仮想タービンにおける熱応力解析のインターフェース構築及び応力評価

概要

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In order to construct a database of structural strength for a virtual turbine made of single crystal Ni-base superalloy, an interface and a stress evaluation system were proposed. Then the thermal stress and its properties of the 1400℃ virtual turbine vane were analyzed based on this interface and the stress evaluation system. As the results, (1) the constructed interface with the quasi-three dimensional interpolation by resolution of plane coordinates and interpolation in two dimensions is of both the simplicity of calculation and wider use, and high precise. (2) It was shown that there existed the maximum Von Mises stress at the fillet between the trailing edge and the end wall in the 1400℃ class turbine vanes. This is caused by the large curvatures and then the easy stress concentration in these areas. (3) In the evaluation system, the evaluation parameters were visualized and the distributions corresponding to the multi objectives of stress evaluation were made clear. Thus it is indicated that the present stress evaluation system is effective one for the structural strength database of the virtual turbine.
社団法人日本ガスタービン学会の論文
2004-01-20