泡沫铜强化石蜡相变蓄热特性的数值分析

被引:32
作者
姚元鹏
吴慧英
刘振宇
机构
[1] 上海交通大学机械与动力工程学院
关键词
泡沫铜; 相变蓄热; 热非平衡性; 火用分析;
D O I
暂无
中图分类号
TK124 [传热学];
学科分类号
080707 [能源环境工程];
摘要
通过构建泡沫金属内固液相变传热模型,对方腔蓄热单元中泡沫铜强化石蜡相变蓄热特性进行数值分析。数值模型采用考虑泡沫金属真实结构的等效导热系数通用模型,并兼顾石蜡在融化前后与金属骨架之间的热非平衡效应。通过求解模型得到方腔内石蜡固液界面演化规律与温度分布,进而对蓄热过程进行火用分析。结果表明:当前数值模型能较好地预测泡沫铜内固液相变传热;泡沫铜显著改善了石蜡相变的空间均匀性,减小了蓄热区温度梯度,使蓄热速率和火用效率得到有效提高。
引用
收藏
页码:87 / 93
页数:7
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