A comparison between models for predicting the performances of blunt dust samplers

A need is recognized for greater understanding of the factors which govern the performances of blunt dust sampling devices. This paper compares theoretical models developed from constrasting approaches, the one involving detailed calculation of particle trajectories in well-defined flow fields and the other involving particle transport in flow fields whose shapes are more-loosely defined in terms of the positions of aerodynamic stagnation on the sampler body. It is shown that, over wide ranges of conditions, good agreement can be achieved between the two models.