| 射流冲击换热系数的高精度热色液晶测试 |
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| 引用本文： | 张靖周,李立国.射流冲击换热系数的高精度热色液晶测试[J].中国航空学报,2001,14(4). |
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| 作者姓名： | 张靖周 李立国 |
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| 作者单位： | College of Energy and Power Engineering，Nanjing University of Aeronautics and Astronautics，Nanjing\ 210016，China |
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| 摘 要： | 采用高精度热色液晶测试技术对阵列射流冲击的冷却表面局部换热系数分布进行试验研究。研究了射流冲击间距、射流孔排列方式和初始横流等因素对换热特性的影响。热图像真实地反映出每一股射流的冲击冷却局部换热特征。热色液晶用于换热系数分布的定性和定量测试是非常有效的。
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| 关 键 词： | 液晶 射流冲击 传热 热显示 |
High-Resolution Heat Transfer Coefficients Measurement for Jet Impingement Using Thermochromic Liquid Crystals |
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| ZHANG Jing-Zhou,LI Li-Guo.High-Resolution Heat Transfer Coefficients Measurement for Jet Impingement Using Thermochromic Liquid Crystals[J].Chinese Journal of Aeronautics,2001,14(4). |
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| Authors: | ZHANG Jing-Zhou LI Li-Guo |
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| Abstract: | 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 |
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| Keywords: | liquid crystal jet impingement heat transfer thermal visualization |
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