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非能动余热排出换热器强化换热实验研究

Research & Design of Nuclear Engineering(2017)

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Abstract
本文结合非能动余热排出换热器运行环境,对比分析光管和微肋管的实验体在管内冷凝、管外大容积沸腾工况下的换热性能,并分析了管束效应对沸腾换热的影响和螺旋微肋对冷凝换热的影响.发现在实验范围内,微肋管束的冷凝换热系数是光管的1.1~1.2倍,且随着雷诺数的增加强化倍数逐渐增大.微肋管的管外沸腾换热系数是光管的1.3~1.6倍,且随着热流密度的增加强化倍数逐渐降低.
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