IGTC-60 Measurements of Heat Transfer around Turbine Blades Using Boundary Element Method and Uncertainty Analysis (Part I)(Session B-5 BLADE HEAT TRANSFER AND HEAT EXCHANGER)

概要

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A numerical technique using Boundary Element Method (BEM) is proposed for the purpose of calculation of heat transfer coefficients on turbine blades, where constant elements or linear elements are used. In both cases thermal boundary conditions for BEM analysis are temperature distributions on the hot-side blade surface and then heat transfer coefficients and coolant temperatures on the internal cooling-side boundaries, which are both experimental values. Detailed check on the numerical accuracy are made for some simple test cases and as a result it is found out that BEM using linear elements produces better results than BEM using constant elements. But when the latter is applied to a turbine blade case, the results almost agree with those of previous FEM analysis. But linear elements bring about a little difference from FEM. Due to rather conflicting results, there arise great necessities for further investigations.
公益社団法人日本ガスタービン学会の論文