微小槽道内向列相液晶Stokes绕流空化实验研究  

Experimental Study on the Cavitation of Nematic Liquid Crystal Under Stokes Flow in a Microchannel

作　　者：于佳佳[1] 蒋璐阳 黄利[1] 吴春梅[1] 李友荣[1] YU Jiajia;JIANG Luyang;HUANG Li;WU Chunmei;LI Yourong(Key Laboratory of Low-grade Energy Utilization Technologies and Systems of Ministry of Education,School of Energy and Power Engineering,Chongqing University,Chongqing 400044,China)

机构地区：[1]重庆大学能源与动力工程学院低品位能源利用技术及系统教育部重点实验室,重庆400044

出　　处：《工程热物理学报》2025年第3期890-896,共7页Journal of Engineering Thermophysics

基　　金：国家自然科学基金项目(No.51806025);重庆市自然科学基金项目(No.CSTB2022NSCQ-MSX0416)。

摘　　要：本文报道了微小槽道内向列相5CB液晶绕流并联钝体水力空化现象。通过实验研究了并联双圆柱钝体对向列相5CB液晶空化特性的影响规律,探索了流动过程中向错环的变化规律。结果表明在并联双圆柱后出现的向错环的长度以及宽度都会随着雷诺数的增大而减小,并且在雷诺数远远小于1,处于Stokes流时,并联双圆柱后能够产生空化现象;并联双圆柱钝体后空化域的振荡行为与单圆柱钝体后空化域的振荡规律类似,斯特劳哈尔数随雷诺数的增大而减小;设置有并联双圆柱和单圆柱的微通道进出口压差与雷诺数均成线性关系。This paper reports the phenomenon of hydrodynamic cavitation of nematic liquid crystal 5CB flowing past side-by-side two circular pillars in a microchannel.The influence of the side-by-side two circular pillars on the cavitation characteristics of nematic liquid crystal 5CB is experimentally investigated,and the regularity of the in the flow process is explored.The results show that the length and width of the disclination loop behind the side-by-side two circular pillars will decrease with the increase of Reynolds number,and when the Reynolds number is far less than 1,under the Stokes flow,the hydrodynamic cavitation can occur behind the side-by-side two circular pillars;the oscillation behavior of the cavitation domain after the side-by-side two circular pillars is similar to that of the single circular pillar,and the Strauhl number decreases with the increase of the Reynolds number;The differential pressure between the inlet and outlet of the microchannel set up with side-by-side two circular pillars and single circular pillar is linearly related to the Reynolds number.

关 键 词：微小槽道 向列相液晶 水力空化 STOKES流 并联双圆柱 

分 类 号：O357[理学—流体力学]