Martínez-González Adrian, Guerrero-Viramontes J A, Moreno-Hernández David
Centro de Investigaciones en Óptica A.C., Loma del Bosque 115, Lomas del Campestre, León, Guanajuato, CP37150 Mexico.
Appl Opt. 2012 Jun 1;51(16):3519-25. doi: 10.1364/AO.51.003519.
This paper proposes a combined method for two-dimensional temperature and velocity measurements in liquid and gas flow using a schlieren system. Temperature measurements are made by relating the intensity level of each pixel in a schlieren image to the corresponding knife-edge position measured at the exit focal plane of the schlieren system. The same schlieren images were also used to measure the velocity of the fluid flow. The measurement is made by using particle image velocimetry (PIV). The PIV software used in this work analyzes motion between consecutive schlieren frames to obtain velocity fields. The proposed technique was applied to measure the temperature and velocity fields in the natural convection of water provoked by a heated rectangular plate.
本文提出了一种使用纹影系统对液体和气体流动中的二维温度和速度进行测量的组合方法。通过将纹影图像中每个像素的强度水平与在纹影系统出口焦平面处测量的相应刀口位置相关联来进行温度测量。相同的纹影图像也用于测量流体流动的速度。该测量通过粒子图像测速技术（PIV）进行。本工作中使用的PIV软件分析连续纹影帧之间的运动以获得速度场。所提出的技术被应用于测量由加热的矩形板引起的水的自然对流中的温度和速度场。
