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Effect of double rows of film holes interaction on film cooling efficiency
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Zeqin LIN1, Tao WEN2, Yuqing WANG3
Thermal Power Generation | 2024, 53(2) : 78 - 85
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Thermal Power Generation | 2024, 53(2): 78-85
• Thermal energy science research •
Effect of double rows of film holes interaction on film cooling efficiency
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Zeqin LIN1, Tao WEN2, Yuqing WANG3
Affiliations
  • 1.School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
  • 2.Electrical and Mechanical College, Guangdong Polytechnic Institute, Zhongshan 528400, China
  • 3.College of Mechanical and Vehicle Engineering, Taiyuan University of Technology, Taiyuan 030024, China
Published: 2024-02-25 doi: 10.19666/j.rlfd.202307117
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The cooling efficiency of flat film was measured using a high-precision infrared thermal imager, and the film cooling efficiency between double-cross-row holes and single row holes is compared. The interaction between film holes and the influence of blowing ratio (M=0.65, 1.0, 1.5) and density ratio (DR=1.0, 1.5) on the cooling efficiency was analyzed. Moreover, the flow field with film cooling was compared using numerical calculation methods. The results show that, with the increase of the blowing ratio, the cooling efficiency of the single row holes decreases while that of the double-cross-row holes improved greatly, but the film coverage effect at the spanwise direction deteriorates. Increasing the density ratio will improve the cooling performance. However, the influence of double rows of film holes and blow ratio is much higher on the cooling effectiveness, compared with the density ratio. For the double rows of film holes cooling, the cooling jet forms a reverse kidney-shaped vortex downstream of the holes, which will prevent the jet blowing away from the cooling wall.

turbine blade  /  film cooling  /  cooling efficiency  /  double rows of film holes  /  flow and heat transfer
Zeqin LIN, Tao WEN, Yuqing WANG. Effect of double rows of film holes interaction on film cooling efficiency[J]. Thermal Power Generation, 2024 , 53 (2) : 78 -85 . DOI: 10.19666/j.rlfd.202307117
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  • National Key Research and Development Program(2018YFE0206900)
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Year 2024 volume 53 Issue 2
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Article Info
doi: 10.19666/j.rlfd.202307117
  • Receive Date：2023-07-04
  • Online Date：2025-12-31
  • Published：2024-02-25
Article Data
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  • Received：2023-07-04
Funding
National Key Research and Development Program(2018YFE0206900)
Affiliations
    1.School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
    2.Electrical and Mechanical College, Guangdong Polytechnic Institute, Zhongshan 528400, China
    3.College of Mechanical and Vehicle Engineering, Taiyuan University of Technology, Taiyuan 030024, China
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https://castjournals.cast.org.cn/joweb/rlfd/EN/10.19666/j.rlfd.202307117
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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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