多股流S弯喷管红外辐射特性研究

徐建宇; 周莉; 是介; 孟钰博; 史经纬; 王占学

doi:10.13224/j.cnki.jasp.20230148

多股流S弯喷管红外辐射特性研究

doi: 10.13224/j.cnki.jasp.20230148

徐建宇¹,
周莉^{1, 2,*, ,},
是介¹,
孟钰博¹,
史经纬^{1, 2},
王占学^{1, 2}

1.
西北工业大学动力与能源学院，西安 710072
2.
先进航空发动机协同创新中心，北京 100191

基金项目: 国家自然科学基金（52376032，52076180）；陕西省杰出青年科学基金（2021JC-10）；国家科技重大专项（J2019-Ⅱ-0015-0036）；航空发动机及燃气轮机基础科学中心项目（P2022-B-Ⅰ-002-001，P2022-B-Ⅱ-010-001）；中央高校基本科研业务费专项资金(501XTCX2023146001)

详细信息

作者简介:
徐建宇（1998-），男，博士生，主要从事高超声速飞行器红外辐射研究

通讯作者:
周莉（1978-），女，教授、博士生导师，博士，研究领域为排气系统设计及流动控制技术。E-mail：zhouli@nwpu.edu.cn

中图分类号: V231
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- 被引次数: 0
出版历程
- 收稿日期: 2023-03-13
- 网络出版日期: 2024-09-16

Investigation on infrared radiation characteristics of multi-stream serpentine nozzle

XU Jianyu¹,
ZHOU Li^{1, 2,*
, ,},
SHI Jie¹,
MENG Yubo¹,
SHI Jingwei^{1, 2},
WANG Zhanxue^{1, 2}

1.
School of Power and Energy，Northwestern Polytechnical University，Xi’an 710072，China
2.
Collaborative Innovation Center for Advanced Aero-Engine，Beijing 100191，China

摘要

摘要:
针对自适应发动机用多S弯喷管，通过数值模拟的方法研究了在设计工况及非设计工况下红外辐射强度的空间分布特征，分析了红外辐射特征产生机理及影响因素。结果表明：在设计工况下，由于主流形状弯曲造成内流出口上壁面产生热斑，使得垂直探测面负探测角度壁面红外辐射强度占总辐射最高达54%；在其他探测角度下燃气红外辐射强度为主要辐射来源，喷管内部燃气辐射强度显著高于喷流辐射强度。在非设计工况下，壁面红外辐射强度基本不变；落压比增加导致喷管内部燃气压力与出口波系发生变化，造成喷管内部燃气红外辐射强度增强，喷流红外辐射强度减弱。燃气红外辐射强度受到内部燃气和喷流的共同影响。
- 自适应发动机 /
- 多股流S弯喷管 /
- 离散传递法 /
- 红外辐射特征 /
- 落压比
Abstract:
A numerical simulation was carried out to investigate the spatial distribution characteristics of infrared radiation intensity of a multi-stream serpentine nozzle for an adaptive engine under both design and off-design conditions. The underlying mechanisms and influencing factors of the IR radiation characteristics were comprehensively analyzed. The results revealed that under design conditions, the curvature of the mainstream shape caused a hot spot to form on the upper wall of the nozzle outlet, resulting in the wall infrared radiation intensity accounting for up to 54% of the total radiation at a negative detection angle on the vertical plane. The gas infrared radiation intensity was identified as the main source of radiation at other angles, and the gas radiation intensity within the nozzle was significantly higher than that of the plume radiation intensity. Under off-design conditions, the wall infrared radiation intensity remained relatively constant. An increase in the pressure ratio led to changes in the internal gas pressure and exit shock waves shape of the nozzle, resulting in an enhanced gas infrared radiation intensity within the nozzle, and a weakened plume infrared radiation intensity. The gas infrared radiation intensity was jointly affected by internal gas and plume radiations.
- adaptive engine /
- multi-stream serpentine nozzle /
- discrete transfer method /
- infrared radiation characteristics /
- pressure ratio

HTML

图 1 多股流S弯喷管模型

Figure 1. Model of multi-stream serpentine nozzle

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图 2 计算网格及边界条件

Figure 2. Numerical grid and boundary conditions

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图 3 网格无相关性验证

Figure 3. Result of grid independent

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图 4 窄谱带模型与逐线计算法对比

Figure 4. Comparison between SNB and LBL

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图 5 固体壁面m的辐射亮度示意图

Figure 5. Illustration of luminance of solid wall m

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图 6 探测点及探测面布置示意图

Figure 6. Schematic diagram of probe points and planes

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图 7 多股流S弯喷管红外辐射强度分布

Figure 7. Infrared radiation intensity of TISN on two probe plane

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图 8 喷管对称面压力与温度分布

Figure 8. Static pressure and temperature distribution of nozzle section

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图 9 喷管主流壁面温度分布

Figure 9. Wall temperature distribution of nozzle mainstream

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图 10 垂直探测面可见区域温度分布随探测角度变化

Figure 10. Temperature distribution of visible nozzle wall on vertical plane with different angles

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图 11 垂直探测面正探测角度测点可视喷管壁面区域

Figure 11. Visible area of nozzle wall on vertical plane with positive angle

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图 12 垂直探测面燃气吸收距离随探测角度变化

Figure 12. Gas absorption distance distribution with different angles on vertical plane

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图 13 垂直探测面上核心流投影面积随探测角度变化

Figure 13. Core plume area with different angles on vertical plane

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图 14 喷管内部高温气流可探测区域示意图

Figure 14. Schematic diagram of internal high temperature gas visible area of nozzle

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图 15 水平探测面可见区域温度分布随探测角变化

Figure 15. Temperature distribution of visible nozzle wall on horizontal plane with different angles

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图 16 水平探测面燃气吸收距离随探测角度变化

Figure 16. Gas absorption distance distribution with different angles on horizontal plane

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图 17 垂直探测面不同NPR红外辐射特性分布

Figure 17. Infrared radiation intensity on vertical plane with different NPRs

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图 18 不同NPR水平探测面红外辐射强度分布

Figure 18. Infrared radiation intensity on horizontal plane with different NPRs

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图 19 喷管沿程截面气流温度分布

Figure 19. Gas temperature distribution along the nozzle section

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图 20 不同NPR下出口燃气温度分布

Figure 20. Section diagram of gas temperature distribution with different NPRs

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图 21 不同NPR下CO₂摩尔分数分布

Figure 21. CO₂ mole fraction distribution with different NPRs

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图 22 不同NPR下喷管出口密度梯度分布

Figure 22. Density gradient distribution of nozzle outlet with different NPRs

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图 23 不同NPR下α=20°喷管内部压力分布

Figure 23. Pressure distribution of nozzle of α=20° with different NPRs

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