摘要
少量的不凝性气体会在很大程度上削弱蒸汽凝结的热传递,现有的含不凝性气体的冷凝换热模型大都建立在理想气体状态方程的基础上,但高压条件下气体受到压缩作用,基于理想气体建立的传热模型预测值与实际值偏差较大。为建立高压下含不凝性气体的冷凝预测方法,对一体化堆安全分析提供技术辅助手段,本研究基于实际气体方程,在扩散层理论的基础上引入液膜波动因子、抽吸因子、雾化因子等修正系数,建立了高压下含不凝性气体的冷凝换热模型。本文模型和Kim试验数据进行了对比分析,改进后的模型比基于理想气体的模型预测值偏差范围更小,相对偏差大部分到±25%以内,充分体现了高压条件下模型的适用价值。
A small amount of non-condensable gas in the steam causes the condensation heat transfer decline greatly.The existing models on non-condensable gas condensation heat transfer could not predict the test well in high pressure,because the gas is compressed under high pressure conditions while the models based on the ideal gas state equation have not considered the pressure effect.To provide technical analysis assistant for integrated reactor safety,a new model was established for predicting the condensation of non-condensable gases under high pressure.Based on the real gas equation and the diffusion layer theory,the new model considered the film waviness effect,suction effect and atomization effect.The Kim’s test database was employed to validate the model,and the results show that the improved model has a smaller deviation band than the model based on the ideal gas.The relative deviation is mostly within±25%,which fully reflects the applicable value of the model under high pressure conditions.
作者
谭冰
蔡杰进
刘荣
常建
TAN Bing;CAI Jiejin;LIU Rong;CHANG Jian(School of Electric Power,South China University of Technology,Guangzhou 510641,China)
出处
《原子能科学技术》
EI
CAS
CSCD
北大核心
2021年第6期1047-1053,共7页
Atomic Energy Science and Technology
基金
国家自然科学基金资助项目(11675057)
广东省基础与应用基础研究基金资助项目(2020A1515010373)。
关键词
高压
不凝性气体
扩散模型
自然对流冷凝
high pressure
non-condensable gas
diffusion model
natural convection condensation
