Investigations on post-dryout heat transfer in bilaterally heated annular channels
发布时间：2025-04-30
点击次数：
- 发布时间：
- 2025-04-30
- 论文名称：
- Investigations on post-dryout heat transfer in bilaterally heated annular channels
- 发表刊物：
- Annals of Nuclear Energy
- 摘要：
- Post-dryout heat transfer in bilaterally heated vertical narrow annular channels with 1.0, 1.5 and 2.0 mm gap size has been experimentally investigated with deionized water under the condition of pressure ranging from 1.38 to 5.9 MPa and low mass flow rate from 42.9 to 150.2 kg/m2s. The experimental data was compared with well known empirical correlations including Groeneveld, Mattson, etc., and none of them gave an ideal prediction. Theoretical investigations were also carried out on post-dryout heat transfer in annular channels.
Based on analysis of heat exchange processes arising among the droplets, the vapor and two tube walls of annular channel, a nonequilibrium mechanistic heat transfer model was developed. Comparison indicated that the present model prediction showed a good agreement with our experimental data. Theoretical calculation result showed that the forced convective heat transfer between the heated wall and vapor dominate the overall heat transfer. The heat transfer caused by the droplets direct contact to the wall and the interfacial convection/evaporation of droplets in superheated vapors also had an indispensable contribution. The radiation heat transfer would be neglected because of its small contribution (less than 0.11%) to the total heat transfer.
- 合写作者：
- Tian W X, Qiu S Z, Jia D N.
- 卷号：
- Vol.33/2
- 页面范围：
- 189-197
- 是否译文：
- 否
- 发表时间：
- 2006-02-10