2002 Volume 64 Issue 3 Pages 45-50
This study carried out an analysis of air flow in grain separation tunnel under the condition of no material to be separated in order to understand the flow of separation-wind. As the result of a visual experiment using water model which is replaced air with water, the flow pattern of separation-wind from the main separation fan to the suction fan was made clear. An inverse flow at a suction and an exhaust sides of the suction-fan for dust was observed. For stabilization of the flow the shape of the suction fan case was improved using the water model. Improvement of the shape of the case result in larger discharge and pressure coefficients than the current suction fan, and the maximum efficiency increased about five times.
