通道内柔性体流固耦合对流动和换热的影响  

Influence of Fluid-Solid Coupling on Flow and Heat Transfer in a Channel with a Flexible Body Inserted

作　　者：麻程柳 杨茉[1] 李峥 陈凯[1] MA Chengliu;YANG Mo;LI Zheng;CHEN Kai(School of Energy and Power Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China;Vanderbilt University,Nashville,Tennessee 37240,US)

机构地区：[1]上海理工大学能源与动力工程学院,上海200093 [2]Vanderbilt University,Tennessee 37240,USA

出　　处：《动力工程学报》2020年第8期635-640,653,共7页Journal of Chinese Society of Power Engineering

基　　金：国家自然科学基金资助项目(51736007,51476103)。

摘　　要：以新型冲孔矩形涡流发生器流道内的流动与换热为背景,模拟了流道内插柔性体的流固耦合对流换热过程,研究柔性体涡流发生器的振荡对通道内涡量场及其换热性能的影响,探究通道内柔性体流固耦合强化换热的机理。结果表明:柔性体在变形过程中会使流场中产生尾涡,且当其在一个拍打周期内达到最大弯曲程度时,尾涡会在后缘脱落到尾流中,使得冷、热流体剧烈掺混,从而起到强化换热的作用;随着Re的增大,换热强度提高得更快,在Re=3000时通道中安装单个柔性体涡流发生器可以使通道对流换热强度提高39.4%。Based on the flow and heat transfer in the channel of a new type of pierced rectangular vortex generator(PRVG),the fluid-solid coupled convective heat transfer process with flexible body inserted in the channel was simulated to study the influence of the oscillation of PRVG on the vorticity field and heat transfer performance in the channel,and to explore the mechanism of heat transfer enhancement by the fluid-solid coupling.Results show that the flexible body would produce trailing vortex in the flow field during the deformation process,and when the body reaches its maximum bending degree in a beating cycle,the trailing vortex would fall off into the wake flow at the trailing edge,making the cold and hot fluid mix violently,thus enhancing the heat transfer.With the increase of Re,the heat transfer intensity tends to increase.When Re=3000,installing a single flexible body in the channel could increase the intensity of the convective heat transfer by 39.4%.

关 键 词：流固耦合 对流 换热 柔性体 数值模拟 

分 类 号：TK172[动力工程及工程热物理—热能工程]