A Novel Asymmetric Check Microvalve for Suppressing Flow Boiling Instability in Microchannels
作者机构：MIIT Key Laboratory of Thermal Control of Electronic EquipmentSchool of Energy and Power EngineeringNanjing University of Science and Technology
出 版 物：《Journal of Thermal Science》 (热科学学报(英文版))
年 卷 期：2024年第33卷第6期
页 面：2336-2347页
核心收录：
学科分类：080701[工学-工程热物理] 08[工学] 0807[工学-动力工程及工程热物理]
基 金：the financial support from the National Natural Science Foundation of China with Grant No.52276070 the Fundamental Research Funds for the Central Universities with Grant No.30922010903
主 题：bubble dynamics flow boiling instability microchannel topology optimization
摘 要：Flow boiling in microchannels has attracted wide attention due to its excellent heat transfer capability,but flow boiling instability is a huge challenge limiting its *** can lead to a series of problems,such as uneven flow distribution,temperature and pressure drop *** work proposes a novel asymmetric check microvalve(ACMV) structure,exhibiting high ratio of resistance between the reverse and forward *** results show the reverse pressure drop of the ACMV structure is 2.06 times that of the forward pressure drop,and the forward flow resistance of the ACMV structure is 16% smaller than that of the conventional inlet *** addition,bubble dynamics of an isolated bubble in the generated channel under dual outlet condition was numerically *** is found that the bubble grows symmetrically in the rectangular channel upstream and *** distance of bubble movement downstream in the microchannel with ACMV is three times that of the microchannel with inlet *** microchannel with ACMV can suppress the backflow of isolated bubble better than microchannel with inlet ***,the growth of the bubble downstream extends the effective evaporation domain,which contributes to the enhanced bubble growth *** ACMV is expected to be a potential replacement for the conventional inlet restrictor,which provides a novel and efficient solution for future heat dissipation from high power devices.
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