带有曲率的双层壁冷却结构内部换热特性

于松琦; 由儒全; 刘润洲; 李海旺; 鹿泽伦

doi:10.13224/j.cnki.jasp.20250450

带有曲率的双层壁冷却结构内部换热特性

doi: 10.13224/j.cnki.jasp.20250450

于松琦^{1, 2,},
由儒全^{1, 2},
刘润洲^3,*, ,,
李海旺^{1, 2, 3},
鹿泽伦⁴

1.
北京航空航天大学航空发动机研究院，北京 102206
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 102206
3.
太行国家实验室，成都 610000
4.
陆军装备部驻株洲地区某军事代表室，湖南株洲 412000

基金项目: 国家自然科学基金面上项目（52376042）；国家自然科学基金（52225602）；四川省科技计划（2026NSFSC1210）；中国博士后科学基金（2025M780853）

详细信息

作者简介:
于松琦（2002-），男，博士生，主要从事涡轮叶片冷却研究。E-mail：yusongqi_buaa@163.com

通讯作者:
刘润洲（1997-），男，博士后，主要从事涡轮叶片冷却研究。E-mail：liurunzhou_buaa@163.com

中图分类号: V231.1
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出版历程
- 收稿日期: 2025-09-30
- 网络出版日期: 2026-05-16

Internal heat transfer characteristics in curved double-wall laminate cooling structures

Yu Songqi^{1, 2
,},
You Ruquan^{1, 2},
Liu Runzhou^{3,*
, ,},
Li Haiwang^{1, 2, 3},
Lu Zelun⁴

1.
Research Institute of Aero-Engine，Beihang University，Beijing 102206，China
2.
National Key Laboratory of Science and Technology on Aero-Engine Thermodynamics，Beihang University，Beijing 102206，China
3.
Taihang National Laboratory，Chengdu 610000，China
4.
Military Representative Office of the Army Equipment Department，Zhuzhou Hunan 412000，China

摘要

摘要:
采用瞬态液晶测量技术，通过实验定量分析了带冲击孔、扰流柱和狭缝的复杂双层壁结构靶面的换热情况与曲率（9°凹面、30°凸面和75°凸面）和冲击雷诺数（10000～40000）的关系。研究发现，随着曲率增大，双层壁结构内部换热得到增强，在相同冲击雷诺数下，75°凸面的平均表面传热系数比9°凹面高出约20 W/（m²·K）。冲击雷诺数每升高10000，3种曲率结构的平均表面传热系数升高约30 W/（m²·K），仅当冲击雷诺数从30000升高到40000时，平均表面传热系数的增长变小。表面传热系数在展向上呈多峰分布，当雷诺数达到40000时，次峰数值超过主峰。表面传热系数沿流向整体呈下降趋势，在流向的不同位置处呈现不同的分布规律。
- 双层壁 /
- 曲率 /
- 冲击雷诺数 /
- 内部换热 /
- 瞬态液晶
Abstract:
This study employed the transient liquid crystal method to experimentally quantify the heat transfer on the target surface of a complex double-wall structure incorporating impingement hole, pin-fins, and slot. The investigation focuses on the effects of curvature (9° concave, 30° convex, and 75° convex) and impingement Reynolds numbers (10000—40000). The results demonstrate that as curvature increases, internal heat transfer within the double-wall structure is enhanced. At identical impingement Reynolds numbers, the average convective heat transfer coefficient for 75° convex is approximately 20 W/(m²·K) higher than that of 9° concave. For every increase of 10000 in the impingement Reynolds number, the area-averaged convective heat transfer coefficient rises by about 30 W/(m²·K) across all three curved structures. The increase in the average convective heat transfer coefficient slows down only when the impingement Reynolds number rises from 30000 to 40000. The spanwise distribution of the convective heat transfer coefficient exhibits multiple peaks, with secondary peaks surpassing the primary peak at Reynolds number of 40000. Along the flow direction, the convective heat transfer coefficient generally decreases but displays distinct distribution patterns at different longitudinal positions.
- double-wall /
- curvature /
- impingement Reynolds number /
- internal heat transfer /
- transient liquid crystal

HTML

图 1 双层壁结构示意图

Figure 1. Geometrical configuration of double-wall structure

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图 2 基于涡轮叶片曲率的弯曲双层壁

Figure 2. Curved double-wall structures based on turbine blade curvature

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图 3 实验装置

Figure 3. Experimental setup

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图 4 实验系统

Figure 4. Experimental system

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图 5 瞬态液晶标定曲线

Figure 5. Transient liquid crystal calibration result

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图 6 弯曲双层壁结构靶面表面传热系数分布

Figure 6. Contours of h at target surface of curved double-wall structure

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图 7 面平均表面传热系数

Figure 7. Area-averaged heat transfer coefficient

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图 8 平均表面传热系数计算区域

Figure 8. Calculation region of averaged heat transfer coefficient

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图 9 展向平均表面传热系数

Figure 9. Spanwise-averaged heat transfer coefficient

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图 10 流向平均表面传热系数

Figure 10. Flow direction averaged heat transfer coefficient

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表 1 结构参数设计

Table 1. Configuration of double-wall structure mm

参数	数值	参数	数值
L₁	36.34	P	14
L₂	11	R₁	5
L₃	11	R₂	3
L₄	3	R₃	9.68
L₅	26	R₄	2
L₆	5	R₅	3
L₇	6	R₆	5
L₈	11	R₇	4.5
L₉	103.9	R₈	2
L₁₀	112	D	13
L₁₁	10	α₁/（°）	35
L₁₂	17.46	α₂/（°）	95
L₁₃	10.74	S^*	5
L₁₄	19.79

下载: 导出CSV

表 2 各参数不确定度表

Table 2. Uncertainty of various parameters

参数		数值	不确定度
T₀/K		293.15	±0.2
T_h/K		333.15	±0.2
T_lc/K		302.46	±0.2
$ \lambda /\sqrt{\alpha } （\text{W}\sqrt{\text{s}}/ （{\text{m}}^{2}\cdot\text{K}）） $		554.96	±22.3
低换热	t/s	20	±0.1
低换热	h/（W/（m²·K））	30	8.15%
高换热	t /s	2	±0.1
高换热	h/（W/（m²·K））	240	12.42%

下载: 导出CSV

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