曳力模型对发送罐内两相流动及出料特性的影响

发布时间：2018-04-15 18:45

本文选题：气力输送 + 曳力模型　；参考：《科学技术与工程》2017年29期

【摘要】：曳力是表征气固相间作用的关键参数,以欧拉双流体模型为基础,以Gidaspow、Syamlal-O'Brien和Huilin曳力模型为研究对象,分析不同曳力模型对罐内两相流动和出料特性的影响。将不同入口气速下的出口质量流量与实验数据进行对比,分析不同曳力模型适用的入口条件。计算结果表明:根据入口速度与模型的匹配度,可将曳力模型划分为三个区间;G区的Gidaspow模型,罐内速度和湍动程度最大并且与实验数据吻合度最高;Syamlal-O'Brien的计算结果略小于Gidaspow模型;只有在S区,Syamlal-O'Brien才与实验值较为吻合;用Huilin模型计算的整体速度和质量流量最小,当速度增大到0.15 m/s以上的h区才与实验结果接近,为发送罐内两相流动的研究提供理论依据。
[Abstract]:Drag force is the key parameter to characterize the interaction between gas and solid. Based on the Euler two-fluid model and the Huilin drag model, the effects of different drag models on the two-phase flow and discharge characteristics in the tank are analyzed.The outlet mass flow rate at different inlet gas velocities is compared with experimental data, and the inlet conditions suitable for different drag models are analyzed.The results show that according to the matching degree between inlet velocity and model, the drag model can be divided into three Gidaspow models in G region. The velocity and turbulence degree in tank is the largest and the result is slightly smaller than that of Gidaspow model.It is only in S region that the value of Syaml al-O 'Brien is in good agreement with the experimental value, and the overall velocity and mass flow rate calculated by Huilin model are the smallest, and when the velocity increases to above 0.15 m / s, the h region is close to the experimental results, which provides a theoretical basis for the study of two-phase flow in the sending tank.
【作者单位】：河北工业大学化工学院过程装备与控制工程系工程流动与过程强化研究中心;天津大学机械学院力学系;天津双兴达环保输送机械有限公司;
【基金】：国家自然科学基金(11572357,11602077)资助
【分类号】：O359

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