Internal Heat Transfer Characteristics of Lamilloy Configurations  

带扰流柱的冲击/溢流冷却系统的换热特性研究(英文)

作　　者：孔满昭[1] 朱惠人[1] 原和朋[1] 

机构地区：[1]西北工业大学动力与能源学院,陕西西安710072

出　　处：《Chinese Journal of Aeronautics》2008年第1期28-34,共7页中国航空学报（英文版）

基　　金：National "973" Project (2007CB707700)

摘　　要：A transient measurement technique by using narrow-band thermochromic 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.A transient measurement technique by using narrow-band thermochromic 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.

关 键 词：LAMILLOY thermochromic liquid crystal （TLC） turbine blade heat transfer coefficient （HTC） 

分 类 号：TK124[动力工程及工程热物理—工程热物理]