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Effect of dimensionless force on heat transfer of supercritical hydrogen in U-shaped tube
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Yue GAO1, Li ZHANG2, Xiao HAI1, Yang LI1, Fan YANG1, Pengfei LI1, Changshun WANG1
Thermal Power Generation | 2024, 53(12) : 68 - 76
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Thermal Power Generation | 2024, 53(12): 68-76
• Special topic of low-carbon power technology •
Effect of dimensionless force on heat transfer of supercritical hydrogen in U-shaped tube
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Yue GAO1, Li ZHANG2, Xiao HAI1, Yang LI1, Fan YANG1, Pengfei LI1, Changshun WANG1
Affiliations
  • 1.College of Petroleum Engineering, Liaoning Petrochemical University, Fushun 113001, China
  • 2.College of Mechanical Engineering, Liaoning Petrochemical University, Fushun 113001, China
Published: 2024-12-25 doi: 10.19666/j.rlfd.202404080
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Against the cooling problem of engine heat exchangers, the flow and heat transfer characteristics of hydrogen in vertical and U-shaped tubes at supercritical pressures are studied. The influence of pressure and mass flow rate on heat transfer of the pipeline is studied by numerical method, and the heat transfer law is obtained. The heat transfer mechanism of the elbow section is discussed in depth, and the effect of dimensionless force on heat transfer is analyzed. The results show that, the closer the pressure is to the quasi-critical or when the mass flow rate increases, the convective heat transfer coefficient will increase, resulting in heat transfer enhancement. The bend section of the U-shaped tube can enhance heat transfer effectively, reaching a peak near θ=90°. There is a buoyancy effect in the straight pipe section at the inlet, but when the pressure is higher than 2.0 MPa, the buoyancy effect can be ignored after the hydrogen flows through the elbow section due to the influence of density difference. The Dean vortex caused by the secondary flow is the main factor to enhance the heat transfer performance of the elbow section, and the influence on the inlet section is significantly weaker than that on the outlet section.

hydrogen  /  supercritical fluid  /  U-shaped tube  /  heat transfer characteristics  /  Dean vortex
Yue GAO, Li ZHANG, Xiao HAI, Yang LI, Fan YANG, Pengfei LI, Changshun WANG. Effect of dimensionless force on heat transfer of supercritical hydrogen in U-shaped tube[J]. Thermal Power Generation, 2024 , 53 (12) : 68 -76 . DOI: 10.19666/j.rlfd.202404080
Funding
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  • National Natural Science Foundation of China(52006094)
  • Fundamental Research Project of Liaoning Provincial Department of Education(LJKMZ20220725)
Appendix
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Year 2024 volume 53 Issue 12
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87
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Article Info
doi: 10.19666/j.rlfd.202404080
  • Receive Date：2024-04-25
  • Online Date：2026-03-06
  • Published：2024-12-25
Article Data
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History
  • Received：2024-04-25
Funding
National Natural Science Foundation of China(52006094)
Fundamental Research Project of Liaoning Provincial Department of Education(LJKMZ20220725)
Affiliations
    1.College of Petroleum Engineering, Liaoning Petrochemical University, Fushun 113001, China
    2.College of Mechanical Engineering, Liaoning Petrochemical University, Fushun 113001, China
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https://castjournals.cast.org.cn/joweb/rlfd/EN/10.19666/j.rlfd.202404080
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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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