搅拌对冰浆存储冰晶粒径演化的影响

发布时间：2018-04-23 04:02

本文选题：储能 + 冰浆　；参考：《中南大学学报(自然科学版)》2017年05期

【摘要】：为研究搅拌作用下冰浆存储过程中冰晶粒径演化的规律,基于冰晶动力学事件核模型,利用Fluent软件、耦合多相流模型与数群平衡模型对冰浆存储过程中冰晶粒径演化进行模拟,将平均粒径模拟值与实验值进行对比分析,并对模型有效性进行验证。基于修正的冰晶动力学事件核模型对搅拌作用下冰浆存储过程中的冰晶粒径演化进行模拟,分析单螺旋桨桨叶直径及位置、双螺旋桨桨叶间距对冰浆存储过程中冰晶体积分数分布、冰晶粒径数量密度分布及冰晶平均粒径演化的影响。研究结果表明:桨叶直径对冰晶体积分数分布、冰晶粒径数量密度分布及冰晶平均粒径均有影响;桨叶间距对冰晶体积分数分布影响显著;双螺旋桨能够使蓄冰槽内冰晶分布更加均匀,更能抑制冰晶粒径增长。
[Abstract]:In order to study the evolution law of ice grain size in ice slurry storage process under agitation, based on ice crystal kinetic event kernel model, the ice grain size evolution in ice slurry storage process was simulated by using Fluent software, coupling multiphase flow model and number group equilibrium model. The simulation value of average particle size is compared with the experimental value, and the validity of the model is verified. Based on the modified ice crystal kinetic event kernel model, the ice grain size evolution in ice slurry storage process under agitation is simulated, and the diameter and position of single propeller blade are analyzed. The effect of propeller blade spacing on the distribution of volume fraction of ice crystal, the distribution of particle size number density and the evolution of ice crystal average particle size during ice slurry storage. The results show that the blade diameter has an effect on the ice crystal volume fraction distribution, the ice grain size number density distribution and the ice crystal average particle size distribution, and the blade spacing has a significant effect on the ice crystal volume fraction distribution. The double propeller can make the ice crystal distribution in the ice storage tank more uniform and restrain the increase of ice grain size.
【作者单位】：中南大学能源科学与工程学院;湖南省建筑节能与环境控制关键技术协同创新中心;
【基金】：国家自然科学基金资助项目(51376198) 湖南省自然科学基金资助项目(11JJ22029)~~
【分类号】：O359

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