不同流道高度竖直矩形通道中核沸腾起始的实验研究

IF 1 4区工程技术 Q3 NUCLEAR SCIENCE & TECHNOLOGY

Science and Technology of Nuclear Installations Pub Date : 2022-01-30 DOI:10.1155/2022/7760569

N. Cheng, Shuwen Yu, J. Xiao, C. Peng

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引用次数: 0

摘要

在质量通量为100 ~ 300 kg/(m2·s)，进水温度为70 ~ 100℃，热流密度为10 ~ 70 kW/m2，局部压力为0.145 MPa的条件下，对两个垂直矩形通道内的ONB(核沸腾起始)进行了实验研究。截面尺寸分别为1.8 mm∗60 mm和2.8 mm∗60 mm。利用三种沸腾起始判断方法对ONB点进行了定位，发现Δ T ONB (ONB点壁面过热度)随入口温度的降低而增大，随质量通量的增大而增大。结果还表明，尽管在ONB位置，窄通道内的气泡大小和行为与非窄通道内的气泡大小和行为不同，但传热没有受到明显影响。此外，通过Thom提出的相关性可以在±30%的误差范围内预测两个通道中的Δ T ONB。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Experimental Study of Onset of Nucleate Boiling in Vertical Rectangular Channels with Different Flow Path Heights

A study on ONB (onset of nucleate boiling) in two vertical rectangular channels are experimentally conducted in a range of mass flux varying from 100 to 300 kg/(m2·s), inlet water temperature from 70 to 100°C, heat flux from 10 to 70 kW/m2, and local pressure of 0.145 MPa. The cross-section sizes are 1.8 mm ∗ 60 mm and 2.8 mm ∗ 60 mm, respectively. Three boiling incipience judgment methods have been used to locate ONB sites and found that Δ T ONB (the wall superheat at ONB site) increases with the decrease of inlet temperature and increases as mass flux increases. The results also indicate that although the bubble size and behaviors in the narrow channel are different from that in the nonnarrow channel at the ONB site, the heat transfer has not been influenced evidently. In addition, Δ T ONB in both channels can be predicted by the correlation proposed by Thom within the error range of ±30%.

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来源期刊

Science and Technology of Nuclear Installations NUCLEAR SCIENCE & TECHNOLOGY-

CiteScore

2.30

自引率

9.10%

发文量

审稿时长

4-8 weeks

期刊介绍： Science and Technology of Nuclear Installations is an international scientific journal that aims to make available knowledge on issues related to the nuclear industry and to promote development in the area of nuclear sciences and technologies. The endeavor associated with the establishment and the growth of the journal is expected to lend support to the renaissance of nuclear technology in the world and especially in those countries where nuclear programs have not yet been developed.