固液两相声共振混合数值模拟  

Simulation of resonant acoustic mixing of liquid-solid-phase

作　　者：张毅铭 马宁[2] 王小鹏[1] 陈天宁[1] 

机构地区：[1]西安交通大学机械结构强度与振动国家重点实验室,陕西西安710049 [2]西安近代化学研究所氟氮化工资源高效开发与利用国家重点实验室,陕西西安710065

出　　处：《化工进展》2018年第3期913-919,共7页Chemical Industry and Engineering Progress

基　　金：国防科技工业基础产品创新计划火炸药科研专项

摘　　要：声共振混合作为一种解决力/热敏感超细材料均匀分散混合问题的新方法,其技术特点是混合容器工作在共振状态下使用不超过200Hz的振动产生低频声场促进混合。本文采用气固液三相流模型对一种固体、一种液体在声共振混合容器中的混合过程进行建模。固体颗粒与液体之间相互作用系数采用Gidaspow公式。采用固体颗粒体积分数标准偏差作为标准对混合均匀性进行了评价。计算结果表明,在100g振动加速度下容器中出现了体流现象,并初步计算了不同高宽比、不同激振参数条件下的混合特性,对计算结果进行了分析。最后利用自搭建的声共振混合样机,分别在低固含量、高固含量条件下进行实验,记录混合过程中固体颗粒的运动轨迹。实验结果初步验证了仿真模拟的正确性以及声共振样机的混合能力。Resonance acoustic mixing is a new method to solve the problem of uniform dispersion of the force/heat sensitive ultra-fine materials. The technical feature of this technology is that the mixing vessel is working in a resonant state and uses a vibration at a frequency less 200 Hz to produce a low frequency sound field to promote mixing. In this paper,a solid-liquid three-phase flow model was used to model the mixing process of a solid liquid in an acoustic resonant mixing vessel. The interaction coefficient between solid particles and liquid is Gidaspow＇s formula. The mixing uniformity was evaluated by using the standard deviation of the volume fraction of solid particles. The results showed that the bulk flow phenomenon occurred in the vessel with 100 g vibration acceleration,and the mixing characteristics under different aspect ratios and different excitation parameters were calculated. The calculation results were analyzed. Finally,the experiments were carried out under low and high solid volume fractions,and the tracks of solid particles in the mixing process were recorded. The experimental results verify the correctness of the simulation and the mixing ability of the resonant acoustic mixing prototype.

关 键 词：声共振混合 振动 多相流 混合 数值模拟 

分 类 号：TQ56[化学工程—炸药化工]