A-6 複合型インピンジメント冷却構造に関する研究 : 内外部伝熱特性の同時計測(伝熱II,一般講演)

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This paper deals with experimental and numerical investigations on the film effectiveness and heat transfer coefficients for Transpiration Cooling System (which integrates impingement cooling and pin fin cooling devices into one body). The proposed cooling system aims at enlargement of the effective heat transfer area as well as enhancement of the internal heat transfer. One of the purposes of the present study is to clarify any different in film cooling effectiveness for two different internal cooling configurations. Large-scale test specimen, made from acrylic resin. Experiments are conducted using heated air as secondary air whose density ratio (D.R.) is about 0.87. The experimental technique involves a liquid crystal coating on the test surface. The present study is not only to determine film cooling effectiveness and heat transfer coefficient on film surface, but also to measure target plate and pin fin surface heat transfer. Numerical simulation is also executed, where ICEM-CFD mesh builder and CFX10.0 solver from ANSYS CO. are used. Flow structure inside the cooling device visualized by CFD is useful to find out a relationship between the flow field and film effectiveness or heat transfer.
公益社団法人日本ガスタービン学会の論文
2006-10-01