Motion simulation and test on threshed grains in tapered threshing and transmission device for plot wheat breeding based on CFD-DEM
Keywords:
particle threshing and transmission, tapered threshing and transmission device, hydromechanics calculation, discrete element, numerical simulation, testAbstract
Mechanization of field experiments is the only way to improve crop breeding and seed propagation effects. In order to further clarify and improve the working performance of tapered threshing device for plot breeding, and reduce the remaining seeds in the device, the numerical simulation was carried out on the motion process of materials in the longitudinal-axial tapered cylinder threshing and transmission device of the plot wheat breeding combine harvester based on CFD-DEM method. Simulation results showed that, threshing and transmission of particles and short stalks at axial direction could be realized under the influence of air flow. Meanwhile, the material transference and distribution rule and stream field distribution rule of air flow in the threshing and transmission device were obtained, the variations of velocity and displacement of particles and short stalks with time were obtained; the motion trajectories and forms of particles in different types of retention were also studied. At rotating speed of 1300-1600 r/min for the tapered threshing cylinder in the verification test, the particle retention rate in the enclosure was 0-0.13%, while in the simulation the particle retention rate in the enclosure was 0-0.11%, only a 0.02% difference between them. The results proved a favorable feasibility to simulate the working performance of the tapered threshing and transmission device for plot breeding through gas-solid coupling method. Keywords: particle threshing and transmission, tapered threshing and transmission device, hydromechanics calculation, discrete element, numerical simulation, test DOI: 10.25165/j.ijabe.20191201.4458 Citation: 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.References
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[2] Shang S Q, Yang R B, Yin Y Y, Guo P Y, Sun Q. Current situation and development trend of mechanization of field experiments. Transactions of the CSAE, 2010; 26(Supp.1): 5–8. (in Chinese)
[3] 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.
[4] Dai F, Zhao W Y, Han Z S, Li X K, Gao A M, Liu X L. Improvement and experiment on 4GX-100 type wheat harvester for breeding plots. Transactions of the CSAM, 2016; 47(s1): 196–202. (in Chinese)
[5] 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.
[6] Miu P I. Modeling and simulation of grain threshing and separation in axial threshing units. Part II. Computers and Electronics in Agriculture, 2008; 60(2): 105–109.
[7] Bart L, Bart M, Josse D B, Wouter S, LiDaR sensing to monitor straw output quality of a combine harvester. Computers and Electronics in Agriculture, 2012; 85(1): 40–44.
[8] Chang J G, Liu X B, Ye T, Du M J. Agricultural plot field trial breeding status and development of machinery. Journal of Agricultural Mechanization Research, 2011; 33(2): 238–241. (in Chinese)
[9] Dai F, Zhang F W, Gao A M, Han Z S. Optimization of key operating parameters in 4GX-100 type cropland plot wheat seed combine harvester. Transactions of the CSAE, 2012; 28(Supp.2): 53–58.
[10] 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.
[11] Zhao Z, Li Y M, Liang Z W, Gong Z Q. DEM simulation and physical testing of rice seed impact against a grain loss sensor. Biosystems Engineering, 2013; 116: 410–419.
[12] Liu H X, Guo L F, Fu L L, Tang S F. Study on multi-size seed-metering device for vertical plate soybean precision planter. Int J Agric & Biol Eng, 2015; 8(1): 1–8.
[13] Boac J M, Ambrose R P K, Casada M E, Maghirang R G, Maier D E. Applications of discrete element method in modeling of grain postharvest operations. Food Engineering Reviews, 2014; 6(4): 128–149.
[14] Oldal I, Safranyik F. Extension of silo discharge model based on discrete element method. Journal of Mechanical Science & Technology, 2015; 29(9): 3789–3796.
[15] Kuang S B, Yu A B, Zou Z S. Computational study of flow regimes in vertical pneumatic conveying. Industrial & Engineering Chemistry Research, 2009; 48(14): 6846–6858.
[16] He Y, Bayly A E, Hassanpour A L. Coupling CFD-DEM with dynamic meshing: A new approach forfluid-structure interaction in particle-fluid flows. Powder Technology, 2018; 325: 620–631.
[17] 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)
[18] 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)
[19] Wang J W, Zhou W Q, Tian L Q, Li S W, Zhang Z. Virtual simulation analysis and verification of seed-filling mechanism for dipper hill-drop precision direct rice seeder. Int J Agric & Biol Eng, 2017; 10(6): 77–85.
[20] Tong S G, Shen Q, Tang N, Jia Y P, Cong F Y, Gu W. Numerical simulation and optimization experiment of mixed flow field on longitudinal axial flow cleaning device. Transactions of the CSAM, 2016; 47(7): 135–142. (in Chinese)
[21] Chu K W, Wang B. CFD-DEM simulation of the gas-solid flow in a cyclone separator. Chemical Engineering Science, 2011; 66(5): 834–847.
[22] Dai F, Han Z S, Zhang F W, Gao A M, Sun B G. Experiment on longitudinal axial conical cylinder threshing separation unit for plot breeding. Agricultural Research in the Arid Areas, 2012; 30(3): 274–278. (in Chinese)
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Published
2019-02-01
How to Cite
Dai, F., Song, X., Zhao, W., Han, Z., Zhang, F., & Zhang, S. (2019). Motion simulation and test on threshed grains in tapered threshing and transmission device for plot wheat breeding based on CFD-DEM. International Journal of Agricultural and Biological Engineering, 12(1), 66–73. Retrieved from https://ijabe.migration.pkpps03.publicknowledgeproject.org/index.php/ijabe/article/view/4458
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Power and Machinery Systems
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