Inertial impactors are widely used instruments for measuring aerosol size distributions. The difficulties caused by the bleed flow and the apparent success of the jet-cone impactors led us to examine the collection of particles in a quiescent cavity with no flow through the orifice. The primary objective is to develop an impaction substrate that can be used in conventional multistage impactors without grease or complicated plumbing and metering of secondary flows. This paper presents an experimental evaluation of particle trap impactors. The first part explores the collection efficiency characteristics as a function of geometric and flow parameters, including operation at the high jet velocities that would be necessary for the classification of particles smaller than 0. 1 micron. In the second part, we report on the design and performance of a high temperature particle trap impactor.
|Original language||English (US)|
|Number of pages||4|
|State||Published - 1986|
ASJC Scopus subject areas