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首页> 外文期刊>Journal of Aerosol Science >Improving filter capture/cleaning on wet filters and filters collecting liquid aerosols through fibre orientation
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Improving filter capture/cleaning on wet filters and filters collecting liquid aerosols through fibre orientation

机译：改善湿式过滤器和通过纤维定向收集液体气溶胶的过滤器的过滤器捕获/清洁

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When a filter fibre is 'wetted' by a liquid aerosol it usually forms into droplets.A theoretical equation (1) has been developed by the authors,which gives the forces acting on a droplet on a filter fibre:where:(refer Figure 1 for defn.of F and 9 terms);l=2h-a;a is the fibre radius;2h is the distance between fibre axes or the distance between the fibre axis and the edge of the channel,21 is the 'channel' width surrounding each fibre;b is the sphere radius (perpendicular to the fibre at the widest point);U is the face velocity;and mu is the gas viscosity.The term inside the square brackets is Faxen's correction to Stokes' drag equation,and has been applied previously to similar cases (Kirsch 1978).This equation will be applied to an experimental microscopic study of the collection and flow of angled fibres in a model filter.This paper examines (on a microscopic scale) the effect of filter fibre orientation on the collection and motion of liquid aerosols on the fibres.The main aim of this study is to examine the effect of fibre angle (in relation to airflow and gravity directions) on the fibre wetting process. This study is relevant to the collection of low - medium viscosity liquid aerosols on dry filters,and the technology of wet filtration (for aerosol removal),which has proven excellent for the high efficiency collection of sticky/viscous particles,and particles which bounce readily (Mullins et al.2003;Agranovski and Whitcombe 2001).This work builds (in part) on a previous study which examined the effect of angling entire wet filters (Agranovski et al.2002).
机译：当过滤纤维被液体气溶胶“润湿”时，通常会形成液滴。作者已经开发了一个理论方程式（1），给出了作用在过滤纤维上的液滴上的力：对于F和9个项的定义）; l = 2h-a; a是光纤半径; 2h是光纤轴之间的距离或光纤轴与通道边缘之间的距离，21是``通道''宽度每根纤维周围; b是球半径（垂直于最宽处的纤维）; U是面速度; mu是气体粘度。方括号内的术语是Faxen对Stokes阻力方程的校正。以前曾在类似情况下应用过（Kirsch 1978）。该方程式将用于对模型滤嘴中成角度的纤维的收集和流动进行实验性的微观研究。纤维上液体气溶胶的收集和运动。我们的研究是检查纤维角度（与气流和重力方向有关）对纤维润湿过程的影响。这项研究与在干式过滤器上收集低中粘度液体气雾剂以及湿过滤技术（用于去除气雾剂）有关，事实证明，这种技术对于高效收集粘性/粘性颗粒和易反弹的颗粒非常有效。 （Mullins et al.2003; Agranovski and Whitcombe 2001）。这项工作（部分）建立在先前研究的基础上，该研究检查了整个湿式过滤器的倾斜效果（Agranovski et al.2002）。

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