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터빈 블레이드 후연부 사다리꼴 채널 내 내부 축소 홀 설치에 따른 열전달 특성
허정훈(Jeonghun Heo),김태현(Taehyun Kim),박희승(Hee Seung Park),송호섭(Ho Seop Song),이창용(Changyong Lee),조형희(Hyung Hee Cho) 대한기계학회 2021 대한기계학회 춘추학술대회 Vol.2021 No.11
The gas turbine has been a widely used engine system in aircraft and powerplants. Due to the high turbine inlet temperature, diverse turbine cooling techniques have been developed. In this study, the trailing edge trapezoidal channel is designed, and the 45 degrees of rib turbulators and inner hole are also installed. The naphthalene sublimation experiment is conducted to analyze heat transfer characteristics. As a result of the experiment, heat transfer is higher when the inner hole is installed. Also, the heat transfer of the mid-hole case was higher than the inlet hole case, so the heat transfer increment by the jet effect is confirmed. Therefore, it can be considered to install the inner hole in the trailing edge channel.