旋流器气量分配对全环燃烧室排放的影响

王志凯; 龚卡; 罗莲军; 张险; 陈盛; 范玮

doi:10.13224/j.cnki.jasp.20230156

旋流器气量分配对全环燃烧室排放的影响

doi: 10.13224/j.cnki.jasp.20230156

王志凯^{1, 2,},
龚卡¹,
罗莲军¹,
张险¹,
陈盛¹,
范玮²

1.
中国航发湖南动力机械研究所，湖南株洲 412002
2.
西北工业大学动力与能源学院，西安 710129

详细信息

作者简介:
王志凯（1989-），男，高级工程师，博士生，研究领域为航空发动机燃烧室设计。E-mail：nhwzk12@126.com

中图分类号: V231.1
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出版历程
- 收稿日期: 2023-03-14
- 网络出版日期: 2023-09-28

Effects of swirler airflow split on emissions of full annular combustor

1.
Hunan Aviation Powerplant Research Institute， Aero Engine Corporation of China，Zhuzhou Hunan 412002，China
2.
School of Power and Energy，Northwestern Polytechnical University， Xi’an 710129，China

摘要

摘要:
为研究一、二级旋流器气量分配对燃烧室排放性能的影响，在总气量恒定条件下，针对配装气量比分别为0.85和1.1两种方案双级轴向旋流器的全环燃烧室开展了地面慢车、空中慢车和起飞状态下的排放试验。结果表明：气量比从0.85增加到1.1，空中慢车和起飞状态氮氧化物（NOx）排放分别降低33%～52%和14%～38%，地面慢车状态CO和未燃碳氢（UHC）排放分别降低23%～49%和32%～36%。地面慢车状态两方案旋流器对应的NOx排放差异不大，且排放值均较低。CO和UHC排放主要集中在地面慢车状态，随着状态增大，CO和UHC排放量逐渐降低，且空中慢车和起飞状态对应的CO和UHC排放量差异不大。在本文试验范围内，全环燃烧室CO排放指数随着NOx排放指数的增加呈现幂函数下降，随着UHC排放指数的增加呈现对数上升。
- 燃烧室 /
- 双级旋流器 /
- 气量分配 /
- 排放性能 /
- 试验
Abstract:
To study the effects of swirler airflow split on the combustor emission characteristics, experimental investigations were conducted on the full annular combustor of dual-axial swirler with airflow ratio of 0.85 and 1.1, respectively, under the ground idle, flight idle and take off conditions. The experimental results indicated that when the airflow ratio increased from 0.85 to 1.1, NOx of flight idle and take off conditions was reduced by 33%−52% and 14%−38%, respectively, while CO and unburned hydrocarbon (UHC) of ground idle were reduced by 23%−49% and 32%−36%. NOx of ground idle for the two cases of swirlers had little difference, and the emission values were both low. CO and UHC emissions were mainly concentrated in the condition of ground idle, and the emission of CO and UHC gradually decreased with the increase of the state, and there was little difference in the emissions of CO and UHC between the two schemes. Within the test range, the CO emission index of the full annular combustor presented a power function decline with the increase of NOx emission index, and a logarithmic increase with the increase of UHC emission index.
- combustor /
- dual swirler /
- airflow split /
- emission performance /
- experiment

HTML

图 1 双级轴向旋流器示意图

Figure 1. Schematic of dual-axial swirler

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图 2 试验系统示意图

1、2、3 阀门；4、6 标准流量喷嘴；5 电加温器；7 全环试验件；8 蝶阀；9 换热器；10 消声塔。

Figure 2. Schematic of experimental system

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图 3 进口截面测点分布

Figure 3. Test points of inlet section

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图 4 出口截面测点分布

Figure 4. Test points of outlet section

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图 5 总压损失特性曲线

Figure 5. Character curve of total pressure loss

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图 6 NOx排放对比

Figure 6. Comparison of NOxemission

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图 7 CO排放对比

Figure 7. Comparison of CO emission

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图 8 UHC排放对比

Figure 8. Comparison of UHC emission

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图 9 NOx的排放指数和CO的排放指数的关系

Figure 9. Relationship between emission indexes of NOx and CO

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图 10 UHC的排放指数和CO的排放指数的关系

Figure 10. Relationship between emission indexes of UHCand CO

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图 11 油气比对比验证

Figure 11. Comparison and validation of fuel air ratio

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表 1 试验工况

Table 1. Test conditions

工况油气比

地面慢车 0.01，0.015
空中慢车 0.014，0.02，0.025
起飞 0.015，0.02，0.025

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表 2 参数测试精度

Table 2. Parameters measurement accuracy

参数测试精度

$\dot m_{\rm{a3}}$/（kg/s） ±1%
$\dot m_{{\rm{f}}} $/（kg/s） ±0.5%
p_t3/MPa ±0.5%
p_t4/MPa ±0.5%
T_t3/K ±1.5 K
T_t4/K ±1.5 K

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