Effects of Gas Film Hole on Mechanical Property and Oxidative Damage of Turbine Blades

Abstract:

With the development of aero-engine with high specific flux, high thrus-weight ratio, and high turbine inlet temperature, it is an effective way to improve the cooling efficiency by designing dense gas film holes on the blade surface of the turbine blades, especially at the intake side. However, the introduction of gas film holes destroys the geometrical integrity of the blade structure, resulting in a multiaxial high stress state of the blade material around the small holes, which seriously affects the strength and life of the cooling blades. In addition, the geometry design of the gas film holes also directly affects the temperature and the oxidation rate of the turbine rotor blades. In this paper, the researches on the mechanical properties and oxidative damage of the gas film holes at home and abroad in recent years have been systematically introduced. The effects of gas film holes on the durability and fatigue properties, the high temperature oxidation behavior of single crystal superalloys, and the thin-walled effect of oxidative damage of gas film holes have been systematically described.

• Periodical: Materials Science Forum (Volume 944)
• Pages: 421-425
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.944.421
• Online since: January 2019
• Authors: Chun Yan Hu, Zhi Qiang Kong, Xin Ling Liu, Chun Hu Tao
• Keywords: Gas Film Hole, Mechanical Properties, Oxidative Damage, Thin-Wall Effect, Turbine Blade

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