壁面喷射当量比对支板凹腔耦合燃烧的影响

韩啸; 林宇震; 张弛; 王建臣

doi:10.13700/j.bh.1001-5965.2016.0352

壁面喷射当量比对支板凹腔耦合燃烧的影响

doi: 10.13700/j.bh.1001-5965.2016.0352

韩啸¹,
林宇震^{1, 2, ,},
张弛¹,
王建臣¹

1.
北京航空航天大学能源与动力工程学院航空发动机气动热力国家级重点实验室, 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:
韩啸, 男, 博士研究生。主要研究方向:液雾燃烧

林宇震，男，博士，教授，博士生导师。主要研究方向：航空发动机燃烧室及超声速燃烧

张弛，男，博士，副教授，硕士生导师。主要研究方向：航空发动机燃烧室及替代燃料

王建臣，男，博士。主要研究方向：超声速燃烧

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

中图分类号: V221⁺.3;TB553
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出版历程
- 收稿日期: 2016-04-28
- 录用日期: 2016-06-12
- 网络出版日期: 2017-05-20

Effect of equivalence ratio of wall injection on strut-cavity coupled combustion

1.
National Key Laboratory of Science and Technology on Aero-engine Aero-thermodynamics, 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:
在纯净空气来流条件下，对于全高后掠支板与凹腔耦合的燃烧室，采用分级喷射供油，对比研究了壁面喷射当量比对壁面压力和燃烧性能的影响。结果表明：在支板喷射当量比一定的情况下，随着壁面喷射当量比增加，壁面静压峰值升高，静压开始提升的位置向上游移动，总当量比达到1.1时发生溢流；一维分析表明，马赫数在支板附近降到1以下，在凹腔处达到0.5左右，在出口扩张段恢复至1以上，燃烧室处于亚燃模态；燃烧性能方面，保持支板喷射当量比一定，随着壁面喷射当量比的增加，总压恢复系数提高，出口总温增加，燃烧效率降低。
- 支板 /
- 凹腔 /
- 分级喷射 /
- 壁面喷射 /
- 一维分析
Abstract:
For the combustor based on full-height swept strut coupled with cavity, the experiments were conducted under clean air conditions and the inlet air was preheated by storage heater. Liquid kerosene was used as fuel and was injected by stages from the wall and strut. The effect of equivalence ratio of wall injection on the static pressure distribution and combustion performance was studied by experiments and one-dimensional analysis. The results show that as the equivalence ratio of strut was constant, with the increasing of wall injection equivalence ratio, the peak static pressure increased, and the position of the lifting of pressure was moved upward. When the total equivalence ratio reached 1.1, an inlet unstart occurred. One-dimensional analysis shows that the Mach number decreased below 1 in the strut area, then reached 0.5 in cavity and finally back to more than 1 in diverging area of outlet. The combustor worked in subsonic mode. In the combustion performance aspect, increasing of wall injection equivalence ratio ledes to increase of total pressure recovery coefficient, increase of total temperature at exit, but reduction of combustion efficiency.
- strut /
- cavity /
- staged injection /
- wall injection /
- one-dimensional analysis

HTML全文

图 1 实验系统图^[21]

Figure 1. Schematic of experimental system^[21]

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图 2 燃烧室结构简图

Figure 2. Schematic of combustor

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图 3 不同喷射当量比工况壁面压力对比

Figure 3. Comparison of wall pressure among cases with different injection equivalence ratios

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图 4 一维分析马赫数沿程分布

Figure 4. Distributions of Mach number from one-dimensional analysis along axial direction

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图 5 一维分析总温沿程分布

Figure 5. Distributions of total temperature from one-dimensional analysis along axial direction

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图 6 一维分析静温沿程分布

Figure 6. Distributions of static temperature from one-dimensional analysis along axial direction

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图 7 一维分析总压沿程分布

Figure 7. Distributions of total pressure from one-dimensionalanalysis along axial direction

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表 1 实验工况

Table 1. Experimental operation conditions

工况	壁面喷射当量比	支板喷射当量比	总当量比
1	0.12	0.70	0.82
2	0.20	0.70	0.90
3	0.30	0.70	1.00
4	0.12	0.80	0.92
5	0.20	0.80	1.00
6	0.30	0.80	1.10

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表 2 不同工况燃烧性能参数

Table 2. Combustion characteristic parameters under different operation conditions

工况	总压恢复系数/%	出口总温/K	燃烧效率/%
1	48.3	2033.92	69.4
2	48.9	2100.31	69.0
3	50.5	2121.43	64.5
4	48.4	2089.50	67.1
5	50.1	2128.63	65.1

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