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Temperature and velocity measurement fields of fluids using a schlieren system

机译:使用schlieren系统的流体温度和速度测量场

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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.
机译:本文提出了一种使用谢里尔系统(Schlieren system)进行液体和气体流动二维温度和速度测量的组合方法。温度测量是通过将纹影图像中每个像素的强度级别与在纹影系统的出口焦平面处测得的相应刀口位置相关联来进行的。相同的schlieren图像也用于测量流体流动的速度。通过使用粒子图像测速仪(PIV)进行测量。在这项工作中使用的PIV软件分析连续schlieren帧之间的运动以获得速度场。所提出的技术被用于测量由加热的矩形板激发的水的自然对流中的温度和速度场。

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