Abstract A technique for studying heat transfer in a rotary drum is proposed using infrared (IR) thermography, which is used to record images to give instantaneous thermal data. In this work, the calibration procedure and methodology used to extract temperatures of the particles and the drum wall from the IR camera is discussed. The technique provides insightful information on the flow regimes and heat transfer for varying drum fill levels and rotation rates. The flow profile of the particle bed for each run is analyzed both theoretically using Froude number and experimentally using recorded IR images. The results suggest that the flow of particles is influenced by particle-particle friction in the presence of heat transfer. A transition in the flow profile is observed as time progresses and the bed reaches a surging regime. Higher rotation rates result in maximum average bed temperatures, whereas fill level does not have a conclusive effect.

中文翻译：

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使用红外热像仪对转鼓中的传导传热进行实验研究

摘要 提出了一种使用红外 (IR) 热成像技术研究转鼓中传热的技术，该技术用于记录图像以提供瞬时热数据。在这项工作中，讨论了用于从红外摄像机中提取颗粒和滚筒壁温度的校准程序和方法。该技术提供了有关不同鼓填充水平和旋转速率的流态和热传递的深入信息。使用弗劳德数从理论上和实验上使用记录的 IR 图像对每次运行的颗粒床的流动剖面进行分析。结果表明，在存在热传递的情况下，颗粒的流动受到颗粒-颗粒摩擦的影响。随着时间的推移和床达到喘振状态，观察到流动剖面的转变。