Numerical Simulation and Experimental Study of Thermal Distribution Behavior in Downdraft Ceramic Kiln

Tạp chí Giáo dục Kỹ thuật Pub Date : 2023-08-28 DOI:10.54644/jte.78b.2023.1440

Chartchai Dechpratoom, Arpiruk Hokpunna, Pracha Yeunyongkul, Ronnachart Munsin, Thanawat Watcharadumrongsak, Korawat Wuttikid

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Abstract

This research aims to study and analyze thermal distribution behavior in 3.6 m3 downdraft kiln containing standard 10 layers and 250 kg ceramic shelf. This understanding is expected to solve the waste product problem of stoneware ceramic affected by uneven inside temperature. Thermal distribution was analyzed by thermocouple measuring simultaneously CFD method. Regularly, R - type thermocouples measurements were permanently installed for 8 points around the kiln, front middle and rear top, door, mid - rear wall, side wall, chimney and burner. These measuring results compared to CFD show the trend. The temperature on the top kiln was higher than that bottom. The average temperature on the top kiln was around 1,160°C whereas that on the bottom kiln was around 850°C. The CFD results were error from thermocouple measuring for -2 to 5%. However, CFD results also show thermal distribution behavior at the immeasurable point from thermocouple. The temperature distribution on the bottom kiln was uneven. The temperature nearby the front kiln was slightly lower than that rear kiln because the outlet vent to the chimney is near rear kiln.

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下吸式陶瓷窑热分布特性的数值模拟与实验研究

本研究旨在研究和分析3.6 m3含标准10层和250 kg陶瓷架子的下风窑的热分布行为。这种认识有望解决因内部温度不均匀而影响的陶瓷废料问题。采用热电偶同步测量CFD方法分析了热分布。窑的前后顶、炉门、中后墙、侧壁、烟囱、燃烧器周围8个点固定安装R型热电偶测量。将这些测量结果与CFD进行比较，显示出趋势。窑顶的温度比窑底的温度高。上窑的平均温度约为1160°C，而下窑的平均温度约为850°C。热电偶测量的CFD结果误差为-2 ~ 5%。然而，CFD结果也显示了热电偶在不可测点处的热分布行为。窑底温度分布不均匀。由于烟囱出口靠近后窑，前窑附近温度略低于后窑。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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