流体机械2024，Vol.52Issue(8)：31-38,8.DOI:10.3969/j.issn.1005-0329.2024.08.005
旋流通道内超临界氮的换热性能研究
Research on heat transfer performance of supercritical nitrogen in swirling flow channels
摘要
Abstract
In order to study the heat transfer performance of supercritical nitrogen in spiral tube.By means of numerical simulation and experiments,the changes of flow and heat transfer caused by physical properties of supercritical nitrogen along and around the spiral tube,the influences of flow and structural parameters on heat transfer coefficient h,fluid temperature Tf,wall temperature Tw and pressure P1 were discussed,the sensitivity of each structural parameter is quantitatively analyzed.The results show that:when the fluid temperature is near the critical temperature127.15 K,heat transfer coefficient reaches the peak value.The maximum sensitivity values of pipe diameter d to h,Tout and P1 are 2.47,0.42 and 2.15,indicating that the change of d value has the greatest effect on flow heat transfer.The data were processed and the heat transfer correlation formula of supercritical nitrogen was fitted based on spiral tube structure characteristics,the maximum error between the simulated value and the formula value was 12%.The research results can provide reference for the application and promotion of spiral tube heat exchangers.关键词
LNG气化器/螺旋管/超临界氮/数值模拟/换热性能Key words
LNG gasifier/spiral tube/supercritical nitrogen/numerical simulation/heat transfer performance分类
机械制造引用本文复制引用
夏春杰,陈永东,吴晓红,宋嘉梁,邓靜,程沛..旋流通道内超临界氮的换热性能研究[J].流体机械,2024,52(8):31-38,8.基金项目
国家重点研发计划项目(2022YFB3306401) （2022YFB3306401）
合肥通用机械研究院有限公司博士科技基金项目(2020011749) （2020011749）
大型液化装置制冷换热设备选型评价研究项目(2023012243) （2023012243）
