Numerical Analysis on the Characteristics of Steam Condensation in Presence of Air under Vertical Tube Bundle Conditions

被引：0
|
作者：
Quan B. [1 ]
Bian H. [2 ]
Ding M. [2 ]
Luo H. [1 ]
Zou Z. [1 ]
Li F. [1 ]
Sun Z. [2 ]
机构：
[1] Science and Technology on Reactor System Design Technology Laboratory, Nuclear Power Institute of China, Chengdu
[2] Fundamental Science on Nuclear Safety and Simulation Technology Laboratory, Harbin Engineering University, Harbin
来源：
Hedongli Gongcheng/Nuclear Power Engineering | 2019年 / 40卷 / 05期
关键词：
Local phenomena; Non-condensable gas; Numerical simulation; Steam condensation; Tube bundle;
D O I：
10.13832/j.jnpe.2019.05.0029
中图分类号：
学科分类号：
摘要：
Numerical simulations on steam condensation in the presence of air under tube bundle conditions were performed based on the software STAR-CCM+. Calculations were carried out based on a the 3 by 3 tube bundle which has a tube pitch of double diameter, aiming at recognizing local field distributions and thermal-hydraulic characteristics of various tubes. Results indicate that the air layers of various tubes interfere in the tube bundle region, forming a larger high concentration air layer region. On the one hand, this enlarges local velocity and facilitates convective heat transfer; and on the other hand increases the air layer thickness and inhibits condensation heat transfer. On the effect of bundle structure, the concentration, temperature and velocity in the tube bundle region are obviously different from those of the single tube one, sharply decreasing the local heat transfer coefficient by 50% and has a maximum variation of 1.88 times circumferentially. The axial heat transfer property mainly is affected by the development of concentration boundary layer, and circumferential heat transfer property by the adjacent tubes. By analyzing the average heat transfer coefficient, it indicates that compared to the single tube, the maximum reduction of the bundle tube average heat transfer coefficient is 9.06%. © 2019, Editorial Board of Journal of Nuclear Power Engineering. All right reserved.
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页码：29 / 34
页数：5
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