Abstract
This paper presents a Computational Fluid Dynamics (CFD) study of droplet spray dispersal in the wake of a Mi-2 helicopter up to 600 m downstream. The Reynolds-averaged Navier-Stokes (RANS) equation use a Lagrangian (droplet phase) and Eulerian (fluid phase) procedure to predict the droplet trajectories trough the turbulent aircraft wake. The methods described have the potential to improve current models for aerial spraying and help in the development of new spraying procedure. In this study, models are developed for the sprays released from atomizers mounted on a helicopter. A parametric study of the aircraft model examines the effects of crosswinds on the helicopter’s vortex structures and the resulting droplet trajectories. The study shows, that such influence is underestimated in the current models. A comparison of our results with those obtained with AGricultural DISPersal (AGDISP) is also presented.
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