分层流体孤立子模型的实验重现及流场分析  

Experimental reconstruction and flow-field analysis of stratified fluid soliton model

作　　者：邹丽[1,2] 马鑫宇 李振浩 孙铁志 于宗冰 ZOU Li;MA Xinyu;LI Zhenhao;SUN Tiezhi;YU Zongbing(School of Naval Architecture,Dalian University of Technology,Dalian 116024,China;Collaborative Innovation Center for Advanced Ship and Deep-Exploration,Shanghai 200240,China)

机构地区：[1]大连理工大学船舶工程学院,辽宁大连116024 [2]高技术船舶与深海开发装备协同创新中心,上海200240

出　　处：《哈尔滨工程大学学报》2020年第2期263-270,共8页Journal of Harbin Engineering University

基　　金：国家自然科学基金项目(51522902);工业装备结构分析国家重点实验室自主研究课题(S18408);国防基础科研计划(SXJQR2018WDKT02)

摘　　要：针对内孤立波的波形特征描述,可以采用孤立子模型作为其数学表达。为重现及深入研究孤立子模型,采用不相溶的两层流体,建立小型水槽进行内孤立波生成演化试验,并结合PIV测量技术,实现对其流动特征的捕捉和分析。结果表明:实验工况中速度场呈现顺时针的涡旋形式,上层流体质点运动速度大于下层流体质点运动速度,波谷附近涡量最大。本实验生成的内波与MCC方程的孤立子行波解吻合良好,满足孤立波条件,可为理论内孤立波的伴生流场提供实验依据及特征补充。In view of the characteristics of the inner solitary wave, the isolator model can be used as its mathematical expression. To reproduce and further study the soliton model, we used an insoluble two-layer fluid to establish a small flume for the generation and evolution of solitary waves combined with particle image velocimetry technology to realize the capture and analysis of their flow characteristics. In the experimental conditions, the velocity field presents a clockwise vortex, with the velocity of the fluid particles in the upper layer being higher than that in the lower layer, and the vorticity near the trough being the largest. The internal wave generated in this experiment is in good agreement with the soliton traveling wave solution of the equation and satisfies the condition of an isolated wave. These results provide an experimental basis and characteristic supplement to the associated flow field of the theoretical isolated wave.

关 键 词：内波水槽 分层流体 孤立子 内孤立波 PIV技术 MCC方程 速度场 涡量场 

分 类 号：P76[天文地球—海洋科学]