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http://dx.doi.org/10.21289/KSIC.2022.25.5.899

A Study on CFD of Turbo fan and Fabrication of Turbo Fan with Honeycombs by PBF  

Jin, Chul-Kyu (School of mechanical engineering, Kyungnam University)
Lee, Haesoo (Department of Automotive Engineering, Gyeongsang National University)
Lee, Un-Gil (School of mechanical engineering, Kyungnam University)
Woo, Jae-Hyeog (School of mechanical engineering, Kyungnam University)
Publication Information
Journal of the Korean Society of Industry Convergence / v.25, no.5, 2022 , pp. 899-908 More about this Journal
Abstract
In this study, a study was conducted to localize a large aluminum turbo fan used for tank powerpack. The turbo fan was scanned with a 3D scanner and then 3D modeling was performed. Computational fluid dynamics (CFD) were performed from the performance conditions of the fan, and structural analysis was performed using the pressure data obtained from CFD. The fan was reduced to 1/5 size by applying the geometric similarity. A 1/5 size fan has a honeycomb structure inserted into the front shroud and back shroud to reduce the weight by 5.3%. A 1/5 size fan was printed using a PBF 3D printer, and a 1/5 size fan with honeycombs was also printed. The pressure drop of 8.67 kPa and the required power of 138.19 kW, which satisfies the performance conditions of the fan, were confirmed from the results of CFD. The values of the maximum deformation amount of 0.000788 mm and the maximum effective stress of 0.241 MPa were confirmed from the structural analysis results. The fan printed by the PBF 3D printer had the same shape as the modeling, and the shape was perfect. There are no defects anywhere in appearance. However, the condition of the outer surface of the fan's back shroud is rough compared to other locations. The fan in which the honeycomb was inserted was also perfectly output, and the shape of the honeycomb was the same as the modeling.
Keywords
Computational Fluid Dynamics; Geometric Similitude; Honeycomb; Powder Bed Fusion; Turbo Fan;
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