光学在内波实验研究中的应用  

Application of Optics to Internal Wave Experimental Research

作　　者：徐肇廷[1] 于佳[1] 王伯雄[2] 

机构地区：[1]中国海洋大学海洋环境学院物理海洋实验室,山东青岛266003 [2]清华大学精密仪器系,北京100081

出　　处：《中国海洋大学学报（自然科学版）》2007年第6期861-867,共7页Periodical of Ocean University of China

基　　金：国家自然科学基金项目(40576010)资助

摘　　要：内波的实验室模拟是目前物理海洋学和流体力学研究的热点之一。结合实验室内波的模拟实验,近代光学技术、数字图像获取和计算机数据处理技术及三者相结合的技术,介绍内波实验中流场图像化测量领域的研究进展。同时对传统的纹影仪(横式)、立式纹影仪、数字纹影仪和片光源染料粒子示踪技术进行综述。并比较了各自特点及其在内波研究中的优缺点。Laboratory experiment of internal waves is one of the hotspots in present physical oceanography and fluid mechanics study. Optical technology combined with digital image capturing and processing methods used in the visualization and measurement of laboratory generated internal waves is discussed. Novel techniques for producing qualitative visualizations of density fluctuations and for obtaining quantitative whole-field density measurements in two-dimensional stratified flows are discussed in detail. These techniques, which utilize image processing technology, are much simpler to set up, and provide useful information in situations where shadow-graph is of little or no value. Moreover, they may be set-up to analyze much larger domains than is feasible with the classical approaches. Synthetic schlieren, large-scale vertical schlieren and PIV （Particle Image Velocimeter） with laser-induced fluorescent dye particle technology are introduced and compared in detail according to their characteristics in laboratory experiment of internal waves, and their advantages and shortcomings are discussed.

关 键 词：内波实验 纹影仪 数字纹影仪 PIV技术 激光染料示踪粒子技术 

分 类 号：P714[天文地球—海洋科学]