MRI/RUI: Acquisition of a Digital Particle Image Velocimetry System for the Study of Turbulent Flows

新泽西学院的工程系寻求通过获取最先进的技术来为研究和学习奠定基础。数字粒子图像测速系统的加入将极大地多样化和增强现有的可供教职员工和学生使用的资源基础设施。数字粒子图像测速仪已经成为工业和研究领域流动诊断技术的标准。这项技术的主要吸引力在于能够以令人难以置信的精度、分辨率和速度量化平面或三维速度场。该系统的核心部分包括一个双探头脉冲Nd：YAG激光器、高分辨率的CCD数字采集组件和一个控制所有采集和数据处理功能的软件接口。在获得DPIV系统后，学院将开展两项主要活动：开发能够解决行业和社会面临的与湍流驱动现象相关的问题的研究计划，以及包括加强本科实验室和流体力学课程以及增加本科生参与研究的教育改进计划。研究计划的具体重点领域最初将侧重于湍流产生的噪声和湍流多相流的量化。多相流研究涉及的问题将包括气泡与湍流的相互作用以及工业中感兴趣的颗粒扩散问题。使用DPIV，可以直接计算控制湍流输运方程的单项，以便识别主导源项。此外，还可以直接观察到粒子的运动和分布。将DPIV系统引入本科实验室和流体力学课程将使学生能够对大量流体现象有更深入的物理了解。理论与设计的融合是学院学生接受均衡的工程教育的基石之一。通过使用DPIV等流程诊断工具来评估原型和测试创新概念，几个学生高级设计项目的质量将大大提高。

The engineering department at The College of New Jersey seeks to build a foundation for research and learning through the acquisition of state-of-the-art technologies. Addition of a Digital Particle Image Velocimetry system will greatly diversify and enhance the current infrastructure of resources available to faculty and students. Digital Particle Image Velocimetry has become a standard in flow diagnostic techniques in industry and research sectors. The primary attractiveness of this technique lies in the ability to quantify planar or three-dimensional velocity fields with incredible accuracy, resolution, and speed. The heart of the system consists of a dual head pulsed Nd:YAG laser, high resolution CCD digital acquisition package, and a software interface that controls all acquisition and data processing functions. Two main activities will be generated at the College upon acquisition of the DPIV system: development of a research program capable of addressing issues faced by industry and society related to turbulence-driven phenomena and an educational improvement plan consisting of the enhancement of undergraduate laboratories and fluid mechanics courses and increased involvement of undergraduates in research.Specific thrust areas to be targeted by the research program will initially focus on noise generation due to turbulent flow and the quantification of turbulent multiphase flows. Issues addressed by the multiphase flow studies will include bubble interactions with turbulence and particle dispersion problems of interest to industry. Using DPIV, individual terms of the governing turbulent transport equations can be directly calculated so that the dominant source terms can be identified. In addition, particle motions and distributions can be directly observed. These capabilities can ultimately lead to validation of complex numerical models.Incorporation of a DPIV system into undergraduate laboratories and fluid mechanics courses will allow students to gain deeper physical insight into a host of fluid phenomena. Integration of theory and design is one of the cornerstones of the well- balanced engineering education received by students at the College. The quality of several student senior design projects will be greatly enhanced through access to a flow diagnostic tool such as DPIV for evaluating prototypes and testing innovative concepts.