Study on the Effect of Fuel Hole Arrangement on Combustion Performance of Natural Gas Swirl Nozzle

QIU Chengxu; LIU Jiaqi; SUN Zhongwei; QIAN Yuqi; LIANG Peipei; WANG Hui

doi:10.19805/j.cnki.jcspe.2026.240731

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Study on the Effect of Fuel Hole Arrangement on Combustion Performance of Natural Gas Swirl Nozzle

更新时间：2026-10-10

- Study on the Effect of Fuel Hole Arrangement on Combustion Performance of Natural Gas Swirl Nozzle
- Chinese Journal of Power Engineering Vol. 46, Issue 2, Pages: 54-63(2026)
- 作者机构：
  
  1. 哈尔滨汽轮机厂有限责任公司,黑龙江,哈尔滨,150046
  2. 哈电发电设备国家工程研究中心有限公司,黑龙江,哈尔滨,150028
  3. 哈尔滨工业大学能源科学与工程学院,黑龙江,哈尔滨,150001
- 作者简介：
- 基金信息：
- DOI：10.19805/j.cnki.jcspe.2026.240731
  CLC：
- Online First：10 February 2026，
  
  Published：10 February 2026
- 稿件说明：
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邱成旭,刘佳琦,孙中伟,钱钰其,梁培培,王辉. 燃料孔布置方式对天然气旋流喷嘴燃烧性能影响的研究动力工程学报, 2026, 46(2): 54-63 https://doi.

org/10.19805/j.cnki.jcspe.2026.240731
邱成旭,刘佳琦,孙中伟,钱钰其,梁培培,王辉. 燃料孔布置方式对天然气旋流喷嘴燃烧性能影响的研究动力工程学报, 2026, 46(2): 54-63 https://doi. DOI： 10.19805/j.cnki.jcspe.2026.240731.

org/10.19805/j.cnki.jcspe.2026.240731 DOI：

摘要

为提高重型燃气轮机的燃烧性能及降低污染物排放

探究了燃料孔布置方式对天然气旋流喷嘴燃烧及排放特性的影响。依据叶片形状

共设计4种开孔方案

2种为布置于叶片中心

2种布置相对分散。对比4种方案在100%负荷工况下冷态燃料掺混性能及燃烧热态性能。冷态计算结果表明:当燃料孔集中布置于叶片中间位置时

其与空气混合效果较差

燃料主要集中于旋流器叶片根部区域而无法向周向分散;喷嘴出口当量比平均不均匀度可达15.19%;而分散布置方案中

其燃料掺混性能良好

喷嘴出口当量比平均不均匀度仅为1.49%。热态计算结果表明:当燃料孔集中布置时

其燃烧会产生局部高温区域

导致局部NO

排放量增加;而分散布置方案中

燃烧温度未超过1 800 K

其NO

排放量处于较低水平。综合分析得出

燃料孔应尽量分散布置

外侧孔可贴近旋流叶片外缘

而内侧孔应适当远离叶片根部。

Abstract

To enhance the combustion performance and reduce pollutant emissions of heavy-duty gas turbines

the impact of fuel hole arrangement patterns on the combustion and emission characteristics of natural gas swirl nozzles was investigated. Based on the blade shape

four hole arrangement schemes were designed in total

with two schemes featuring centralized arrangement at the center of the blades and the other two adopting a relatively dispersed arrangement. A comparison was made among the four schemes regarding corresponding cold state fuel mixing performance and combustion thermal state performance under 100% load condition. Cold state calculation results indicate that whe

n the fuel holes are concentrated in the middle of blades

the mixing effect with air is poor

with the fuel mainly concentrated in the root area of the swirler blades and unable to disperse circumferentially. The average non-uniformity of the equivalence ratio at the nozzle outlet can reach 15.19%. In contrast

for the dispersed arrangement schemes

the fuel mixing performance is good

and the average non-uniformity of the equivalence ratio at the nozzle outlet is only 1.49%. Thermal state calculation results show that when the arrangement of fuel holes is concentrated

localized high-temperature regions are generated during combustion

leading to an increase in local NO

emission. However

in dispersed arrangement schemes

the combustion temperature is no more than 1 800 K

and the NO

emissions remain at a low level. A comprehensive analysis concludes that the fuel holes should be arranged as dispersedly as possible

with the outer holes positioned close to the outer edges of the swirl blades and the inner holes appropriately distanced from the blade roots.

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references

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