대한기계학회논문집B (Transactions of the Korean Society of Mechanical Engineers B)

  • 제26권8호
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  • Pages.1077-1087
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  • 2002
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  • 1226-4881(pISSN)
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  • 2288-5324(eISSN)
대한기계학회 (The Korean Society of Mechanical Engineers)
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큰 회전각을 가지는 터빈 블레이드 표면에서 나프탈렌승화법을 이용한 열(물질)전달계수 측정

Measurements of Heat (Mass) Transfer Coefficient on the Surface of a Turbine Blade with n High Turning Angle Using Naphthalene Sublimation Technique

  • 발행 : 2002.08.01
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초록

The heat (mass) transfer characteristics on the blade surface of a high-turning first-stage turbine rotor for power generation has been investigated by employing the naphthalene sublimation technique. A four-axis profile measurement system is developed successfully for the measurements of local sublimation depth on the curved surface In the leading edge region, there is a good agreement between the present heat (mass) transfer data and the previous result on a turbine blade with a moderate turning angle, but some discrepancies are found in the mid-chord heat (mass) transfer between the two results. The local heat (mass) transfer on the present suction surface is greatly enhanced due to an earlier boundary transition, compared with that on a turbine blade with a moderate turning angle, meanwhile there is only a slight change in the pressure-side heat (mass) transfer between the two different turbine rotors. In general, the heat (mass) transfer augmentation by the endwall vortices is found much higher on the suction surface than on the pressure surface.

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참고문헌

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