中国空间科学技术（中英文）2024，Vol.44Issue(5)：66-74,9.DOI:10.16708/j.cnki.1000-758X.2024.0074
微流控氧化硅纳米流体强化流动沸腾传热
Preparation of silicon oxide nanofluids via microfluidic for enhanced flow boiling heat transfer
摘要
Abstract
Enhanced microchannel flow boiling heat transfer using nanofluids is an effective method to improve the heat transfer performance of high-power electronic devices.However,conventional nanofluids face the challenges of complex fabrication processes,poor stability,and the inability to control nanoparticle size,which negatively affect the overall heat transfer efficiency.A simple microfluidic synthesis strategy is developed to prepare highly stable and size-controlled silica nanofluids in a continuous,efficient and high-throughput manner.A specially designed helical microchannel reactor enables continuous flow one-step synthesis of stable nanofluids with controllable particle sizes ranging from 30 nm to 110nm simply by flow rate adjustment.The results of flow-boiling heat transfer experiments show that at higher flow rates(0.4m/s),the heat transfer performance of smaller-sized nanoparticles(≤55nm)is better than that of larger-sized nanoparticles(110nm),and the enhancement for critical heat flux(CHF)and heat transfer coefficient(HTC)reaches 90.9%and 68%respectively.The enhanced wettability of the boiling surface,efficient surface nucleation,and improved bubble dynamics provide theoretical explanations for the enhanced heat transfer performance.These findings provide not only a new method for controllable preparation of nanofluids,but also new ideas for efficient two-phase chip cooling of power devices in aerospace and power electronics.关键词
热管理/流动沸腾/纳米流体/微通道/强化传热Key words
thermal management/flow boiling heat transfer/nanofluid/microchannel/enhanced heat transfer分类
航空航天引用本文复制引用
陈洪强,高权,马祥,张永海,魏进家..微流控氧化硅纳米流体强化流动沸腾传热[J].中国空间科学技术（中英文）,2024,44(5):66-74,9.基金项目
国家重点研发计划(2022YFF0503502) （2022YFF0503502）
国家自然科学基金(51976163) （51976163）
国家自然科学基金联合基金(U2141218) （U2141218）
西安交通大学青年创新团队(No.xtr052022011) （No.xtr052022011）
西安交通大学青年拔尖人才支持计划 （）
西安交通大学基本科研业务费(XZY022023029) （XZY022023029）
