China
    3.ENN Energy Power Technology Co. , Ltd. , Pudong New Area, Shanghai 201306, China
  • Received:2022-11-25 Published:2023-10-31 Online:2023-10-30
  • Supported by:
    National Science and Technology Major Project(J2019-III-0020-0064)

摘要:

为分析贫预混旋流燃烧室头部结构特性影响,采用计算流体力学方法研究了中心体端面形状、空气流量,燃料喷孔数量、位置,以及头部扩张比对燃烧火焰、流场及火焰动态响应的影响。结果表明:空气流速增大到一定值后, 火焰形态基本保持不变;增加压力面燃料孔数量,高放热率区集中在中心回流区根部,同时增加压力面和吸力面燃料孔数量使得中心回流区根部温度更低,有降低热力NO x 的趋势;增加火焰筒直径,有助于中心回流区沿径向扩张,导致火焰更长、更细;将中心体端面改成椭圆,会缩短火焰轴向长度;改变中心体端面形状基本不影响火焰传递函数幅值和相位,但增加燃料孔数量明显改变火焰传递函数相位。

关键词: 燃气轮机, 旋流预混燃烧室, 头部结构, 燃料孔布置, 燃烧特性, 数值模拟

Abstract:

To analyse the dome structure of the lean premixed swirled combustor, the influences of lance tip shapes, inflow air flow rates, numbers and locations of fuel nozzles and head expansion ratios on the combustion flame, flow field and flame dynamic response were investigated by computational fluid dynamics. The results show that the flame shape remains unchanged when the air velocity increases to a certain value. Increasing the number of fuel holes on the pressure surface, the high heat release rate area is concentrated in the root of the central recirculation zone. While increasing the number of fuel injectors on the pressure side and suction side makes the flame root temperature of the central recirculation zone lower, indicating a tendency to reduce the thermal NO x . Increasing the flame tube diameter helps the central recirculation zone to expand radially, resulting in longer flame branches. The axial length of flame will be shortened by changing the centre-lance tip from flat to ellipse. The amplitude and phase of flame transfer function are not affected by changing the centre-lance tip face shape, but the phase of flame transfer function is obviously changed by increasing the number of fuel holes.

Key words: gas turbine, swirled premixed combustor, dome structure, fuel nozzle configuration, combustion characteristic, numerical simulation

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