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

LI Yong; ZHANG Jin; ZHANG Yingchun; ZHANG Jiajie; MA Suxia; XIE Gongnan

doi:10.21656/1000-0887.460047

Volume 46 Issue 10

Oct. 2025

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Article Navigation > Applied Mathematics and Mechanics > 2025 > 46(10): 1233-1244

LI Yong, ZHANG Jin, ZHANG Yingchun, ZHANG Jiajie, MA Suxia, XIE Gongnan. Experimental and Numerical Study of Impingement Heat Transfer in Confined Array Jets[J]. Applied Mathematics and Mechanics, 2025, 46(10): 1233-1244. doi: 10.21656/1000-0887.460047

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

doi: 10.21656/1000-0887.460047

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

Received Date: 2025-03-11
Rev Recd Date: 2025-04-10

Available Online: 2025-11-13

Abstract

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

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References(17)

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