Design of Positive Pressure Re-Acceleration Assisted Seeding Mechanism for Corn Based on CFD-EDEM Gas-Solid Coupling Simulation

Liwei Li, Guangwei Wu, Zhijun Meng, Yuejin Xiao, Yanxin Yin, Bingxin Yan () and Chunjiang Zhao ()
Additional contact information
Liwei Li: School of Mechanical and Electrical Engineering, Shihezi University, Shihezi 832003, China
Guangwei Wu: National Engineering Research Center for Intelligent Agricultural Equipment, Beijing 100097, China
Zhijun Meng: National Engineering Research Center for Intelligent Agricultural Equipment, Beijing 100097, China
Yuejin Xiao: National Engineering Research Center for Intelligent Agricultural Equipment, Beijing 100097, China
Yanxin Yin: National Engineering Research Center for Intelligent Agricultural Equipment, Beijing 100097, China
Bingxin Yan: National Engineering Research Center for Intelligent Agricultural Equipment, Beijing 100097, China
Chunjiang Zhao: School of Mechanical and Electrical Engineering, Shihezi University, Shihezi 832003, China

Agriculture, 2024, vol. 14, issue 11, 1-26

Abstract: This study proposes a positive pressure re-acceleration assisted seeding mechanism and analyzes the motion mechanism of corn seeds during the seeding process. By employing the CFD-EDEM gas-solid coupling simulation analysis method, the fluid characteristics, initial ejection velocity of seeds, seed dropping time difference, and sowing position difference in the seeding mechanism under different structural parameters of the air pressure valve body were investigated. The optimal structural parameters of the air pressure valve body were determined (nozzle gap c = 0.6 mm, throat constriction diameter d = 16 mm, and throat constriction length l = 44 mm). A multi-factor experimental method was used to explore the effects of airflow pressure, forward speed during sowing, and sowing distance on sowing performance, aiming to identify the optimal working parameters for the positive pressure re-acceleration seeding mechanism. High-speed camera technology was used to record and analyze the seed movement process. The results indicate that an increase in positive pressure within the seed guide tube shortens the sowing time of corn seeds, reduces the coefficient of variation of seed dropping time difference, and effectively improves the consistency of sowing distance. The optimal parameters are a forward speed of 8 km/h, sowing distance of 20 cm, airflow pressure of 10 kPa, with a sowing distance coefficient of variation of 7.56%, and a seed dropping time difference coefficient of variation of 5.35%.

Keywords: CFD-EDEM; airflow field; air-flow assisted seeding; bench test; high-speed camera; plant spacing coefficient of variation (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2024
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/2077-0472/14/11/1927/pdf (application/pdf)
https://www.mdpi.com/2077-0472/14/11/1927/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jagris:v:14:y:2024:i:11:p:1927-:d:1509580

Access Statistics for this article

Agriculture is currently edited by Ms. Leda Xuan

More articles in Agriculture from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().