Heat Transfer Characteristics of Passive, Active, and Hybrid Impinging Jets: A Review
In engineering applications, there is a need to reform the excitation techniques used for jet impingement to achieve simpler, more effective thermal exchange. Jet impingement is a highly effective method for enhancing heat transfer due to its ability to create high heat transfer coefficients. Th...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Universitas Indonesia
2025-01-01
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| Series: | International Journal of Technology |
| Subjects: | |
| Online Access: | https://ijtech.eng.ui.ac.id/article/view/7255 |
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| Summary: | In
engineering applications, there is a need to reform the excitation techniques
used for jet impingement to achieve simpler, more effective thermal exchange. Jet
impingement is a highly effective method for enhancing heat transfer due to its
ability to create high heat transfer coefficients. This makes it a preferred
technique in applications requiring efficient thermal management, such as
cooling of electronic components, turbine blade cooling in jet engines, and
material processing. However, traditional excitation techniques for jet
impingement can be complex and challenging to implement. Therefore, there is a
growing interest in developing new excitation methods that are simpler and more
effective. The employed techniques can be categorized into three groups:
passive self-excited jets, active excited jets, and hybrid techniques. Passive
methods, such as annular, swirling, and sweeping jets, utilize the inherent
characteristics of the jet flow without requiring additional energy
consumption. Active systems, on the other hand, involve supplementary devices
like fans or pumps to intensify heat transfer. Examples of active excited jets
include synthetic and pulsed jets. Hybrid techniques combine two or more
methods to further thermal improvement. This paper reviews experimental and
numerical hybrid techniques to enhance heat transfer to impinged surfaces.
Experimental tools, including high-speed imaging, Particle Image Velocimetry
(PIV), and infrared thermography, are shown. Numerical simulation methods, such
as Computational Fluid Dynamics (CFD), are reviewed. The efficacy of these
methods is evaluated by comparing their performance, highlighting potential for
optimization and innovation in jet impingement heat transfer. |
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| ISSN: | 2086-9614 2087-2100 |