High-Resolution Heat Transfer Coefficients Measurement for Jet Impingement Using Thermochromic Liquid Crystals  

射流冲击换热系数的高精度热色液晶测试(英文)

作　　者：张靖周 李立国 

出　　处：《Chinese Journal of Aeronautics》2001年第4期205-209,共5页中国航空学报（英文版）

摘　　要：A high-resolution testing technique named liquid crystal thermography is used for the experimental study on jet array impingement to map out the distribution of heat transfer coefficients on the cooling surface. Effects of the impingement distance, the impinging hole arrangement and the initial crossflow on heat transfer characteristics are investigated. The thermal images show truly the features of local heat transfer for each jet impingement cooling. The applications of thermochromic liquid crystal are successful in the qualitative and quantitative measurement for heat transfer coefficients distribution.A high-resolution testing technique named liquid crystal thermography is used for the experimental study on jet array impingement to map out the distribution of heat transfer coefficients on the cooling surface. Effects of the impingement distance, the impinging hole arrangement and the initial crossflow on heat transfer characteristics are investigated. The thermal images show truly the features of local heat transfer for each jet impingement cooling. The applications of thermochromic liquid crystal are successful in the qualitative and quantitative measurement for heat transfer coefficients distribution.

关 键 词：COOLING Flow visualization Heat transfer coefficients Jets Liquid crystals Thermography (imaging) 

分 类 号：V231.1[航空宇航科学与技术—航空宇航推进理论与工程] V231.2