基于水动力空化的微通道设备研究进展

doi:10.3969/j.issn.1671-7775.2024.06.007

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摘要针对微通道设备中的水动力空化现象，从限流元件的几何形状及尺寸、工作流体和通道粗糙度3个方面分析了其影响规律.限流元件的常见形状主要有微孔、微文丘里、微隔膜和微柱，不同几何形状的限流元件具有不同的空化流动特性；限流元件自身的尺寸参数以及尺寸缩小引起的尺度效应都对空化流型起着重要作用.常用的工作流体包含去离子水、乙醇、磷酸盐缓冲盐水（PBS）、制冷剂（R-123）、聚乙烯醇（PVA）微泡（MBs）悬浮液、全氟戊烷（PFC5）悬浮液、二氧化钛（TiO2）纳米颗粒悬浮液、多元液体混合物等；与水相比，其余工作流体均不同程度地提高了空化强度.粗糙度的引入主要体现于通道的表面粗糙元件和侧壁粗糙元件，其空化强度相较于光滑表面得到明显提高.微通道水动力空化设备主要应用于能量收集、液相剥离和生物医学领域.基于近年来国内外对微尺度水动力空化的研究现状，设想了微通道设备中的水动力空化现象的潜在研究方向及应用趋势.

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	张金凤
	徐笑
	赵东波
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	王禹涵

关键词 ：微通道设备, 微流体技术, 限流元件, 工作流体, 通道粗糙度, 水动力空化, 空化流型

Abstract：To investigate the hydrodynamic cavitation phenomenon in microchannel devices, the influence laws were analyzed from three aspects of geometric shapes and dimensions of flow restrictive elements, working fluids and channel roughness. The common shapes of flow restrictive elements are mainly microorifice, microventuri, microdiaphragm and micropillar. Different geometries of flow restrictive elements have different cavitating flow characteristics. The dimensional parameters of the flow restrictive elements and the scale effect caused by the size reduction play an important role in the cavitating flow patterns. The commonly used working fluids contain deionized water, ethanol, phosphatebuffered saline (PBS), refrigerant (R123), poly(vinyl alcohol) (PVA)，microbubbles (MBs) suspension, perfluoropentane (PFC5) suspension, titania nanoparticle suspension, binary liquid mixtures, etc. Compared to water, the remaining working fluids can increase cavitation intensity to different degrees. The introduction of roughness is mainly realized by the surface roughness elements and sidewall roughness elements of the channel, and the cavitation intensity can be significantly improved compared to that of the smooth surface. Microchannel hydrodynamic cavitation devices are mainly used in energy harvesting, liquidphase exfoliation and biomedical fields. Based on the research status of microscale hydrodynamic cavitation at home and abroad in recent years, the potential research directions and application trends of hydrodynamic cavitation phenomena in microchannel devices are provided.

Key words： microchannel device microfluidics flow restrictive element working fluid channel roughness hydrodynamic cavitation cavitating flow patterns

基金资助:江苏省产业前瞻与关键核心技术重点项目(BE2019009-1)

作者简介: 张金凤(1981—),女,内蒙古赤峰人,研究员,博士生导师(zhangjinfeng@ujs.edu.cn),主要从事流体机械水力设计优化及内部流动特性的研究. 徐笑(1995—),男,江苏泰兴人,博士研究生(xuxiao@stmail.ujs.edu.cn),主要从事微通道混合器内部流动特性及优化设计的研究.

引用本文:

张金凤，徐笑，赵东波，张静，王禹涵. 基于水动力空化的微通道设备研究进展[J]. 江苏大学学报（自然科学版）, 2024, 45(6): 666-675. ZHANG Jinfeng, XU Xiao, ZHAO Dongbo, ZHANG Jing, WANG Yuhan. Research progress of microchannel devices based on hydrodynamic cavitation[J]. Journal of Jiangsu University(Natural Science Eidtion) , 2024, 45(6): 666-675.

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http://zzs.ujs.edu.cn/xbzkb/CN/10.3969/j.issn.1671-7775.2024.06.007 或 http://zzs.ujs.edu.cn/xbzkb/CN/Y2024/V45/I6/666

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