Migration law of flax threshing materials in double channel air-and-screen separating cleaner
Keywords:
flax threshing materials, separation cleaner, air-and-screen, gas-solid coupling, discrete element model, numerical simulationAbstract
In order to further clarify and improve the working performance of separating cleaner for flax threshing materials, and study the migration law and characteristics of components of flax threshing materials during separating and cleaning, in this paper, a gas-solid coupling simulation model was established on the separation cleaner for flax threshing materials and a numerical simulation was carried out on the separating and cleaning process. Simulation results showed that, the separating and cleaning effect of the components of flax threshing materials was good under the air-and-screen gas-solid coupling flow field. Meanwhile, the form distribution and the vector distribution of air volume and velocity of flax threshing materials in the air-and-screen devices were obtained. By referring to the migration trajectories of the flax threshing materials in the vibration sieve device, double channel residue collection device and dust absorber, the volume variation, motion trajectories and variation of migration velocity of the components of flax threshing materials over time in different regions were explored. Verification test results showed that, the content impurity rate of the separation cleaner for flax threshing materials was 2.06%, and loss rate in cleaning was 3.08%. Compared with simulation results, the verification test results were 1.23% and 0.42% higher, showing that the established discrete element model on the flax threshing materials and parameter setting were basically feasible. The verification test also verified the correctness of the simulation results of the separating and cleaning process of the flax threshing materials based on gas-solid coupling theory and the feasibility of the research method. Keywords: flax threshing materials, separation cleaner, air-and-screen, gas-solid coupling, discrete element model, numerical simulation DOI: 10.25165/j.ijabe.20211403.6058 Citation: Dai F, Song X F, Shi R J, Zhao W Y, Guo W J, Zhang Y. Migration law of flax threshing materials in double channel air-and-screen separating cleaner. Int J Agric & Biol Eng, 2021; 14(3): 92–102.References
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[2] Li H C, Li Y M, Gao F, Zhao Z, Xu Li Z. CFD-DEM simulation of material motion in air-and-screen cleaning device. Computers and Electronics in Agriculture, 2012; 88(6): 111–119.
[3] Dai F, Song X F, Zhao W Y, Han Z S, Zhang F W, Zhang S L. Motion simulation and test on threshed grains in tapered threshing and transmission device for plot wheat breeding based on CFD-DEM. Int J Agric & Biol Eng, 2019; 12(1): 66–73.
[4] He Y, Bayly A E, Hassanpour A L. Coupling CFD-DEM with dynamic meshing: A new approach for fluid-structure interaction in particle-fluid flows. Powder Technology, 2018; 325: 620–631.
[5] Cleary P W. DEM simulation of industrial particle flows: case studies of dragline excavators, mixing in tumblers and centrifugal mills. Powder Technology, 2000; 109(1-3): 83–104.
[6] Wang L J, Feng X, Zheng Z H, Yu Y T, Liu T H, Ma Y. Design and test of combined sieve of maize screening. Transactions of the CSAM, 2019; 50(5): 104–113. (in Chinese)
[7] Gebrehiwot M G, Baerdemaeker J, Baelmans M. Numerical and experiment study of a cross-flow fan for combine cleaning shoes. Biosystems Engineering, 2010; 106(4): 448–457.
[8] Jiang E C, Sun Z F, Pan Z Y, Wang L J. Numerical simulation based on CFD-DEM and experiment of grain moving laws in inertia separation chamber. Transactions of the CSAM, 2014; 45(4): 117–122. (in Chinese)
[9] Dai F, Zhao W Y, Song X F, Shi R J, Liu G C, Wei B. Parameter optimization and experiment on separating and cleaning machine for flax threshing material. Transactions of the CSAM, 2020; 51(7): 100–108. (in Chinese)
[10] Liu L Y, Hao S Y, Zhang M, Liu D M, Jia F G, Quan L Z. Numerical simulation and experiment on paddy ventilation resistance based on CFD-DEM. Transactions of the CSAM, 2015; 46(8): 27–32. (in Chinese)
[11] Ma L C, Wei L B, Pei X Y, Zhu X S, Xu D R. CFD-DEM simulations of particle separation characteristic in centrifugal compounding force field. Powder Technology, 2019; 343: 11–18.
[12] Dai F, Song X F, Guo W J, Zhao W Y, Zhang F W, Zhang S L. Simulation and test on separating cleaning process of flax threshing material based on gas-solid coupling theory. Int J Agric & Biol Eng, 2020; 13(1): 73–81.
[13] Wang S Y, Li H L, Wang R C, Wang X, Tian R C, Sun Q J. Effect of the inlet angle on the performance of a cyclone separator using CFD-DEM. Advanced Powder Technology, 2019; 30(2): 227–239.
[14] Tang Z, Li Y M, Xu L Z, Francis K. Modeling and design of a combined
transverse and axial flow threshing unit for rice harvesters. Spanish Journal of Agricultural Research, 2014; 12(4): 973–983.
[15] Li Y, Xu L Z, Zhou Y, Si Z Y, Li Y M. Effect of extractions feed-quantity on airflow field in multi-ducts cleaning device. Transactions of the Chinese Society of Agricultural Engineering, 2017; 33(12): 48–55. (in Chinese)
[16] Wang L J, Wu Z X, Feng X, Li R, Yu Y T. Design and experiment of curved screen for maize grain harvester. Transactions of the CSAM, 2019; 50(2): 90–101. (in Chinese)
[17] Peng Z B, Doroodchi E, Moghtaderi B, Evans G M. A DEM-based analysis of the influence of aggregate structure on suspension shear yield stress. Advanced Powder Technology, 2012; 23(4): 437–444.
[18] Fu J, Chen Z, Tian L Q, Han L J, Ren L Q. Review of grain threshing theory and technology. Int J Agric & Biol Eng, 2018; 11(3): 12–20.
[19] Jin X, Du X W, Gan BX, Ji J T, Dong X, Wang G X. Cleaning performance experiment of cyclone separating system in miniature combine harvester. Transactions of the CSAM, 2016; 47(5): 99–105. (in Chinese)
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Published
2021-06-11
How to Cite
Dai, F., Song, X., Shi, R., Zhao, W., Guo, W., & Zhang, Y. (2021). Migration law of flax threshing materials in double channel air-and-screen separating cleaner. International Journal of Agricultural and Biological Engineering, 14(3), 92–102. Retrieved from https://ijabe.migration.pkpps03.publicknowledgeproject.org/index.php/ijabe/article/view/6058
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Power and Machinery Systems
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