Anisokinetic sampling of aerosols at a slot intake

Sampling Errors in Cylindrical Nozzles

“…for thin-walled axisymmetric and two-dimensional probes of finite dimensions facing the wind. Later, similar calculation methods were developed by Kaslow and Emrich (1974), Agarwal and Liu (1980), and Addlesee (1980). It was shown that the inertial aspiration coefficient can be determined from the characteristics of a limiting trajectory tube having cross-section S, far from the inlet: where u, is the mean gas velocity in the atmosphere undisturbed by aspiration, and Q is the volumetric gas sampling flow rate.…”

“…A('). r Up to now, most theoretical aspiration process studies have been aimed at determining the inertial aspiration coefficient only (e.g., Levin, 1961;Kaslow and Emrich, 1974;Voloshchuk, 1971;Addlesee, 1980;Agarwal and Liu, 1980). As for most experimental research workers, they have not differentiated between A?)…”

The Effects of Turbulence on the Entry of Airborne Particles into a Blunt Dust Sampler

“…This is particularly so in view of the fact that practical dust sampling frequently takes place in turbulent air. Even in reports where the question of turbulence is raised (for example, by McFarland et al, 1977, Ogden and Birkett, 1978, Addlesee, 1980, Jayasekera and Davies, 1980, and Ralph et al, 1982, the treatment is not very comprehensive. In this paper, we extend simple blunt sampler theory , Vincent, 1984 to allow examination of the effects of freestream turbulence.…”

The Nature of Air Flow Near Aerosol Samplers

“…Relatively straightforward solutions for the flow near a two-dimensional thin-walled slot have been obtained by a number of workers (Volushchuck and Levin, 1968;Bartak, 1974;Addlesee, 1980). This is because, for these systems at this orientation, the wall of the sampler itself does not present any physical cross-section (or blockage) to the approaching flow.…”