Recent Advances in the Study of High Efficiency Novel Film Cooling Holes

Abstract:

The development of a new generation of high performance aircraft turbine jet engine desires gas turbines to be operated at very high rotor inlet gas temperatures. This brings a problem on the effective cooling of turbine blades. Up to now, modified film cooling is still an effective cooling technique. The influence of air-film hole structures on the air-film cooling efficiency cant be ignored. A survey of the research results concerning novel air-film cooling hole about home and abroad were given and high efficiency crescent air-film hole geometry was put forward. Through a comparative study of film cooling characteristic with cylindrical air-film hole and forward diffused air-film hole and crescent air-film hole found effectiveness of the crescent air-film hole was superior to other air-film holes in various blowing ratios. The crescent air-film hole could greatly reduce the kidney vortex intensity, and then enhanced the air-film cooling effectiveness.

• Periodical: Advanced Materials Research (Volume 740)
• Pages: 830-835
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.740.830
• Online since: August 2013
• Authors: Ping Dai, Nai Yun Yu
• Keywords: Cooling Effectiveness, Crescent Hole, Film Cooling, Novel Hole, Turbine Blade

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