Abstract: The purpose of this study is to substantiate the design and technological parameters of the grain harvester cleaning system as well as the justification of the air-sieve parameters of the grain heap for implementing the mathematical model for describing the technological process of the grain harvester cleaning system operation. We established the flow regimes of the mixture "Air-grain heap-sieve" and "Air-chaff", determined by the Reynolds number and the volume concentration of polydisperse particles. To calculate these parameters, the method is given for determining the speed of air flow to provide air-sieve cleaning of grain heaps and for the separation of light chaff. As a result, the speed of the air flow was determined to provide pneumatic-sieve separation and uniform distribution over the sieve area for different crops 2.3, , 6.3 m/sec, mass concentration M = 0.102, , 0.474, the volume concentration of grain heap Φ = 9.2•105, , 4.25•104, the Reynolds number of the grain heap is 125, , 1884; The aerodynamic coefficient of resistance of grain heap is 0.19, , 0.59 which are necessary for the implementation of mathematical models of the technological process of the grain harvester cleaning system by the methods of mechanics of two-phase flows.
Ildar I. Gabitov, Ildar D. Badretdinov, Salavat G. Mudarisov, Eduard R. Khasanov, Ramil L. Lukmanov, Ruslan R. Nasyrov, Marat F. Tuktarov, Dinar T. Atnagulov, Ildar A. Timeriashev and Viktor A. Pavlenko, 2018. Modeling the Process of Heap Separation in the Grain Harvester Cleaning System. Journal of Engineering and Applied Sciences, 13: 6517-6526.