Showing papers by "Annele Virtanen published in 1999"
TL;DR: In this article, a new method for measuring collection characteristics of cascade impactors is described, which is based on challenging the impactor with monodispersed charged particles and measuring electrical currents on all the impactors stages plus a backup filter.
38 citations
4 citations
Patent•
26 Jan 1999
TL;DR: In this paper, a method for minimising Coulombic losses in impactors and an impactor was proposed, in which the Coulombics losses have been minimised by placing an electricity conductive surface (70) between the insulator (24) and the flow (21).
Abstract: The subject of the invention is a method for minimising Coulombic losses in impactors and an impactor, in which the Coulombic losses have been minimised. The method according to the invention is based on restricting the force effect of the charges accumulated in impactor's insulators (24) on the charged particles. This restriction of the force effect can be realized, for example, by placing an electricity conductive surface (70) between the insulator (24) and the flow (21), or by forming an insulator (24) so that the force effect is minimised.
4 citations
3 citations