MRI-R2: Acquisition of a Volumetric 3-Component Velocimetry (V3V) System

0958668 Lang“该奖项是根据2009年美国复苏和再投资法案（公法111-5）资助的。亚拉巴马大学（UA）工程学院的一个由五名教师组成的积极从事流体动力学研究的团队提议购买TSI V3 V测量系统。与平面二维甚至立体粒子图像测速（PIV）系统相比，V3 V系统是独一无二的，因为它能够测量整个流体体积内的瞬时三分量速度矢量场。该仪器使用一个由三个摄像头组成的系统来跟踪单个颗粒的三维坐标;然后将数据插值到规则间隔的笛卡尔网格上。因此，其他三维流动特性（如涡量，局部应变率和雷诺应力）很容易从测量计算。该系统的主要优点是能够完全捕获时空速度场，同时与平面DPIV相比仅需要有限的光学访问，从而可以更深入地了解拟议研究的流动物理学。美国大学将是东南部第一所购买这种最先进系统的大学，也将成为全国不到十所购买这种系统的大学之一。V3 V的收购将使教师团队，结合了23年的经验，使用平面PIV系统，约60年的激光技术，以及80多年的光学测量技术，形成一个新的，积极的工作组，专注于实验流体，空气动力学，燃烧和发动机（eFACE工作组）的光学诊断技术。V3 V将为新成立的工作协作提供基础设施基石。

0958668Lang"This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5)." A team of five faculty actively engaged in fluid dynamics research from the College of Engineering at the University of Alabama (UA) proposes to acquire a TSI V3V measurement system. The V3V system is unique, compared to planar two-dimensional and even stereoscopic particle image velocimetry (PIV) systems, because it is capable of measuring the instantaneous three-component velocity vector field within an entire fluid volume. The instrument uses a system of three cameras to track the three-dimensional coordinates of individual particles; the data are then interpolated onto a regularly spaced Cartesian grid. As a result, other three-dimensional flow properties (such as vorticity, local strain rates, and Reynolds stresses) are easily calculated from the measurements. The major advantage of the system is its ability to fully capture the velocity field spatio-temporally while only requiring limited optical access as compared to planar DPIV, thus allowing for greater insight into the flow physics for the proposed studies. UA would be the first university in the Southeast to purchase this state-of-the-art system and would become one of less than ten in the country to acquire one. The acquisition of the V3V will enable the faculty team, which has combined experience of 23 years using planar PIV systems, about 60 years with laser-based techniques, and over 80 years with optical measurement techniques, to form a new, active working group that focuses on optical diagnostic techniques in experimental fluids, aerodynamics, combustion and engines (eFACE Working Group). The V3V will provide the infrastructure cornerstone of the newly formed working collaboration.