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On the use of infrared thermography in studies with air curtain devices

机译：关于红外热成像在气幕装置研究中的使用

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摘要

Among the different existing methods to characterise the aerodynamic sealing effect provided by an air curtain device placed over the opening between two contiguous compartments, infrared thermography has revealed to be a very useful tool. Besides allowing the capture, in an expedite way, of instantaneous images of the temperature field in the neighbourhood of the door, the technique hereon described has other advantages, in terms of quick and easy setup, low intrusive character and liability of obtained results. To apply this method, a large sheet of paper was stretched in the direction perpendicular to the opening where the air curtain device has placed to allow the registration of pictures or video sequences with an infrared camera setup in its maximum sensitivity. Good concordance between the thermographs obtained with this technique and the temperature fields measured for the same plane with a rack of 16 low velocity omni-directional thermal anemometer probes allowed its validation. Various elucidative examples of the use of this technique as a complementary tool for analysis and visualization of the complex physical phenomena occurring for the studied flow are presented in this article.
机译：在表征由两个相邻隔间之间的开口上方的气幕装置提供的空气动力学密封效果的现有方法中，红外热像仪已被证明是一种非常有用的工具。除了允许以快速的方式捕获门附近的温度场的瞬时图像之外，本文描述的技术还具有其他优点，就其快速和容易的设置，低的侵入特性和获得的结果的可靠性而言。为了应用该方法，在垂直于气幕装置所放置的开口的方向上拉伸了一张大纸，以使其具有最大灵敏度的红外摄像机设置能够记录图片或视频序列。用这种技术获得的温度记录图与使用16个低速全向热风速计探头架在同一平面上测得的温度场之间具有良好的一致性，因此可以对其进行验证。本文介绍了使用该技术作为分析和可视化研究流中复杂物理现象的补充工具的各种说明性示例。

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