G0600-3-1 連成伝熱解析によるガスタービン第1段静翼の温度推定(熱工学部門一般講演(3):伝熱(3))

概要

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First stage nozzle vane of gas turbine are exposed to severe high temperature combustion gas environment, which causes fatigue cracking on the nozzle surfaces. Since welding repair is one of the impacting factors to costly maintenance strategy of gas turbine, an appropriate method to predict crack propagation is desired to develop. This study describes an attempt to estimate temperature distribution by steady-state conjugate heat transfer analysis. Temperature distribution was compared with the results of previous heat conduction analysis, which was performed under thermal conditions determined by micro-structural observation and hardness distribution of a disposed nozzle vane. The temperature distribution estimated here qualitatively agreed with the previous one and was found to be useful for understanding of crack propagation mechanism.
一般社団法人日本機械学会の論文
2010-09-04