Simulation of spray dispersal and deposition from a forestry airblast sprayer-part I: air jet model

摘要

A computational fluid dynamics code (FLUENT) was evaluated for use in modeling the airflow field from round jets, which are characteristic of forestry airblast sprayers. The simulation was compared to turbulent jet theory and validated with data collected from a small centrifugal fan and a commercial forestry airblast sprayer Both two-dimensional (2D) and three-dimensional (3D) schemes were employed. The measured axial and transverse velocity profiles agreed well with the 3D free jet models from FLUENT and turbulent jet theory However FLUENT was superior to turbulent jet theory in predicting asymmetric velocity profiles. The 2D approximations of a round jet using FLUENT and turbulent jet theory were not satisfactory.