Mathematical modeling of the grain material separation in the pneumatic system of the grain-cleaning machine
The article presents the results of a study of a high-performance grain cleaning machine for the preliminary cleaning of grain pile with a closed aspiration system. The flow regimes of the "air-grain pile" mixture determined by the Reynolds number and the bulk concentration of particles ar...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Institut za istrazivanja i projektovanja u privredi
2019-01-01
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| Series: | Istrazivanja i projektovanja za privredu |
| Subjects: | |
| Online Access: | https://scindeks-clanci.ceon.rs/data/pdf/1451-4117/2019/1451-41171904529B.pdf |
| Summary: | The article presents the results of a study of a high-performance grain cleaning machine for the preliminary cleaning of grain pile with a closed aspiration system. The flow regimes of the "air-grain pile" mixture determined by the Reynolds number and the bulk concentration of particles are established. As a result of the modeling, further directions for improving pneumatic systems of grain cleaning machines were determined: the cleaning efficiency of the Е0 fraction of pure grain from light impurities, shriveled and crushed grain reaches 82%, the output cleanliness of the grain was 93.7%, and the loss of full grain to waste Pz = 0,017%. The average speed of the air fl ow in the separating channel is U = 7.12 m/s, its coefficient of variation across the width of the separating channel is v = 12,7%. The results of the experimental data confirmed the adequacy of using mathematical modeling of the air flow in the pneumatic system of a grain cleaning machine to substantiate the basic parameters of the pneumatic system. |
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| ISSN: | 1451-4117 1821-3197 |