Internal Heat Transfer Characteristics of Lamilloy Configurations

A transient measurement technique by using narrow-band thermoehromic liquid crystal (TLC) is employed to determine temperature and heat transfer coefficient (HTC) distribution on inner surfaces of the typical lamilloy configurations. With this technique, both local HTC distribution and average HTC distribution could be obtained. The experimental results indicate that the variation of the porosity ratio, the one that the area of impingement holes divided by that of the plate, has a great effect on the HTC distribution on the inner surfaces. Heat exchange of inner surfaces varies directly as the porosity ratio. The impingement Reynolds number ranges from 20 000 to 50 000. The average HTC of inner surfaces bears a linear relationship with the Reynolds number.

作 者： Kong Manzhao Zhu Huiren Liu Songling Yuan Hepeng   作者單位： School of Power and Energy, Northwestern Polytechnical University, Xi'an, 710072, China  刊 名： 中國航空學報（英文版）  ISTIC 英文刊名： CHINESE JOURNAL OF AERONAUTICS  年，卷(期)： 2008 21(1)  分類號： V2  關鍵詞： lamilloy   thermochromic liquid crystal(TLC)   turbine blade   heat transfer coefficient(HTC)  

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