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Refining the method for determining the flow rate of air entrained by freely falling polydisperse loose material
Powder Technology ( IF 5.2 ) Pub Date : 2020-08-01 , DOI: 10.1016/j.powtec.2020.06.055
I.N. Logachev , E.N. Popov , K.I. Logachev , O.A. Averkova

Abstract Air entrainment by a flow of loose material is the primary cause of dust releases during handling of such materials. Computing the flow rate of air ejected by the material is a prerequisite for ventilation system design. An additional consideration is that mining industries normally handle polydisperse materials. The goal of our study is to design a method for computing the flow rate of air entrained by dry loose material while accounting for its particle-size distribution. We rely on a phenomenological method as we describe an interpenetrating continuum, “falling particles – air”. We propose a probabilistic approach for determining the aerodynamic drag coefficient for freely falling particles of polydisperse material. A differential equation is obtasined for air entrained by this material. The effect of particle-size distribution of the material being handled is considered together with methods for determining the average particle diameter on the flow rate of ejected air.

中文翻译:

自由落体多分散松散物料夹带空气流量测定方法的改进

摘要 松散材料流中的空气夹带是在处理此类材料过程中产生粉尘的主要原因。计算材料喷出的空气流量是通风系统设计的先决条件。另一个考虑因素是采矿业通常处理多分散材料。我们研究的目标是设计一种计算干燥松散材料夹带空气流速的方法,同时考虑其粒度分布。当我们描述一个相互渗透的连续体“下落的粒子 - 空气”时,我们依赖于一种现象学方法。我们提出了一种概率方法来确定自由下落的多分散材料颗粒的气动阻力系数。对于这种材料夹带的空气,获得了一个微分方程。
更新日期:2020-08-01
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