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化工学报  2015 

局部强内热源移动球床温度分布特性

DOI: 10.11949/j.issn.0438-1157.20150306, PP. 117-122

Keywords: 内热源,移动球床,温度分布

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Abstract:

球形颗粒的运动速度与局部强内热源移动球床通道内温度分布有着必然联系。通过理论推导分别得到了含有强内热源移动球床中球形颗粒运动速度与加热区出口和通道出口平均温度之间的关联式。运用数值方法获得了含有局部强内热源移动球床三维模型的温度分布,通道出口温度的数值结果与理论关联式计算结果吻合良好,两者相对误差小于8%。在此基础上,进一步对比分析了3种不同运动速度下的内热源加热区出口温度、球床通道中心温度和出口温度的分布特点。通道中心温度沿颗粒运动方向先升高后降低,最高温度出现在加热区出口处。随着颗粒运动速度增大,内热源加热区出口温度、通道出口温度和通道中心温度逐渐降低且径向温度梯度也随之减小。

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