Analysis of Winnow Mechanism on the Basis of Particle-Particle/Particle-Airflow Interaction (Part 1)

Dispersion Characteristics of Paddy Grains/Straws

Abstract

In order to improve the winnowing accuracy, it is important to elucidate the aerodynamic characteristics of grain and the other materials. This study covered paddy, and the dispersion characteristics of grains and straws affected by the cleaning wind were elucidated using test winnower.
The flight grains and straws were photographed, respectively, and the flight range was investigated using the developed image processing system.
Furthermore, when optimum winnowing accuracy was fulfilled, the distribution of mass and shape was investigated.
As a result, the particle coordinates of borderline region were obtained, and the optimum wind velocity could be predicted. In addition, it was considered that the influence on the winnow of project area was larger than that of mass.