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在多尺度增材制造的滑动表面上维持低表面张力流体的高性能滴向冷凝

Huanyu Zhao¹, Xinrui Wang¹, Hanyang Ye¹

¹School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Republic of Singapore.

ACS applied materials & interfaces

|February 19, 2026

概括

稳定的滴状凝结 (DWC) 对工业至关重要,但由于洪水而经常失败. 这项研究表明,滑滑滑剂注入表面 (SLIPS) 的多尺度粗性显著提高了低表面张力流体的防洪性能和热传递.

科学领域:

材料科学与工程材料科学与工程
表面科学是一门学科.
热传递热量转移的方法

背景情况:

在工业应用中实现稳定的滴状冷凝 (DWC) 是一个持续的挑战,原因是湿状态过渡 (洪水) 和材料降解.
滑滑的滑剂注入表面 (SLIPS) 显示出各种流体的DWC有前途,但基板粗性形态学的影响仍未得到充分研究.
现有的研究往往侧重于滑剂化学,忽视了表面结构在维护DWC稳定性方面的关键作用.

研究的目的:

调查多尺度微和纳米粗度对增材制造 (AM) SLIPS防洪性能和动态湿度的影响.
开发和使用一种新的改进的威廉米板设置,用于探测毛细血管力,并比较不同结构的AM SLIPS的湿度.
评估层次结构的SLIPS的长期稳定性和传热效率,用于低表面张力流体的滴状凝结.

主要方法:

用AlSi10Mg合金进行增材制造 (AM),以创建具有多尺度粗度的表面.
制造滑滑的滑剂注入表面 (SLIPS) 使用工程粗度.
采用修改后的威廉米板设置来测量动态可湿性和毛细血管力.
使用乙醇蒸汽在高次冷却条件下进行长期滴滴凝结试验.

主要成果:

两层层次的层次结构的SLIPS显示了乙醇DWC的显著改善的动态湿稳定性和防洪性能.
层次的SLIPS保持了高的传热系数 (70007300 W/m2·K),约占薄膜凝结 (FWC) 的280%.
经过100小时的连续高次冷却运行后,没有观察到任何显著的降解,与快速失效的单层表面不同.

结论:

微/纳米级的粗度是提高防洪性能和确保长期稳定的滴水凝结的关键因素.
层次的表面结构对于持久的DWC至关重要,特别是在苛刻的操作条件下,对于低表面张力流体至关重要.
这项工作提供了通过优化表面形态来设计强大和高效的DWC系统的基本准则.

关键词:

增材制造增材制造是一种增材制造.在 AlSi10Mgg 中.一滴一滴的凝结方式.乙醇乙醇是一种液体注入表面 (LIS) 是指液体注入表面.低表面张力的流体滑动滑油注入表面 (SLIPS) 是指滑动滑油注入表面.

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