Author(s)

Dejian Li ¹

Affiliation(s)

¹ School of Mechanical Engineering, University of Jinan, Jinan 250022, China

Corresponding Author

Dejian Li

ABSTRACT

Aiming at the structure of the single air duct centrifugal fan in the existing full-feed grain combine harvester air sieve cleaning device, the flow channel model of the single air outlet single air duct centrifugal fan was established, and the mesh was partitioned using the MESHING software. And using CFD (Computational Fluid Dynamics) software to carry out three-dimensional numerical simulation of the internal flow field of the single-outlet single-channel centrifugal fan to determine the structure size of the fan. The improved internal flow field simulation results of the fan show that the airflow speed at the upper air outlet and the outer edge of the impeller of the single air outlet single air channel centrifugal fan is larger, and the air velocity attenuation distance is increased, which is beneficial to the airflow covering the entire screen surface; It is basically distributed in layers, and the lateral air flow at the air outlet is symmetrically distributed on the middle high side and low side, with obvious boundary effects. The influence of the fan speed, the distribution of the fan's internal flow field, the wind speed of the air outlet, and the air volume is analyzed: the wind speed and air volume of the air outlet gradually increase with the increase of the fan speed.

KEYWORDS

centrifugal fan, Internal flow field, Numerical Simulation, CFD

CITE THIS PAPER

Dejian Li. Numerical Simulation of Internal Flow Field of Centrifugal Fan for Clearing and Selecting Grain Harvester. Journal of Engineering Mechanics and Machinery (2020) Vol. 5: 12-18. DOI: http://dx.doi.org/10.23977/jemm.2020.050103.

REFERENCES

[1] Ranganathan Panneerselvam, Sivaraman Savithri, Gerald Devasagayam Surender. CFD modeling of gas–liquid–solid mechanically agitated contactor [J]. Elsevier B.V., 2008, 86 (12). 
[2] Liu Yanyan. Experimental research and simulation analysis of centrifugal fan in air and screen cleaning device [D]. Zhenjiang: Jiangsu University, 2009. 
[3] Li Hongchang. Theoretical and experimental study on air-and-screen cleaning unit [D]. Zhenjiang: Jiangsu University, 2011. 
[4] Wan-Ho Jeon, Duck-Joo Lee. A numerical study on the flow and sound fields of centrifugal impeller located near a wedge [J]. Journal of Sound and Vibration, 2003, 266 (4). 
[5] Chen Shenyu, Gui Xi, Wang Canxing. Three-dimensional numerical simulation of the internal flow in the centrifugal fan [J]. Fluid Machinery, 2007, 35 (9): 22-25. 
[6] Sheng Dechao.A cleaner with double channel of a centrifugal fan and its application [J]. Journal of Jiamusi University, 1999, 3 (1): 20-22.

Sponsors, Associates, and Links

---

• Cybernetics and Mechatronics
  
  
• Digital Manufacturing and Process Management
  
  
• Ultra-Precision Machining Process
  
  
• Journal of Robotics and Biomimetics
  
  
• Prognostics, Diagnostics and Health Management
  
  
• Micro-Electro-Mechanical Systems
  
  
• Journal of Precision Instrument and Machinery
  
  
• Engineering and Solid Mechanics
  
  
• Fracture and Damage Mechanics
  
  
• Frontiers in Tribology
  
  
• Fluid and Power Machinery
  
  
• Chemical Process Equipment
  
  
• Journal of Assembly and Manufacturing
  
  
• Mechanical Vibration and Noise