In recent years, steam is used in vane internal cooling ducts as a new coolant to replace compressed air. Much research has been carried out into the closed circuit steam cooling for vanes. But most of the existing literatures only provide information on the overall cooling effect of vanes. The effects of steam parameters on the cooling effectiveness of the vane internal channel are still not very clear. A steam heat transfer enhancement test platform of turbine blade (vane) internal channel at Equipment Cooling Technology Laboratory, Xi’an Jiaotong University was built to study the steam cooling characteristics in blade (vane) internal cooling channel. In this paper, heat transfer data of a steam-cooled duct have been experimentally obtained under different operating conditions. The range of key governing parameters is presented as follows: Reynolds numbers based on the channel hydraulic diameter (10000–60000), entry absolute pressures (0.3Mpa–0.6Mpa), heat flux of heat transfer surface area (5.5kWm−2−22kWm−2), steam superheat (0K–40K). The results show that the average Nusselt numbers along the centerline of the ribbed wall of the steam-cooled square duct are about 15 percent higher than that of air, but the overall heat transfer characteristics of steam in the square duct are similar to that of air under the same conditions.
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ASME 2011 Turbo Expo: Turbine Technical Conference and Exposition
June 6–10, 2011
Vancouver, British Columbia, Canada
Conference Sponsors:
- International Gas Turbine Institute
ISBN:
978-0-7918-5465-5
PROCEEDINGS PAPER
An Experimental Investigation of Heat Transfer Characteristics in a Steam-Cooled Square Channel With Rib Turbulators
Jiazeng Liu,
Jiazeng Liu
Xi’an Jiaotong University, Xi’an, Shaanxi, China
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Jianmin Gao,
Jianmin Gao
Xi’an Jiaotong University, Xi’an, Shaanxi, China
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Tieyu Gao
Tieyu Gao
Xi’an Jiaotong University, Xi’an, Shaanxi, China
Search for other works by this author on:
Jiazeng Liu
Xi’an Jiaotong University, Xi’an, Shaanxi, China
Jianmin Gao
Xi’an Jiaotong University, Xi’an, Shaanxi, China
Tieyu Gao
Xi’an Jiaotong University, Xi’an, Shaanxi, China
Paper No:
GT2011-46134, pp. 1529-1534; 6 pages
Published Online:
May 3, 2012
Citation
Liu, J, Gao, J, & Gao, T. "An Experimental Investigation of Heat Transfer Characteristics in a Steam-Cooled Square Channel With Rib Turbulators." Proceedings of the ASME 2011 Turbo Expo: Turbine Technical Conference and Exposition. Volume 5: Heat Transfer, Parts A and B. Vancouver, British Columbia, Canada. June 6–10, 2011. pp. 1529-1534. ASME. https://doi.org/10.1115/GT2011-46134
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