A SURVEY AND STUDY OF THE FACTORS WHICH AFFICT THE DUST ENVIRONMENT CREATED BY A VEHICLE OPERATING OVER UNSURFACED TERRAIN

摘要

The purpose of this program was to make a survey and study, from a theoretical viewpoint, of the various factors which affect the dust environment created by a vehicle operating over unsurfaced terrain.nIt was found, theoretically, that the air-flow pattern and the magnitude of the air flow about an operating vehicle have the greatest effect on the dust plume, whereas mechanical movement of soil (dust) particles aid only in introducing the particles into the air stream. The mechanical movement of particles is primarily the result of wheel or track slip. Various aspects of dust particle behavior necessitated the study and interpretation of published literature associated with biological aerosols rather than actual dust particles generated in the field. The mechanics of particle movement in air is presented.