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目的:明确微柱强化微通道流动沸腾换热性能。方法:采用多刀铣削-激光复合加工微柱阵列式微通道，基于高速相机搭建的可视化实验平台，捕捉流动沸腾过程中的流态变化和温度压力等表征参数。结果:不同流速下，与不添加微柱阵列的微通道比较，微柱阵列强化了微通道的换热性能，且不同形状微柱阵列的流态变化和换热性能不同。研究发现微柱阵列能够在一定程度上缓解微通道流动沸腾过程中的不稳定现象，压降波动值降低超过50%。结论:通道植入微柱阵列能够实现强化换热特性要求，并且有效缓解微通道流动不稳定现象，尤其是具有流线型的微柱阵列扰动能力最为显著。
Abstract：Aims: This paper aims to clarify the flow boiling heat transfer performance of microchannels enhanced by micro columns. Methods: A visualization experimental platform built with a high-speed camera was used to capture the flow changes and characterization parameters such as temperature and pressure during the flow boiling process. Results: At different flow rates, the microcolumn arrays strengthened the heat exchange performance of the microchannels compared with the microchannels without added microcolumn arrays; and the flow change and heat exchange performance of different shapes of microcolumn arrays were different. It was found that the microcolumn array could alleviate the instability phenomenon in the boiling process of microchannel flow to a certain extent and reduction of pressure drop fluctuation values by more than 50%. Conclusions: Channel implantation of micro-pillar arrays can realize the requirements of enhanced heat transfer characteristics, and effectively alleviate the phenomenon of micro-channel flow instability, especially with the streamlined micro-pillar arrays of the most significant perturbation ability.
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基本信息:
DOI：
中图分类号:TK124
引用信息:
[1]孙文凯,周芳,钱丽娟.微柱阵列微通道制造成型及换热性能研究[J].中国计量大学学报,2024,35(02):203-211.
基金信息:
国家自然科学基金项目(No.12372252,12272026,11927802,U1837211)