化工学报Issue(9)：3425-3433,9.DOI:10.3969/j.issn.0438-1157.2014.09.016
含空气蒸汽冷凝传热特性数值模拟
Numerical simulations for steam condensation in presence of air
宿吉强 1王辉 2孙中宁 1张东洋1
作者信息
- 1. 哈尔滨工程大学核安全与仿真技术国防重点学科实验室，黑龙江 哈尔滨 150001
- 2. 中国核电工程有限公司，北京 100840
- 折叠
摘要
Abstract
The passive containment cooling system (PCCS) is widely used in the next generation of nuclear reactor systems to maintain the integrity of containment for longer time after utmost accidents such as the loss of coolant and main steam line break. For double concrete containment, the condenser is one of the most essential equipment in the PCCS and its heat transfer capability determines its performance. In the steam condensation process, the presence of large amounts of non-condensable gases will lead to serious deterioration of heat transfer, so further study on steam condensation in the presence of air must be conducted. In this study, condensation processes of steam in the presence of air are modeled by applying a user defined function added to the commercial computational fluid dynamics package. Calculated profiles of temperature, air concentration, velocity components and condensation heat transfer coefficient are compared to experimental results. The simulation results indicate a good agreement between the experimental results and model predictions. It also shows that both the latent and the sensible heat transfer coefficient decrease with the increase of air mass fraction, and the latent heat transfer is a dominant factor in the total condensation heat transfer at air mass fractions less than 50%. Local latent heat coefficient presents an upward tendency along the axial direction of heat transfer tube from the bottom to the top, while the sensible heat transfer coefficient takes an opposite trend.关键词
空气/凝结/传热/潜热传热系数/数值模拟Key words
air/condensation/heat transfer/latent heat transfer coefficient/numerical simulation分类
能源科技引用本文复制引用
宿吉强,王辉,孙中宁,张东洋..含空气蒸汽冷凝传热特性数值模拟[J].化工学报,2014,(9):3425-3433,9.
