Experimental investigation and a mechanical model of critical heat flux in a narrow rectangular channel

Experimental investigation and a mechanical model of critical heat flux in a narrow rectangular channel
复制标题

窄矩形通道内临界热通量的实验研究和力学模型

DOI:
10.1016/j.expthermflusci.2021.110432
复制
发表时间:
2021-10
影响因子:
3.2
通讯作者:
Liang-ming Pan
Liang-ming Pan
中科院分区:
工程技术2区
文献类型:
--
作者:
Meiyue Yan;Qingche He;Zaiyong Ma;Hao Liu;Lingfeng Wan;Zhongchun Li;Liang-ming Pan

文献摘要

参考文献

相似文献

CHF是沸腾传热热通量的最大极限,因此,它是对核系统安全性和经济性产生根本性影响的关键参数。本研究进行了一项实验研究,以确定不同间隙尺寸(2 毫米和 3 毫米)的狭窄矩形通道中的主要 CHF 机制。可视化实验在压力范围为 1 至 4 MPa、入口过冷度为 60 至 120 K、质量通量为 350–2000 kg/(m2·s) 的条件下进行。通过可视化现象和气泡动力学分析,提出了 DNB 型 CHF 的理论模型。开发了一组本构相关性来封闭模型。使用垂直狭窄矩形通道中向上流动的实验数据对新模型进行了评估。预测结果具有良好的准确性,相对于现有CHF数据和高压条件下的其他CHF数据,预测精度小于30%。
CHF is the maximal limit of heat flux in boiling heat transfer, therefore, it is a crucial parameter that has a fundamental impact on the security and economy of the nuclear system. An experimental investigation was carried out in the present study to identify the dominant CHF mechanism in a narrow rectangular channel at different gap sizes (2 mm and 3 mm). The visualization experiments were performed at pressures ranging from 1 to 4 MPa, inlet subcooling from 60 to 120 K, and mass flux of 350–2000 kg/(m2·s). A theoretical model of DNB-type CHF has been proposed through visualization phenomena and bubble dynamics analysis. A set of constitutive correlations is developed to close the model. An assessment of the new model has been conducted using the experimental data for the upward flow in a vertical narrow rectangular channel. The predicted results show good accuracy, which is less than 30% relative to the present CHF data and other CHF data under high-pressure conditions.
DOI: 10.1615/jenhheattransf.v17.i2.10
发表时间: 2010
影响因子: 2.3
作者:
Jian-jun Xu;Bingde Chen;Xiaojun Wang
通讯作者: Jian-jun Xu;Bingde Chen;Xiaojun Wang
DOI: 10.1016/j.nucengdes.2015.07.022
发表时间: 2015-12
影响因子: 1.7
作者:
G. S. Choi;Y. Jeong;Soon-Heung Chang
通讯作者: G. S. Choi;Y. Jeong;Soon-Heung Chang
DOI: 10.1016/0017-9310(69)90153-7
发表时间: 1969-08
影响因子: 5.2
作者:
E. Ishibashi;K. Nishikawa
通讯作者: E. Ishibashi;K. Nishikawa
DOI: --
发表时间: 2020
期刊: --
影响因子: --
作者:
W. Ding;T. Geissler;E. Krepper;U. Hampel
通讯作者: W. Ding;T. Geissler;E. Krepper;U. Hampel
DOI: --
发表时间: 2003
期刊: --
影响因子: --
作者:
Nilanjana G. Basu
通讯作者: Nilanjana G. Basu