Main the Oretical Provisions of Grain Material Separation in Air Channels with Unequal Air Flow Speed
| Autor: | Boris Kotov, Serhii Stepanenko, Electrification |
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| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | National Interagency Scientific and Technical Collection of Works. Design, Production and Exploitation of Agricultural Machines. :122-133 |
| ISSN: | 2664-9136 2414-3820 |
| Popis: | The article considers the increase of efficiency of grain materials separation in pneumatic vertical channels by determining the rational shape and parameters of material supply, as well as the geometric shape of the pneumatic channel and options for separation into fractions. Regularities of change of trajectory and speed of movement of material in pneumatic vertical channels of round section with the lower unloading of material are received. The regularities of particle motion in the form of a material point were determined taking into account air resistance forces, friction forces, Magnus and Zhukovsky forces, material moisture and density based on a theoretical study of grain fractionation in pneumatic vertical channels. Using the proposed dependences for the design of air separators, it is possible to determine the initial rate of introduction and the direction of entry of grains into the air stream, which are the initial conditions for determining the trajectory of material in air channels with lower material discharge. |
| Databáze: | OpenAIRE |
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