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微米级粉煤灰颗粒撞击液体表面的运动行为。

The Motion Behavior of Micron Fly-Ash Particles Impacting on the Liquid Surface.

作者信息

Xie Jun, Li Chenxi, Yang Tianhua, Fu Zheng, Li Rundong

机构信息

School of Energy and Environment, Shenyang Aerospace University, Shenyang 110136, China.

Tangshan Yanshan Iron&Stell Co. Ltd., Qian 'an 064403, China.

出版信息

ACS Omega. 2022 Aug 18;7(34):29813-29822. doi: 10.1021/acsomega.2c02660. eCollection 2022 Aug 30.

DOI:10.1021/acsomega.2c02660
PMID:36061678
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9434615/
Abstract

The motion behavior of particles impacting on the liquid surface can affect the capture efficiency of particles. It was found that there are three kinds of motion behaviors after particle impact on the liquid surface: sinking, rebound, and oscillation. In this paper, the processes of micron fly-ash particles impacting on the liquid surface were experimentally studied under normal temperature and pressure. The impact of fly-ash particles on the liquid surface was simulated by a dynamic model. Based on force analysis, the dynamic model was developed and verified by experimental data to distinguish between three motion behaviors. Then, the sinking/rebound critical velocity and rebound/oscillation critical velocity were calculated by the dynamic model. The critical velocities of particles impacting on the liquid surface under different particle sizes, receding angles, and surface tension coefficients were analyzed. As the particle size increased, sinking/rebound critical velocity and rebound/oscillation critical velocity decreased. As the receding angle increased, sinking/rebound critical velocity remained unchanged, and the rebound/oscillation critical velocity decreased. As the liquid surface tension coefficient increased, sinking/rebound critical velocity and rebound/oscillation critical velocity increased. On this basis, the behaviors of particles impacting on the liquid at low velocity were analyzed.

摘要

颗粒撞击液体表面的运动行为会影响颗粒的捕集效率。研究发现，颗粒撞击液体表面后存在三种运动行为：下沉、反弹和振荡。本文在常温常压下对微米级粉煤灰颗粒撞击液体表面的过程进行了实验研究。采用动力学模型模拟了粉煤灰颗粒对液体表面的撞击。基于受力分析建立了动力学模型，并通过实验数据进行验证，以区分三种运动行为。然后，利用动力学模型计算了下沉/反弹临界速度和反弹/振荡临界速度。分析了不同粒径、后退角和表面张力系数下颗粒撞击液体表面的临界速度。随着粒径的增大，下沉/反弹临界速度和反弹/振荡临界速度减小。随着后退角的增大，下沉/反弹临界速度不变，反弹/振荡临界速度减小。随着液体表面张力系数的增大，下沉/反弹临界速度和反弹/振荡临界速度增大。在此基础上，分析了低速下颗粒撞击液体的行为。

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