化工学报2023，Vol.74Issue(11)：4527-4534,8.DOI:10.11949/0438-1157.20230897
考虑蒸发弯月面区域微观传热的热管径向传热系数研究
Study on radial heat transfer coefficient of heat pipes considering microscale heat transfer in evaporating meniscus region
摘要
Abstract
The temperature,curvature of the vapor-liquid interface and the microscale heat transfer mechanism near the evaporating meniscus region have important effects on the accurate prediction of heat transfer performance of heat pipes.The heat transfer at the evaporation end of the trapezoidal grooved copper-water heat pipe was simulated by coupling the microscopic heat transfer in the evaporation meniscus area with the macroscopic area heat transfer.The effects of gas-liquid interface temperature,curvature and microscopic heat transfer in the evaporation meniscus area on the radial heat transfer coefficient at the evaporation end of the heat pipe were studied.The results show that effects of the curvature of the vapor-liquid interface and the adhesion force between solid-liquid molecules(disjoining pressure)on the interface temperature cannot be ignored.The heat and mass transfer in the micro region has significant influence on the apparent contact angle and in the macro region and the macroscale temperature distribution in the heat pipe wall.The temperature difference in the macro solid region is smaller if considering the heat and mass transfer in the micro region.If the vapor-liquid interface temperature Tiv is assumed to be equal to the vapor saturation temperature Tsat,the radial heat transfer coefficient may be greatly overestimated.If the vapor-liquid interface temperature Tiv is equal to the vapor saturation temperature Tsat,the calculated radial heat transfer coefficient is hrad =7.8 W·cm-2·K-1,and a radial heat transfer coefficient hrad =4.2 W·cm-2·K-1 can be obtained after considering the heat and mass transfer in the micro region.关键词
蒸发/多尺度/数值模拟/热管/三相接触线Key words
evaporation/multiscale/numerical simulation/heat pipe/three-phase contact line分类
能源科技引用本文复制引用
丁圣洁,马莎莎,龚帅..考虑蒸发弯月面区域微观传热的热管径向传热系数研究[J].化工学报,2023,74(11):4527-4534,8.基金项目
国家自然科学基金项目(52376067) （52376067）
未来能源计划联合科研基金项目(110001JX0120220470) （110001JX0120220470）
上海交通大学深蓝计划项目(SL2022MS005) （SL2022MS005）
