扩缩型微通道内流体流动及传热特性数值分析

来源 :低温与超导 | 被引量 : 0次 | 上传用户：vacer2008

【摘要】

：

微通道内扩缩结构的布置,有利于诱发二次涡流,提高传热性能.基于单侧矩形肋微通道(MC-OS-RR),提出了单侧矩形肋和空腔(MC-RR.RC)、单侧矩形肋和扰流柱(MC-RR.RPF)两种组合结构微通道优化模型.在验证数值方法有效性的基础上,以去离子水为流动介质,运用Fluent软件模拟研究了不同体积流量、壁面温度、进口温度条件下扩缩型微通道的流动与传热特性.结果表明,空腔和扰流柱结构的引入,能进一步诱发二次流,促进流动混合,低体积流量下有利于增强单侧矩形肋微通道整体性能;相比空腔结构,布置于通道中央的扰

【作者】

：

朱章钰李娟郭慧珍翟昊

【机构】

：

南京林业大学机械电子工程学院,南京210037

【出处】

：

低温与超导

【发表日期】

：

2021年7期

【关键词】

：

扩缩结构微通道强化传热优化设计

下载到本地 , 更方便阅读

下载此文赞助VIP

声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架

论文部分内容阅读

其他文献

The importance of pre-and postcopulatory sexual selection promoting adaptation to increasing tempera

Global temperatures are increasing rapidly affecting species globally.Understanding if and how different species can adapt fast enough to keep up with increasing temperatures is of vital import-ance.One mechanism that can accelerate adaptation and promote

期刊

evolutionary rescuelocal adaptationclimate changeDrosophilasexual selection

Not so black,not so white:differences in microorganism load of contiguous feathers from white stork

Many organisms are characterized by strikingly contrasting black and white coloration,but the function of such contrasts has been inadequately studied.In this article,we tested the function of black and white contrasting plumage in white stork Ciconia cic

期刊

accumulation of microorganismsCiconia ciconiafungimicrobiome

Coordination and consensus:the role of compromisers in Tibetan macaques

Coordination and consensus in collective behavior have attracted a lot of research interest.Although previous studies have investigated the role of compromisers in group consensus,they provide little insight into why compromisers would allow such social a

期刊

collective decision-makingcoordinationcompromiseTibetan macaquetrade-off

Modularity and specialization in bat-fly interaction networks are remarkably consistent across patch

Patterns of specialization and the structure of interactions between bats and ectoparasitic flies have been studied mostly on non-urban environments and at local scales.Thus,how anthropogen-ic disturbances influence species interactions and network struct

期刊

Chiropteraectoparasiteshost-parasite networkneotropicsStreblidaeurbanizatio

Sexual selection for bright females prevails under light pollution

The functions of sexually selected traits are particularly sensitive to changes in the environment because the traits have evolved to in-crease mating success under local environmental conditions(Rosenthal and Stuart-Fox 2012).When environmental condition

期刊

environmental changemate choicemate attractionreproductionsexual selection

Tourism may trigger physiologically stress response of a long-term habituated population of golden s

Wildlife tourism is a thriving form of nature-based tourism that can provide revenue for conservation funds,and increase public aware-ness of biodiversity conservation (Xiang et al.2011).Tourism,how-ever,may induce behavioral and physiological stress resp

期刊

Behavioral evidence for the origin of Chinese Kunming dog

As the only working dog independently developed and bred in China,Chinese Kunming dog (CKD) was approved as a new breed by the Chinese National Livestock and Poultry Genetics Commission in 2007.Now CKD is widely used by the Chinese army and police and has

期刊

behavior testChinese Kunming dogorigin

基于REBCO环片的环向磁体的俘获场特性

利用REBCO环片的结构,研制出一种由六组单元环向场磁体沿环向均匀分布组合构成的环向磁体样机.其中每组单元环向场磁体由REBCO环片和绝缘片交替堆叠构成.在77 K温度下,采用四引线法测得单个REBCO环片的临界电流为43 A.基于场冷和多脉冲场两种磁化方法,通过霍尔探头测得两种磁化方法下单个环向场磁体俘获磁场分别为2.43 mT和1.87 mT.结果表明,环向磁体实现了在无电流引线和无焊接电阻下的持续电流运行.因此,这种结构的环向磁体可作为永久磁体俘获高磁场,有望应用于大规模的环向磁体并为环向磁体的工业

期刊

多脉冲场环向磁体REBCO环片

Climate extremes,variability,and trade shape biogeographical patterns of alien species

Understanding how alien species assemble is crucial for predicting changes to community struc-ture caused by biological invasions and for directing management strategies for alien species,but patterns and drivers of alien species assemblages remain poorly

期刊

biological invasionbiogeographyclimate changeclimate extremesclimate variabi

基于RBF神经网络的SMES控制策略

针对超导磁储能(Superconducting Magnetic Energy Storage,SMES)中传统比例积分(Proportion Integration,PI)控制器控制参数不能更新的问题,提出了基于径向基函数(Radical Basis Function,RBF)神经网络的PI控制策略.以SMES电压源型变流器为研究对象,对其拓扑结构进行建模分析,在交流侧及直流侧控制部分采用RBF神经网络改进策略.该策略的主要功能是利用RBF神经网络的辨识能力对系统模型进行动态辨识,然后将PI控制参数与辨

期刊

超导磁储能RBF神经网络PI控制功率跟踪

扩缩型微通道内流体流动及传热特性数值分析

与本文相关的学术论文