A-21 高圧空冷タービン翼の軽量化に関する研究(空力IV,一般講演)

概要

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Despite great success in the development of highly-loaded airfoils for low pressure (LP) turbines, vanes and blades for high-pressure turbines (HPTs) are still thick and heavy, mainly because of their internal cooling structure to protect them from the hostile environments. This study is the very first attempt to seek a possibility of any drastic weight reduction of air-cooled HPT blades. The cross-section of the tested turbine blade in this study is developed by scooping out some part of the pressure side of the original turbine. Pneumatic probe measurements then reveal aerodynamic characteristics of the linear cascade of the "scooped-out" blades with no cooling structure, aiming at clarification of the feasibility of the blades from the viewpoint of the associated aerodynamic penalty. Numerical simulation is also executed to provide some ideas on aerodynamic as well as heat transfer characteristics of the scooped-out blades.
公益社団法人日本ガスタービン学会の論文
2006-10-01