
1. 河北建筑工程学院能源工程系
2. 河北水利电力学院土木工程系
3. 河北省数据中心相变热管理技术创新中心
4. 沧州市储热及低品位余热利用型电磁供热技术创新中心
Published:2024
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张超群, 李树谦, 周鹏程, et al. 具有仿生结构的并联微细多通道蒸汽直接接触凝结数值模拟[J]. 2024, 16(2): 69-78.
张超群, 李树谦, 周鹏程, et al. 具有仿生结构的并联微细多通道蒸汽直接接触凝结数值模拟[J]. 2024, 16(2): 69-78. DOI: 10.16056/j.2096-7705.2024.02.012.
为进一步丰富微细尺度条件下蒸汽直接接触凝结(DCC)流动换热现象的研究,基于哺乳动物动脉或静脉的分支血管树系统,设计了一种具有仿生结构的并联微细多通道模型。在商业软件Fluent上采用VOF多相流模型、大涡模拟(LES)湍流模型和凝结双阻力模型,进行并联微细多通道的蒸汽直接接触凝结数值模拟,获得了并联多通道中的汽羽形态、温度和压力分布以及凝结速率随时间的变化情况。结果表明:汽羽在水平主管凝结过程中会发生聚并,过冷水会周期性进入各竖直支管且各进入高度接近;压力分布在各竖直支管中存在一定差异;微细尺度下凝结仍发生在汽液界面附近,且每个凝结周期中平均凝结速率在汽羽完全聚并之前达到最大值,约为220 kg/(m
3
·s),在过冷水进入各竖直支管的过程达到最小值,约为17 kg/(m
3
·s)。
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