An experimental study on convective heat transfer performance of steam and air flow in V-shaped rib roughened channels |
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| Authors: | Chao Ma Yongbin Ji Shusheng Zang Hua Chen |
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| Institution: | 1. Marine engineering college, Dalian Maritime University, Dalian, P. R. China;2. School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, P. R. China |
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| Abstract: | An experimental study on heat transfer characteristics of steam and air flows in a V-shaped ribbed channels was conducted. The effects of Reynolds numbers and rib angles on heat transfer of steam and air were obtained. The area-averaged Nusselt numbers of steam flow at a Reynolds number of 12,000 were 13.9%, 20.6%, 27.1%, and 27.9% higher than those of air flow for rib angles of 90°, 75°, 60°, and 45°, respectively. The correlations for Nusselt number in terms of Reynolds number and rib angle for steam and air in V-shaped ribbed channels were developed. |
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| Keywords: | Steam cooling air cooling V-shaped ribbed channel gas turbine heat transfer |
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