Assessing the Adequacy of Mathematical Models of Light Impurity Fractionation in Sedimentary Chambers of Grain Cleaning Machines

Grain heap contains high-grade grain, weed and grain impurities. At the preliminary stage of grain processing, it is necessary to clean the grain heap and allocate the fraction of light waste grain impurities which are a valuable food for farm animals. This paper proposes a technical solution for the implementation of this process and derives a mathematical model thereof. The authors analyze the modeled process of grain impurities allocation from the fraction of light waste sediment in the area of the suction port flow fan. The results of modeling are verified by comparison to experimental data. It is found out that the results of theoretical studies fit the +/- 10% tolerance of the experimental data difference. The agreement between the theoretic generated and the experimental results on the hypothesis on the samples belonging to the same general population based on the sign test is considered acceptable. The resultant mathematical model adequately describes the process of fractionation of light waste in the sedimentary area of the suction chamber in diametrical fan window. (C) 2016 The Authors. Published by Elsevier Ltd.