罗小平,李欣雁,李晓婷

• 1:华南理工大学机械与汽车工程学院

摘要(Abstract)：

为研究相分离结构与脉动压力作用下微细通道内流动沸腾压降和综合性能，以乙醇为实验工质，氟化聚偏氟乙烯-共六氟丙烯(PVDF-HFP-F)多孔膜作为气液相分离工具，在入口温度为40℃、平均质量流率为68.89～192.89 kg·m~(-2)·s~(-1)、热流密度为69.7～125.07 kW·m~(-2)的工况下，针对不同脉动压力，在不同孔数(10孔、20孔、30孔)的相分离结构顺逆流微细通道内开展流动沸腾实验，研究了单独脉动压力作用下以及脉动压力与不同孔数相分离结构作用下微细通道内压降特性和Ledinegg不稳定性。采用平均传热综合性能指标(PEC)评估相分离结构与脉动压力下微细通道的沸腾传热性能。结果表明，相分离结构与脉动压力作用下，通道单位长度两相摩擦压降比单独脉动压力作用下最大降低了37.97%，总压降-流量曲线的两相沸腾区负斜率绝对值最大降低了48.17%；传热综合性能评价指标最高可达1.980。

关键词(KeyWords)： 顺逆流微细通道;脉动压力;相分离结构;压降;不稳定性;PEC

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(22178118)

作者(Author): 罗小平,李欣雁,李晓婷

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