受限式阵列射流冲击传热的试验和数值研究

李勇; 张劲; 张迎春; 张嘉杰; 马素霞; 谢公南

doi:10.21656/1000-0887.460047

受限式阵列射流冲击传热的试验和数值研究

doi: 10.21656/1000-0887.460047

李勇^{1, 2, ,},
张劲^1,,
张迎春³,
张嘉杰^{1, 2},
马素霞¹,
谢公南⁴

1.
太原理工大学电气与动力工程学院, 太原 030024
2.
煤电清洁智能控制教育部重点实验室, 太原 030024
3.
中北大学能源与动力工程学院, 太原 030051
4.
西北工业大学航海学院, 西安 710129

(我刊青年编委李勇、编委谢公南来稿)

基金项目:

山西省基础研究计划青年基金 202203021212263

山西省回国留学人员科研资助项目 2023-055

山西省回国留学人员科研资助项目 2023-143

教育部“春晖计划”合作科研项目 202200075

详细信息

作者简介:
张劲(2000—)，男，硕士生(E-mail: 2023520639@link.tyut.edu.cn)

通讯作者:
李勇(1987—)，男，讲师，硕士生导师(通讯作者. E-mail: yongli@tyut.edu.cn)

中图分类号: O35
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- HTML全文浏览量: 23
- PDF下载量: 38
- 被引次数: 0
出版历程
- 收稿日期: 2025-03-11
- 修回日期: 2025-04-10
- 刊出日期: 2025-10-01

Experimental and Numerical Study of Impingement Heat Transfer in Confined Array Jets

LI Yong^{1, 2
, ,},
ZHANG Jin^1
,,
ZHANG Yingchun³,
ZHANG Jiajie^{1, 2},
MA Suxia¹,
XIE Gongnan⁴

1.
College of Electrical and Power Engineering, Taiyuan University of Technology, Taiyuan 030024, P.R.China
2.
Key Laboratory of Cleaner Intelligent Control on Coal & Electricity, Ministry of Education, Taiyuan 030024, P.R.China
3.
School of Energy and Power Engineering, North University of China, Taiyuan 030051, P.R.China
4.
School of Marine Science and Technology, Northwestern Polytechnical University, Xi'an 710129, P.R.China

(Contributed by LI Yong, M.AMM Youth Editorial Board & XIE Gongnan, M.AMM Editorial Board)

摘要

摘要: 阵列射流是提高微型通道或狭小空间内传热性能的有效方法.借助试验研究和数值仿真方法，从靶面温度分布、流场信息和全局Nusselt数等角度，探究了射流高度/射流间距(Z/d_j=0.60~1.67)这一无量纲参数对多股射流冲击流动传热的影响规律.结果表明：当射流孔数目为奇数时，流体之间的相互作用力越发平衡；当总流量不变时，射流孔数目越少，冷却效果越好；当射流间距较小时，射流会出现明显偏移.随着射流间距的增大，流动结构的对称性逐渐恢复，射流之间的相互作用减弱，受热面温度分布和流体速度分布更加均匀.多股射流的流动传热性能受Z和d_j的共同影响，Z/d_j对2个和3个射流孔下Nusselt数分布影响差异性较小，其中Z/d_j值分别为1.67和1.25时Nusselt数达到峰值.该文的研究结论有助于优化多股射流结构，进一步提升多股射流的换热性能.
- 狭小空间 /
- 射流冲击 /
- 强化传热 /
- 射流高度/射流间距 /
- Nusselt数
Abstract: Array jet impingement is an effective method to enhance heat transfer performance in microchannels or confined spaces. The effects of dimensionless parameters of jet height/jet distance (Z/d_j=0.60~1.67) on the heat transfer of multi-jet impinging flow were investigated from the perspectives of the target surface temperature distribution, the flow field information and the global Nusselt number by experiment and numerical simulation. The results show that, the interaction force between the fluids becomes more balanced with an odd number of jet holes. At a constant total flow rate, fewer jet holes lead to better cooling performance. The jet has obvious deviation with relatively smaller jet spacings. The symmetry of the flow structure will gradually recover with the increase of the jet spacing, the interaction between jets will weaken, and the temperature distribution on the heating surface and the fluid velocity distribution will become more uniform. The flow and heat transfer performances of multiple jets are jointly affected by Z and d_j, and Z/d_j has little difference in Nusselt number distributions for 2 and 3 jet holes, where the Nusselt number reaches its peak for Z/d_j=1.67 and 1.25, respectively. The findings contribute to optimizing multiple jets' configurations and further enhancing their heat transfer performances.
- narrow space /
- jet impingement /
- heat transfer enhancement /
- jet height/jet distance /
- Nusselt number
edited-by

edited-by
注释:

1) (我刊青年编委李勇、编委谢公南来稿)

HTML全文

图 1 圆形孔射流冲击的流动结构图

Figure 1. The flow structure diagram of the circular hole jet impingement

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图 2 不同射流高度和间距下多股射流冲击几何模型

Figure 2. The geometric model of multi-jet impingement at different jet heights and spacings

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图 3 射流孔分布的相对位置

Figure 3. The distribution and relative positions of jet holes

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图 4 射流冷却通道的网格划分

Figure 4. Grid discretization of the jet cooling channel

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图 5 射流冷却通道试验测试系统原理图

Figure 5. Schematic diagram of the experimental test system for the jet cooling channel

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图 6 数值模拟与试验数据的比较

Figure 6. Comparison of relevant data between numerical simulation and experiment

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图 7 两股射流下靶面的温度分布

注为了解释图中的颜色，读者可以参考本文的电子网页版本，后同.

Figure 7. Target surface temperature distributions in the condition with 2 jets

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图 8 三股射流下靶面的温度分布

Figure 8. Target surface temperature distributions in the condition with 3 jets

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图 9 两股射流的流线和速度分布

Figure 9. Streamline and velocity distributions in the condition with 2 jets

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图 10 三股射流的流线和速度分布

Figure 10. Streamline and velocity distributions in the condition with 3 jets

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图 11 Re=145 346下加热面沿y轴的Nusselt数分布

Figure 11. Nusselt number distributions along the y axis for a heating surface with Re=145 346

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图 12 不同Z/d_j下加热面的平均Nusselt数

Figure 12. The average Nusselt numbers on the heating surface at various Z/d_j values

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表 1 研究工况详细信息

Table 1. Details in all study conditions

number of jets	the spacing between the jets/mm	the height of the jet to the target/mm	inlet temperature/K	outlet pressure/Pa	Z/d_j	case number
2	6	10	300	101 325	0.60	1
2	6	8	300	101 325	0.75	2
2	8	10	300	101 325	0.80	3
2	6	6	300	101 325	1.00	4
2	8	8	300	101 325	1.00	5
2	10	10	300	101 325	1.00	6
2	10	8	300	101 325	1.25	7
2	8	6	300	101 325	1.33	8
2	10	6	300	101 325	1.67	9
3	6	10	300	101 325	0.60	10
3	6	8	300	101 325	0.75	11
3	8	10	300	101 325	0.80	12
3	6	6	300	101 325	1.00	13
3	8	8	300	101 325	1.00	14
3	10	10	300	101 325	1.00	15
3	10	8	300	101 325	1.25	16
3	8	6	300	101 325	1.33	17
3	10	6	300	101 325	1.67	18

下载: 导出CSV

表 2 不同网格数下case 1数值模拟结果

Table 2. Numerical results of case 1 based on different mesh numbers

number of elements	temperature and velocity of outlet 1	deviation	temperature and velocity of outlet 2	deviation
698 248	323.88 K, 5.585 m/s	0.12%, 0.56%	325.44 K, 5.526 m/s	0.05%, 0.56%
1 968 136	323.94 K, 5.581 m/s	0.10%, 0.48%	325.49 K, 5.531 m/s	0.03%, 0.47%
3 702 816	324.27 K, 5.554 m/s	baseline	325.59 K, 5.557 m/s	baseline

下载: 导出CSV

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