预燃级旋流数对TeLESSⅡ燃烧室贫油熄火性能影响

肖荣洪; 林宇震; 张弛

doi:10.13700/j.bh.1001-5965.2017.0392

预燃级旋流数对TeLESSⅡ燃烧室贫油熄火性能影响

doi: 10.13700/j.bh.1001-5965.2017.0392

肖荣洪¹,
林宇震^{1, 2, ,},
张弛^{1, 2}

1.
北京航空航天大学能源与动力工程学院, 北京 100083
2.
先进航空发动机协同创新中心, 北京 100083

详细信息

作者简介:
肖荣洪男, 硕士研究生。主要研究方向:航空发动机燃烧性能

林宇震男, 博士, 教授, 博士生导师。主要研究方向:航空发动机燃烧室前沿理论及技术

通讯作者:
林宇震, E-mail:linyuzhen@buaa.edu.cn

中图分类号: V231.2
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出版历程
- 收稿日期: 2017-06-12
- 录用日期: 2017-10-20
- 网络出版日期: 2018-06-20

Effect of swirl number of pilot stage on TeLESS Ⅱ combustor's lean blow-out performance

XIAO Ronghong¹,
LIN Yuzhen^{1, 2
, ,},
ZHANG Chi^{1, 2}

1.
School of Energy and Power Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China
2.
Collaborative Innovation Center for Advanced Aero-Engine, Beijing 100083, China

More Information

Corresponding author: LIN Yuzhen, E-mail:linyuzhen@buaa.edu.cn

摘要

摘要:
北京航空航天大学发展的TeLESSⅡ低排放燃烧室采用中心分级的布局方式，其中心为经典的旋流杯结构预燃级，为燃烧室提供稳定的点火源，预燃级外圈采用预混设计的单级轴向旋流器的主燃级以降低排放。研究了预燃级一级旋流器和二级旋流器的旋流数组合对燃烧室熄火性能的影响，研究表明预燃级的设计在中心分级低排放燃烧室火焰稳定中扮演重要角色。在常温常压条件下的单头部燃烧室上测量贫油熄火油气比，并通过数值计算对比分析不同方案在熄火时的气动热力特征。研究表明：回流区总温越高燃烧室贫油熄火油气比越低，二级旋流数减少有利于火焰和流场的耦合，从而提高回流区火焰稳定，拓宽贫油熄火边界。一级旋流数增加贫油熄火油气比不是随之降低。
- 中心分级燃烧室 /
- 预燃级 /
- 旋流数 /
- 旋流杯 /
- 贫油熄火
Abstract:
The next generation of technology of low emission of stirred swirl (TeLESSⅡ)low-emission combustor developed by Beihang University adopted a central staged arrangement. The center of the dome was classic swirl cup pilot structure which could provide a stable ignition source for the combustor. The main stage arranged outer of the pilot stage which adopted a pre-mixed single axial cyclone design was used to reduce emission. The influence of the combination of the swirl number of the pilot first stage and the secondary stage on the blow-out performance of the combustor was studied. The pilot stage is found playing an important role in the stabilization of flame in low-emission combustor. The gas-oil ratio was measured in the single dome combustor under normal temperature and pressure conditions. The aerodynamic characteristics of different cases were analyzed by numerical calculation. The results show that the higher the total temperature in the recirculation zone is, the lower the gas-oil ratio for lean blow-out is, and the decrease of pilot secondary stage's swirl number isfavorable to the coupling between the flame and flow field. Therefore, the flame in the recirculation zone is more stable and the lean blow-out boundary becomes broader. With the increase of the pilot first stage's swirl number, the gas-oil ratio for lean blow-out is not reduced.
- central staged combustor /
- pilot stage /
- swirl number /
- swirl cup /
- lean blow-out

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图 1 头部试验件结构

Figure 1. Structure of test piece dome

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图 2 贫油熄火试验系统

Figure 2. Test system of lean blow-out

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图 3 试验中油气比随时间变化

Figure 3. Change of gas-oil ratio in test with time

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图 4 方案1~方案3贫油熄火边界

Figure 4. Boundary line of lean blow-out for Case1 to Case3

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图 5 方案1~方案5中心截面温度云图

Figure 5. Center section temperature contours for Case1 to Case5

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图 6 方案1~方案5中心截面流线和温度云图

Figure 6. Center section streamline and temperature contours for Case1 to Case5

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图 7 方案1~方案5三维回流区温度云图

Figure 7. 3D recirculation zone temperature contours for Case1 to Case5

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图 8 方案1、方案3和方案5沿程回流量

Figure 8. Recirculation air along flow channel for Case1, Case3 and Case5

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图 9 方案1、方案2和方案4沿程回流量

Figure 9. Recirculation air along flow channel for Case1, Case2 and Case4

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表 1 各方案设计参数

Table 1. Design parameters of each case

方案	预燃级一级旋流数	预燃级二级旋流数
方案1	0.4	0.8
方案2	0.4	0.6
方案3	0.6	0.8
方案4	0.4	0.4
方案5	0.8	0.8

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表 2 回流区体积和总温

Table 2. Recirculation zone volume and total temperature

方案	压降/ %	回流区体积/m³	流体域体积/m³	回流区占流体域比例/%	回流区平均总温/K
方案1	2	0.473 0	2.996 3	15.79	1 656.608
方案2	2	0.261 7	2.996 3	8.73	1 769.055
方案3	2	0.253 1	2.996 3	8.45	1 774.167
方案4	2	0.243 1	2.996 3	8.11	1 781.759
方案5	2	0.291 1	2.996 3	9.71	1 726.936
方案1	3	0.436 2	2.996 3	14.56	1 594.235
方案2	3	0.241 3	2.996 3	8.05	1 720.237
方案3	3	0.224 2	2.996 3	7.48	1 758.021
方案4	3	0.220 7	2.996 3	7.37	1 752.239
方案5	3	0.271 0	2.996 3	9.04	1 680.236
方案1	4	0.339 3	2.996 3	11.32	1 566.672
方案2	4	0.212 9	2.996 3	7.11	1 684.975
方案3	4	0.196 1	2.996 3	6.54	1 702.293
方案4	4	0.193 6	2.996 3	6.46	1 714.822
方案5	4	0.255 9	2.996 3	8.54	1 635.813

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