| 循环系统中闪蒸换热特性的实验研究 |
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| 引用本文： | 李鲁宁,胡申华,严俊杰,刘继平.循环系统中闪蒸换热特性的实验研究[J].工程热物理学报,2007,28(3):439-441. |
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| 作者姓名： | 李鲁宁 胡申华 严俊杰 刘继平 |
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| 作者单位： | 1. 西安交通大学动力工程多相流国家重点实验室,陕西,西安,710049
2. 新疆大学电气工程学院,新疆,乌鲁木齐,830008 |
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| 基金项目： | 国家自然科学基金
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教育部跨世纪优秀人才培养计划 |
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| 摘 要： | 本文针对循环系统中闪蒸的换热特性进行了实验研究,通过可视化系统对闪蒸形态进行了记录和分析,并得出了换热系数与各影响参数之间关系的实验关联式.实验结果表明:当循环水流量为0.028kg/s时,随着过热度的增大,换热系数变化较小,而循环水流量为0.056 kg/s和0.083 kg/s时,换热系数随过热度的增大而减小;同时发现换热系数随水膜厚度的增大而减小.可视化分析表明,闪蒸形态随闪蒸室内饱和压力的减小而变剧烈,闪蒸换热系数随之减小.
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| 关 键 词： | 闪蒸 换热系数 过热度 |
| 文章编号： | 0253-231X(2007)03-0439-03 |
| 修稿时间： | 2006年11月27 |
EXPERIMENTAL STUDY ON HEAT TRANSFER CHARACTERISTICS OF FLASH EVAPORATION IN CYCLE SYSTEM |
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| LI Lu-Ning,HU Shen-Hua,YAN Jun-Jie,LIU Ji-Ping.EXPERIMENTAL STUDY ON HEAT TRANSFER CHARACTERISTICS OF FLASH EVAPORATION IN CYCLE SYSTEM[J].Journal of Engineering Thermophysics,2007,28(3):439-441. |
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| Authors: | LI Lu-Ning HU Shen-Hua YAN Jun-Jie LIU Ji-Ping |
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| Abstract: | Heat transfer characteristics of flash evaporation in cycle system were studied.Flash evaporation behavior was recorded and analyzed.Moreover,an experimental expression of heat transfer coefficient with all of the influence parameters was presented.The results showed that heat transfer coefficient varied weakly with the increase of superheat when mass flux was 0.028 kg/s;while the mass flux was 0.056,0.083 kg/s,heat transfer coefficient decreased with the increase of superheat and water film thickness respectively.According to observation,flash evaporation behavior became severe with the decrease of saturated pressure and heat transfer coefficient declined subsequently. |
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| Keywords: | flash evaporation heat transfer coefficient superheat |
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