| 脉冲流冲击冷却换热的液晶显示实验研究 |
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| 引用本文： | 李发军,苑中显,马重芳,吴宗善,卢伟,周志远.脉冲流冲击冷却换热的液晶显示实验研究[J].工程热物理学报,2002,23(2):193-196. |
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| 作者姓名： | 李发军 苑中显 马重芳 吴宗善 卢伟 周志远 |
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| 作者单位： | 1. 北京工业大学环境与能源工程学院,北京 ,100022
2. 航天工业总公司北京空气动力研究所,北京 ,100074 |
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| 基金项目： | 国家自然科学基金，国家重点基础研究发展计划(973计划)，59776010，G2000026304，， |
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| 摘 要： | 采用热色液晶定量测温技术对稳态及脉冲式空气-氮气圆形浸没射流冲击冷却换热进行了实验研究.脉冲射流的实验结果表明,对于喷嘴直径D=3 mm的情形,无论脉冲频率高低,均无强化换热效果;对于D=I0 mm的情形,在较高Re数时出现个别工况的驻点换热强化.脉冲射流表现出换热系数沿径向分布趋于均匀的特点.
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| 关 键 词： | 液晶显示 脉冲 射流冲击 传热 |
| 文章编号： | 0253-231X(2002)02-0193-04 |
| 修稿时间： | 2001年1月8日 |
EXPERIMENTAL STUDY OF INTERMITTENT IMPINGING JET HEAT TRANSFER WITH LIQUID CRYSTAL TECHNIQUE |
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| LI Fa-Jun, YUAN Zhong-Xian, MA Chong-Fang, WU Zong-Shan LU Wei, ZHOU Zhi-Yuan.EXPERIMENTAL STUDY OF INTERMITTENT IMPINGING JET HEAT TRANSFER WITH LIQUID CRYSTAL TECHNIQUE[J].Journal of Engineering Thermophysics,2002,23(2):193-196. |
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| Authors: | LI Fa-Jun YUAN Zhong-Xian MA Chong-Fang WU Zong-Shan LU Wei ZHOU Zhi-Yuan |
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| Abstract: | The heat transfer of intermittent nitrogen jet submerged in the air has been experimentally studied with liquid crystal displaying technique. The results revealed that the enhancement of heat transfer can not be obtained using a nozzle of D=3 mm. But when a nozzle of D = 10 mm is employed the enhancement heat transfer in the region of the stagnation point really occurred when the Reynolds number is large enough. Another notable characteristic of this kind configuration is that the distribution of the heat transfer coefficient is more even than that without intermittence. |
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| Keywords: | liquid crystal technique intermittent impinging jet heat transfer |
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