罗小平¹,范一杰¹,周建阳^1,2,张超勇¹

• 1:华南理工大学 机械与汽车工程学院， 广东 广州 510641
• 2:广西大学 化学化工学院， 广西 南宁 530004

摘要(Abstract)：

为探究电场与声场对微细通道流动沸腾气泡特性以及传热性能的影响，以R141b纯制冷剂为工质，进行电场、声场、电场与声场协同作用下的传热实验。对气液两相流高速摄影图像进行拓扑特征分析，利用一维贝蒂数β₁与气泡数的关系、零维贝蒂数β₀与受限气泡数的关系，对电场、声场作用下气泡传热特性进行定量研究。结果表明：400、600、800 V电场作用下β₁分别提高了23.3%、36.3%、43.1%，β₀分别降低了13.6%、19.6%、23.2%，表明电场可使流动沸腾气泡数增多，受限气泡数减少，传热强化效果在800 V电场下最优，沿程传热强化系数达到1.56；在不同频率(23、40 kHz)、不同功率(12.5、50 W)声场作用下，β₁提高了22.7%~55.6%，β₀降低了12.8%~25.8%，表明声场可使流动沸腾气泡数增多，受限气泡数减少，传热强化效果在23 kHz、50 W声场下最优，沿程传热强化系数达到1.79；电场、声场同时作用对气泡特性与传热效果的影响大于单独作用，同时作用下β₁提高76.2%，β₀降低35.7%，沿程传热强化系数达到2.06。

关键词(KeyWords)： 微细通道;沸腾传热;电场;超声场

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(22178118)；广东省自然科学基金(2019A1515011053)。

作者(Author): 罗小平¹,范一杰¹,周建阳^1,2,张超勇¹

DOI: 10.3969/j.issn.1003-9015.2023.06.005

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