Numerical investigation of heat transfer enhancement via dimpled target surface configuration and jet arrangement in impingement cooling
This research employs numerical simulation to investigate the influence of dimple configurations on heat transfer. Specifically, it focuses on the 3x3 array of jets directed at a dimpled target surface. The study explores various jet pitches (P = 3D_j, 4D_j and 5D_j) and distances between jets and t...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Aeronautical and Astronautical Society of the Republic of China, Taiwan
2024
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| Online Access: | http://psasir.upm.edu.my/id/eprint/110993/ http://psasir.upm.edu.my/id/eprint/110993/1/2024%20Fitri%20JoAAA%20paper%201.pdf |
| _version_ | 1848865568423149568 |
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| author | Mohd Zulkeple, Muhammad Fitri Abu Talib, Abd Rahim Harmin, Mohammad Yazdi Saadon, Syamimi Azami, Muhammad Hanafi Yusaf, Talal |
| author_facet | Mohd Zulkeple, Muhammad Fitri Abu Talib, Abd Rahim Harmin, Mohammad Yazdi Saadon, Syamimi Azami, Muhammad Hanafi Yusaf, Talal |
| author_sort | Mohd Zulkeple, Muhammad Fitri |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | This research employs numerical simulation to investigate the influence of dimple configurations on heat transfer. Specifically, it focuses on the 3x3 array of jets directed at a dimpled target surface. The study explores various jet pitches (P = 3D_j, 4D_j and 5D_j) and distances between jets and the dimpled surface (H = 3D_j, 4D_j and 5D_j). Additionally, dimple designs were altered while keeping their volume constant, resulting in elongated dimples. This investigation comprehensively examines flow patterns and heat transfer properties across Reynolds number (Re) range of 5,000 to 15,000. Increasing the H/D_j ratio from 4 to 5 enlarges entrainment vortices near the target surface due to reduced cross flow intensity between adjacent jets. Conversely, reducing the ratio to 3 intensifies crossflow, delaying cooling jet detachment and enhancing heat transfer. Evaluating the smallest jet-to-jet pitch (P_x = 3D_j) reveals enhanced heat transfer to the target surface, driven by increased coolant mass flow rate per unit area compared to larger jet pitches (P_x = 4D_j and P_x = 5D_j). When altering dimple depths while maintaining constant volume, Nusselt numbers (Nu) showed improvements ranging from 10% to 16%, surpassing the 6% to 14% increase seen with hemisphere dimples. |
| first_indexed | 2025-11-15T14:06:47Z |
| format | Article |
| id | upm-110993 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T14:06:47Z |
| publishDate | 2024 |
| publisher | Aeronautical and Astronautical Society of the Republic of China, Taiwan |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-1109932024-04-18T07:20:31Z http://psasir.upm.edu.my/id/eprint/110993/ Numerical investigation of heat transfer enhancement via dimpled target surface configuration and jet arrangement in impingement cooling Mohd Zulkeple, Muhammad Fitri Abu Talib, Abd Rahim Harmin, Mohammad Yazdi Saadon, Syamimi Azami, Muhammad Hanafi Yusaf, Talal This research employs numerical simulation to investigate the influence of dimple configurations on heat transfer. Specifically, it focuses on the 3x3 array of jets directed at a dimpled target surface. The study explores various jet pitches (P = 3D_j, 4D_j and 5D_j) and distances between jets and the dimpled surface (H = 3D_j, 4D_j and 5D_j). Additionally, dimple designs were altered while keeping their volume constant, resulting in elongated dimples. This investigation comprehensively examines flow patterns and heat transfer properties across Reynolds number (Re) range of 5,000 to 15,000. Increasing the H/D_j ratio from 4 to 5 enlarges entrainment vortices near the target surface due to reduced cross flow intensity between adjacent jets. Conversely, reducing the ratio to 3 intensifies crossflow, delaying cooling jet detachment and enhancing heat transfer. Evaluating the smallest jet-to-jet pitch (P_x = 3D_j) reveals enhanced heat transfer to the target surface, driven by increased coolant mass flow rate per unit area compared to larger jet pitches (P_x = 4D_j and P_x = 5D_j). When altering dimple depths while maintaining constant volume, Nusselt numbers (Nu) showed improvements ranging from 10% to 16%, surpassing the 6% to 14% increase seen with hemisphere dimples. Aeronautical and Astronautical Society of the Republic of China, Taiwan 2024 Article PeerReviewed text en http://psasir.upm.edu.my/id/eprint/110993/1/2024%20Fitri%20JoAAA%20paper%201.pdf Mohd Zulkeple, Muhammad Fitri and Abu Talib, Abd Rahim and Harmin, Mohammad Yazdi and Saadon, Syamimi and Azami, Muhammad Hanafi and Yusaf, Talal (2024) Numerical investigation of heat transfer enhancement via dimpled target surface configuration and jet arrangement in impingement cooling. Journal of Aeronautics, Astronautics and Aviation, 56 (1). pp. 93-106. ISSN 1990-7710 https://www.airitilibrary.com/Article/Detail/P20140627004-N202403020027-00003 10.6125/JoAAA.202403_56(1S).02 |
| spellingShingle | Mohd Zulkeple, Muhammad Fitri Abu Talib, Abd Rahim Harmin, Mohammad Yazdi Saadon, Syamimi Azami, Muhammad Hanafi Yusaf, Talal Numerical investigation of heat transfer enhancement via dimpled target surface configuration and jet arrangement in impingement cooling |
| title | Numerical investigation of heat transfer enhancement via dimpled target surface configuration and jet arrangement in impingement cooling |
| title_full | Numerical investigation of heat transfer enhancement via dimpled target surface configuration and jet arrangement in impingement cooling |
| title_fullStr | Numerical investigation of heat transfer enhancement via dimpled target surface configuration and jet arrangement in impingement cooling |
| title_full_unstemmed | Numerical investigation of heat transfer enhancement via dimpled target surface configuration and jet arrangement in impingement cooling |
| title_short | Numerical investigation of heat transfer enhancement via dimpled target surface configuration and jet arrangement in impingement cooling |
| title_sort | numerical investigation of heat transfer enhancement via dimpled target surface configuration and jet arrangement in impingement cooling |
| url | http://psasir.upm.edu.my/id/eprint/110993/ http://psasir.upm.edu.my/id/eprint/110993/ http://psasir.upm.edu.my/id/eprint/110993/ http://psasir.upm.edu.my/id/eprint/110993/1/2024%20Fitri%20JoAAA%20paper%201.pdf |