华中科技大学学报（自然科学版）2024，Vol.52Issue(7)：119-125,7.DOI:10.13245/j.hust.240498
多层材料/气冷屏传热二维模型与绝热性能
Two-dimensional modeling and thermal insulation performance of multilayer insulation/vapor-cooled shield
摘要
Abstract
To provide more accurate guidance for the design of multi-layer insulation(VD-MLI)/vapor-cooled shield(VCS)composite insulation structures of cryogenic storage tanks,a two-dimensional VD-MLI/VCS model was established,focusing on the influence of temperature rise of the cryogenic gas in VCS on the spatial distribution of insulation performance.A comparative analysis was conducted on the predictive ability of traditional one-dimensional model and newly constructed two-dimensional model,as well as the heat transfer law of composite insulation structures.The results show that the heat leak reaches the minimum value when VCS is arranged at 16th layer of VD-MLI,which is 0.11 W/m2.The one-dimensional model underestimates the heat leak of the storage tank by 9%.The cooling effect of VCS gradually weakens since the heat leak of the storage tank increases from 0.02 W/m2 to 0.23 W/m2 along the flow direction of hydrogen.The temperature field of VD-MLI/VCS insulation structure exhibits different patterns of two-dimensional distribution as the position of VCS changes,resulting in inconsistent insulation performance in various parts of the storage tank.It is recommended to arrange VCS within the range of 26.7%to 68.3%of the total thickness of VD-MLI.关键词
变密度多层绝热/气冷屏/低温贮箱/二维建模/绝热性能Key words
variable density multilayer insulation/vapor-cooled shield/cryogenic tank/two-dimensional modeling/insulation performance分类
通用工业技术引用本文复制引用
黄奕宁,王磊,马原,厉彦忠..多层材料/气冷屏传热二维模型与绝热性能[J].华中科技大学学报（自然科学版）,2024,52(7):119-125,7.基金项目
国家自然科学基金资助项目(51976151). （51976151）
