化工进展2024，Vol.43Issue(4)：1690-1699,10.DOI:10.16085/j.issn.1000-6613.2023-0657
预冷通道中超临界甲烷换热特性分析
Analysis on heat transfer characteristics of supercritical methane in precooling channels
摘要
Abstract
In order to study the precooling performance of methane precooler,numerical research on heat transfer characteristics of supercritical methane in precooling channels were carried out based on Realizablek-eturbulence model.Influence mechanisms of methane pressure and precooler structural parameter on heat transfer were analyzed.Temperature field and flow field characteristics in the channel section were discussed,the effects of centrifugal force and secondary flow on heat transfer were explored,and the entropy generation in the heat transfer process was analyzed.The influence of thermal acceleration on heat transfer was investigated,and a new dimensionless factor and criterion for thermal acceleration were proposed.The heat transfer correlation was established by combining the centrifugal force term and the thermal acceleration term.The results show that the low thermal conductivity of thermal boundary layer in the inlet region causes the heat transfer deterioration,and the centrifugal force leads to the circumferential difference in heat transfer.The strong secondary flow appears in the channel cross-section,and the heat transfer entropy generation is significant.The increase in methane pressure is beneficial for suppressing the heat transfer deterioration and weakening the effect of centrifugal force.The increase in outer diameter of precooler will enhance the centrifugal force and exacerbate the heat transfer deterioration.When Ac exceeds 8.19×10-7,the thermal acceleration plays a role in the deterioration of heat transfer.The proposed heat transfer correlation can effectively predict the heat transfer of supercritical methane in precooled channels.关键词
微通道/超临界甲烷/传热/离心力/熵产/数值分析Key words
microchannels/supercritical methane/heat transfer/centrifugal force/entropy generation/numerical analysis分类
航空航天引用本文复制引用
王彦红,蒋雷,薛帅,李洪伟,贾玉婷..预冷通道中超临界甲烷换热特性分析[J].化工进展,2024,43(4):1690-1699,10.基金项目
国家自然科学基金(52106196) （52106196）
吉林省教育厅科技项目(JJKH20220100KJ). （JJKH20220100KJ）
