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首页> 外文期刊>Advanced Powder Technology: The internation Journal of the Society of Powder Technology, Japan >Prediction of gas-particle dynamics and heat transfer in a two-dimensional spouted bed
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Prediction of gas-particle dynamics and heat transfer in a two-dimensional spouted bed

机译：二维喷射床中气体颗粒动力学和传热的预测

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The aerodynamics of particles and heat transfer of gas-to-particles in a two-dimensional spouted bed (2DSB)with draft plates are investigated by the discrete element method (DEM).The physical properties of the particles are similar to those of shelled corn.The calculated minimum spouting velocity and pressure drop agree well with the empirical correlations proposed by Kudra et al.The particle circulation rate increases when the friction coefficient decreases or the separation height increases.The draft plates can reduce the minimum spouting velocity and pressure drop.They also increase the maximum spoutable bed height.The effect of taking out the draft plates on the spouting phenomenon is investigated.The mixing of a 2DSB without draft plates of 10000 particles is better than that of 26 000 particles.In our simulation,the gas-to-particle heat transfer is investigated.The Ranz-Marshall correlation and the correlation of Sartori et al.are applicable in the spout region and the downcomer region,respectively.The gas-to-particle heat transfer occurs mainly in the central or spout region,as reported by Freitas and Freire.
机译：采用离散元方法（DEM）研究了带有导流板的二维喷水床（2DSB）中颗粒的空气动力学和气体对颗粒的传热，颗粒的物理性质与带壳玉米的相似计算出的最小喷出速度和压降与Kudra等人提出的经验相关性很好。当摩擦系数减小或分离高度增加时，颗粒循环速率增加。防风板可以降低最小喷出速度和压降。它们还增加了最大可喷出床的高度。研究了取出防风板对喷水现象的影响。没有防风板的10000颗粒的2DSB的混合效果优于26 000颗粒的混合。 Ranz-Marshall相关性和Sartori等人的相关性适用于喷口区域和降液管弗雷塔斯和弗雷雷（Freitas）和弗雷雷（Freire）报告说，气体到颗粒的传热主要发生在中央或喷口区域。

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