Simulation modeling of the cleaning process in a VSG-1 horizontal grain cleaning machine

The paper presents the results of simulation modeling of a VSG-1 horizontal grain cleaning machine, the dependence of the distribution of the air flow velocity and dynamic pressure relative to the geometric dimensions of the inlet and outlet surfaces, boundary conditions are determined, and the expression of the motion of the resulting force particle is presented. Analytical studies show that when the velocity of a particle is close to the air flow, its trajectory gradually decreases. But as the velocity of the particle becomes higher than the velocity of the air flow, its trajectory begins to change, and it moves along a downward trajectory to the horizontal part of the aspiration channel. This happens even if the particle feed rate increases. The dependence of the air flow velocity on the geometric dimensions of the air grain cleaning machine can be described by the law of conservation of energy. Thus, when air moves through a narrow channel (air flow), the velocity accelerates in accordance with the Bernoulli equation. According to this law, the air flow velocity is inversely proportional to the square of the cross-sectional area of the channel. Also, the air flow rate is directly proportional to the pressure difference, that is, if the pressure difference decreases, then the air flow rate increases. The air flow velocity at the inlet of the channel of the VSG-1 horizontal grain cleaning machine under study is 10 m / s, and at the outlet of the aspiration channel (cleaning area) is 8 m / s, while the dynamic pressure at the outlet of the aspiration channel relative to the center of the inlet has a maximum value of 50 Pa, and at the inlet over the entire surface equals to 63 Pa, which provides the lifting force of light impurities.