リブ付き内部流路によるガスタービン冷却動翼の連成伝熱解析(熱工学,内燃機関,動力など)

概要

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The present paper reports on numerical prediction of temperature distribution of the rotor blade in a gas turbine, which has ribbed serpentine passages for internal cooling. The three-dimensional numerical analysis was conducted by thermal conjugation of inside and outside fields of the blade, which consists of convection heat transfer around the blade, thermal conduction in the blade material and internal cooling. Correlations of heat and mass transfer in ribbed channels were applied to evaluate heat transfer rate of the internal cooling. The predicted blade temperature profile for the rating condition coincides with the distinctive features of damage on an actual blade. And that profile is in agreement with local temperature estimated by destructive test of the blade. Moreover, the conjugate calculation demonstrates transitional variations in the blade temperature, which are essential for life evaluation of the blade, and clarifies the thermal behaviors of the blade in start-up and shutdown processes.
一般社団法人日本機械学会の論文
2007-03-25