高温强旋流中单股与多股横向射流的流动与掺混特征研究

方政喆; 张弛; 刘舆帅; 王柏森; 高天衡; 刘存喜; 徐纲

doi:10.13224/j.cnki.jasp.20240559

高温强旋流中单股与多股横向射流的流动与掺混特征研究

doi: 10.13224/j.cnki.jasp.20240559

方政喆^{1, 2,},
张弛^{1, 2,*, ,},
刘舆帅³,
王柏森^{1, 2},
高天衡³,
刘存喜³,
徐纲³

1.
北京航空航天大学航空发动机研究院，北京 100191
2.
北京航空航天大学航空发动机气动热力国家级重点实验室，北京 100191
3.
中国科学院工程热物理研究所，北京 100190

基金项目: 国家科技重大专项（J2019-Ⅲ-0014-0057）

详细信息

作者简介:
方政喆（1994-），男，工程师，博士生，主要从事航空发动机燃烧室掺混研究。E-mail：fangzhengzhe_stu@buaa.edu.cn

通讯作者:
张弛（1979-），男，研究员、博士生导师，博士，主要从事航空发动机低排放燃烧研究。E-mail：zhangchi@buaa.edu.cn

中图分类号: V231.2
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出版历程
- 收稿日期: 2024-08-09
- 网络出版日期: 2026-04-05

Research on flow and dilution characteristics of single and multiple jets in high-temperature and strong swirling crossflow

Fang Zhengzhe^{1, 2
,},
Zhang Chi^{1, 2,*
, ,},
Liu Yushuai³,
Wang Bosen^{1, 2},
Gao Tianheng³,
Liu Cunxi³,
Xu Gang³

1.
Research Institute of Aero-Engine，Beihang University，Beijing 100191，China
2.
National Key Laboratory of Science and Technology on Aero-Engine Thermodynamics，Beihang University，Beijing 100191，China
3.
Institute of Engineering Thermophysics，Chinese Academy of Sciences，Beijing 100190，China

摘要

摘要:
为提高先进航空发动机燃烧室出口温度分布品质，需要探明在强旋流燃气中非等温横向射流的流动与掺混特性。针对强旋流中的高温差单股与多股横向射流，基于双色法甲基萘激光诱导荧光技术测量了横向射流掺混过程的温度场，同时采用大涡模拟获取其三维温度场与速度场，进而揭示横向射流的流动与掺混机制。结果表明：在高温强旋流中横向射流会跟随旋流倾斜，在下游形成二次低温区，旋流的脉动也会加强横向射流掺混的非定常特征。孤立的单股射流在流向截面中表现出近似直线的倾斜，穿透深度更大；而多股射流则出现背风侧弯曲现象，其掺混效果弱于单股射流。大涡模拟结果显示了多股射流对旋流切向速度有明显的阻挡作用，导致多股横向射流的切向作用力与切向剪切层减弱，这是多股射流掺混较弱的关键原因。
- 燃烧室 /
- 掺混射流 /
- 平面激光诱导荧光（PLIF） /
- 大涡模拟（LES） /
- 旋流主流下横向射流
Abstract:
To enhance the quality of the exit temperature distribution from advanced combustors, it is necessary to investigate the flow and dilution characteristics of non-isothermal jets in strong swirling crossflow. In this study, two-color 1-methylnaphthalene planar laser-induced fluorescence (1-MN PLIF) thermometer technology was used to investigate the temperature distributions of single and multiple jets in strong swirling crossflow with high temperature difference. Meanwhile, large eddy simulation (LES) was employed to obtain the three-dimensional temperature and velocity fields, thereby revealing the flow and dilution mechanisms of jet in swirling crossflow. The results indicated that the low temperature jet inclined in swirling crossflow and generated a secondary low temperature zone downstream of the mainstream; the fluctuations of the swirling mainstream also intensified the jet's unsteady characteristics with distinct mode due to the jet/mainstream velocity ratio and the hole diameter. A single jet showed a nearly straight inclination in the streamwise cross-sections, whereas the multiple jets tended to be twisted to the swirl leeward side of the jets, with a lower degree of dilution than the single jet. The LES results showed that the multiple jets significantly impeded the tangential velocity of the swirling mainstream, leading to a reduction in the tangential force and tangential shear layer of the multiple transverse jets. This phenomenon was mainly attributed to the weaker dilution performance of multiple jets.
- combustor /
- dilution jet /
- planar laser-induced fluorescence (PLIF) /
- large eddy simulation (LES) /
- jet in swirling crossflow

HTML

图 1 试验系统图

Figure 1. Sketch of the experimental rig

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图 2 1-MN PLIF标定系统图与温度标定曲线

Figure 2. Sketch of the 1-MN PLIF laser induced fluorescence calibration rig and temperature calibration curve

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图 3 计算域示意图以及射流孔与旋流器网格局部放大

Figure 3. Schematic view of the computational domain and a partial zoom in grids of jet hole and swirler

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图 4 旋流下横向射流网格无关性验证

Figure 4. Grid independence verification for jet in swirling crossflow

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图 5 旋流下单股横向射流x-y中心截面时均温度分布

Figure 5. Central plane （x-y plane） mean temperature distributions of single jet in swirling crossflow

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图 6 旋流下单股横向射流x-y中心截面射流核心面积概率密度分布

Figure 6. Central plane （x-y plane） PDF of jet potential core area in the single jet in swirling crossflow

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图 7 单股射流与三股射流中间射流展向截面（x/d=0 截面）瞬态温度分布

Figure 7. Spanwise instantaneous temperature distributions （x/d=0 plane） for the single jet and the middle one of triple jet

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图 8 不同速度比的单股射流与三股射流中间射流展向截面（x/d=0 截面）时均温度分布

Figure 8. Spanwise mean temperature distributions （x/d=0 plane） for the single jet and the middle one of triple jet at different velocity ratio

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图 9 不同速度比的单股射流与三股射流中间射流截面时均温度分布

Figure 9. Normal mean temperature curves for the single jet and the middle one of triple jet at different velocity ratio

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图 10 旋流下单股横向射流x-y中心截面时均切向速度分布与流线

Figure 10. Central plane （x-y plane） mean tangential velocity distributions and streamtraces of single jet in swirling crossflow

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图 11 x/d=0截面的单股射流与三股射流中间射流时均切向速度分布

Figure 11. Mean tangential velocity distributions at the x/d=0 plane for the single jet and the middle one of triple jet from LES

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图 12 三股射流展向截面时均流线图（x/d=−2, 0, 2截面，云图颜色为无量纲温度）

Figure 12. Spanwise plane averaged streamtraces of triple jet (x/d=−2, 0, 2 planes from LES, colored by dimensionless scalar $\langle \widetilde{\theta }\rangle $)

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图 13 x/d=0平面单股与三股中间射流温度标准差与湍动能分布云图

Figure 13. Temperature standard deviation and turbulent kinetic energy distributions （x/d=0 plane） for the single jet and the middle one of triple jet

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表 1 试验与模拟工况

Table 1. Operating conditions and case setup

工况	M_j/（kg/h）	d/m	Re	V_r	J_r	N
1	8.8	0.0074	23508	3.0	16.5	1
2	13.2	0.0074	35262	4.4	35.5	1
3	18.4	0.0107	33994	3.0	16.5	1
4	27.5	0.0107	50807	4.4	35.5	1
5	32.1	0.014	45903	3.0	16.5	1
6	47.1	0.014	67324	4.4	35.5	1
7	26.4	0.0074	23508	3.0	16.5	3
8	39.6	0.0074	35262	4.4	35.5	3

下载: 导出CSV

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