Abstract As a method for the effective removal of aerosol particles, acoustic agglomeration technology has been widely used in the field of dust removal and defogging. In this study, a coupled Computational Fluid Dynamics and Discrete Element Method model was developed to investigate acoustic agglomeration performance of aerosol droplets in a high-temperature and high-pressure environment. A four-way coupling strategy including flow-parcel and inter-parcel interactions was fully considered. A simple parcel-parcel interaction model was introduced with an elastic coefficient calibrated as 1 × 10−14 kg·s−2. A comprehensive investigation focused on determination of the agglomeration characteristics of droplet aerosols under the action of acoustic waves. The acoustic wave significantly influences the agglomeration behavior of aerosol droplets by changing the acoustic pressure structure in an agglomeration chamber and changing the acoustophoretic force exerted on the droplet. The environmental parameters of operating pressure and ambient temperature indirectly affect the interaction processes of transient flow and aerosol droplets. In general, the results showed better aerosol agglomeration performance in high-temperature and high-pressure environments.

中文翻译：

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基于三维CFD-DEM耦合模型的液滴气溶胶声团聚过程数值研究

摘要 声团聚技术作为一种有效去除气溶胶颗粒的方法，在除尘除雾领域得到了广泛的应用。在这项研究中，开发了一种耦合计算流体动力学和离散元方法模型，以研究高温高压环境中气溶胶液滴的声聚集性能。充分考虑了包括流-包和包间交互的四路耦合策略。引入了一个简单的包裹-包裹相互作用模型，其弹性系数校准为 1 × 10−14 kg·s−2。一项综合研究侧重于确定声波作用下液滴气溶胶的团聚特性。声波通过改变凝聚室中的声压结构和改变施加在液滴上的声泳力来显着影响气溶胶液滴的凝聚行为。工作压力和环境温度等环境参数间接影响瞬态流与气溶胶液滴的相互作用过程。总体而言，结果表明在高温高压环境下具有更好的气溶胶团聚性能。