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The Influence of Turbulence on Subcooled Nucleate Pool Boiling
International Journal of Heat and Mass Transfer ( IF 5.2 ) Pub Date : 2021-02-01 , DOI: 10.1016/j.ijheatmasstransfer.2020.120694
Li Chang , Ali S. Rangwala

Abstract Experiments are performed to study the influence of turbulence (root-mean-square velocity, urms = 0 m/s, 0.013 m/s, 0.026 m/s and 0.038 m/s) on nucleate boiling heat transfer using thin nichrome wires within dodecane layer. Nucleate boiling curves under each turbulent condition are analyzed with corresponding bubble behaviors on the wire. Overall, the heat transfer is enhanced with the increase of turbulence, which is supported by measurements and analysis of bubble departure frequency (BDF), critical heat flux (CHF), and bubble departure size. BDF increases with turbulence strength, while bubble departure size decreases. CHF is increased by 6%. Turbulence also alters the bubble behaviors: sweeping stage, bouncing and merging stage, hanging stage, and film boiling stage show unique bubble behaviors influencing the heat transfer characteristics.

中文翻译:

湍流对过冷核池沸腾的影响

摘要 通过实验研究湍流(均方根速度,urms = 0 m/s、0.013 m/s、0.026 m/s 和 0.038 m/s)对使用细镍铬合金丝内的核沸腾传热的影响。十二烷层。分析了每种湍流条件下的核沸腾曲线以及在线材上相应的气泡行为。总体而言,热传递随着湍流的增加而增强,这得到了气泡脱离频率 (BDF)、临界热通量 (CHF) 和气泡脱离尺寸的测量和分析的支持。BDF随着湍流强度增加,而气泡离开尺寸减小。瑞士法郎增加 6%。湍流也会改变气泡的行为:清扫阶段、弹跳和合并阶段、悬挂阶段、
更新日期:2021-02-01
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