複合型インピンジ冷却構造の研究(ガスタービン技術の最先端 : 伝熱・燃焼,ガスタービン技術の最先端)

概要

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For a turbine cooling air reduction, an integrated impingement and pin fin cooling configuration was developed. This configuration integrated impingement cooling and pin fin cooling devices into one body, aiming at an enhancement of the effective heat transfer area. Not only a cooling performance improvement but also an establishment of manufacturing process and keeping sufficient strength and life are the subjects of this research. A staggered type cooling configuration was designed to get better cooling performance in manufacturing limitations. A cooling performance test was conducted, and it was confirmed that a heat conductance enhancement factor for a cooling air side surface of a staggered type specimen was 1.2-1.3. And the staggered type gave superior cooling performance over the conventional type that had no pin, for given pressure drop. An actual size staggered type specimen was successfully manufactured. A fatigue test was also conducted, and it was confirmed that there was no higher stress concentration in a staggered type specimen than that in a conventional type specimen.
社団法人日本機械学会の論文
2004-09-04