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Heat Transfer and Flow Characteristics of Annular Inner Ribbed Convex Tubes
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Zhi-miao LI1, Xin-ling ZHANG1, *, Yuan LI1, Hua ZHOU2, Yan-hui QIU2
Science Technology and Engineering | 2025, 25(20) : 8498 - 8507
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Science Technology and Engineering | 2025, 25(20): 8498-8507
• Papers·Energy and Power Engineering •
Heat Transfer and Flow Characteristics of Annular Inner Ribbed Convex Tubes
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Zhi-miao LI1, Xin-ling ZHANG1, *, Yuan LI1, Hua ZHOU2, Yan-hui QIU2
Affiliations
  • 1 School of Mechanical Science and Engineering, Northeast Petroleum University, Daqing 163318, China
  • 2 Xinglongtai Oil Production Plant of Liaohe Oilfield Company of China National Petroleum and Natural Gas Corporation, Panjin 124011, China
Published: 2025-07-18 doi: 10.12404/j.issn.1671-1815.2404307
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To enhance heat transfer efficiency and improve thermal exchange performance, a composite enhanced thermal exchange technology was explored that combined annular internal fins with protruding units, aiming to create an innovative thermal exchange structure. Through numerical simulation methods, the flow and heat transfer characteristics of this structure were studied within the Reynolds number Re range is 8 000~20 000. The analysis results indicate that the layout of the protruding units and four parameters (depth, radius, spacing, and quantity) have a significant impact on thermal performance. The mechanism of enhanced heat transfer was explained using field synergy theory. Under optimal parameters, with a depth of 2 mm, a radius of a specific value, a spacing of 20 mm, and six protruding units, the best thermal exchange performance is achieved, with an overall heat transfer performance improvement of 4.71%~23.59% compared to internal finned tubes. Increasing depth, radius, and quantity, while decreasing spacing, enhances heat transfer but also increases resistance, limiting the growth of overall thermal performance. Field synergy analysis shows that the structure promotes strong secondary vortices, significantly enhancing the synergy effect between the velocity field and the temperature field.

internal ribbed tube  /  heat transfer enhancement  /  comprehensive heat transfer performance  /  numerical simulation  /  field synergy
Zhi-miao LI, Xin-ling ZHANG, Yuan LI, Hua ZHOU, Yan-hui QIU. Heat Transfer and Flow Characteristics of Annular Inner Ribbed Convex Tubes[J]. Science Technology and Engineering, 2025 , 25 (20) : 8498 -8507 . DOI: 10.12404/j.issn.1671-1815.2404307
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Year 2025 volume 25 Issue 20
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Article Info
doi: 10.12404/j.issn.1671-1815.2404307
  • Receive Date：2024-06-11
  • Online Date：2026-05-13
  • Published：2025-07-18
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History
  • Received：2024-06-11
  • Revised：2025-04-09
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Affiliations
    1 School of Mechanical Science and Engineering, Northeast Petroleum University, Daqing 163318, China
    2 Xinglongtai Oil Production Plant of Liaohe Oilfield Company of China National Petroleum and Natural Gas Corporation, Panjin 124011, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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