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首页> 外文期刊>Experimental Thermal and Fluid Science: International Journal of Experimental Heat Transfer, Thermodynamics, and Fluid Mechanics >Two-phase pressure drop of water during flow boiling in a vertical narrow channel
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Two-phase pressure drop of water during flow boiling in a vertical narrow channel

机译：在垂直狭窄通道中沸腾时水的两相压降

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Two-phase pressure drop during flow boiling of water in a vertical channel with cross-section 2 mm by I turn was investigated experimentally. The experiments were performed for the conditions of heat flux from 25 to 105 kW/m(2), mass flux from 57 to 211 kg/ m(2)s and exit quality from 9% to 30%, including the influence of inlet compressibility. The two-phase pressure distribution along the channel was recorded at 200 Hz sampling frequency. The results were compared with four correlations. The Lockhart-Martinelli correlation for pressure drop in large tubes with modified C value has been shown to be still applicable with uncertainty of 35%. The homogeneous model had an uncertainty of 50%; the Tran and Chisholm methods over-estimated the experimental data by 100% and 300% respectively. It is shown that none of these correlations can predict published pressure drop data for water during flow boiling in a 50 by 70 micron channel. (C) 2003 Elsevier Inc. All rights reserved. [References: 12]
机译：实验研究了水流在横截面为2 mm的垂直通道中的水流沸腾过程中的两相压降。在以下条件下进行了实验：热通量为25至105 kW / m（2），质量通量为57至211 kg / m（2）s，出口质量为9％至30％，其中包括入口压缩性的影响。沿通道的两相压力分布以200 Hz采样频率记录。将结果与四个相关性进行比较。修正了C值的大型管中的压降的Lockhart-Martinelli相关性已显示出35％的不确定性仍然适用。均质模型的不确定度为50％; Tran和Chisholm方法分别高估了100％和300％的实验数据。结果表明，这些相关性均不能预测在50微米至70微米通道中的水沸腾过程中水的已公布压降数据。 （C）2003 Elsevier Inc.保留所有权利。 [参考：12]

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