A numerical investigation on the performance improvement of axial-flow automotive cooling fan with beads
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DOI 10.1007/s12206-020-0724-0
Journal of Mechanical Science and Technology 34 (8) 2020 Original Article DOI 10.1007/s12206-020-0724-0 Keywords: · Automotive cooling fan · Axial fans · CFD · Fan efficiency · Multiple reference frame · Volumetric flow rate
Correspondence to: Chang Hyun Sohn [email protected]
Citation: Hur, K. H., Haider, B. A., Sohn, C. H. (2020). A numerical investigation on the performance improvement of axial-flow automotive cooling fan with beads. Journal of Mechanical Science and Technology 34 (8) (2020) 3317~3323. http://doi.org/10.1007/s12206-020-0724-0
Received March 11th, 2019 Revised
June 2nd, 2020
Accepted June 10th, 2020
A numerical investigation on the performance improvement of axial-flow automotive cooling fan with beads K. H. Hur, B. A. Haider and C. H. Sohn School of Mechanical Engineering, Kyungpook National University, Daegu 41566, Korea
Abstract
This paper presents a CFD analysis of three types of axial-flow magnesiumbased automotive cooling fans. The numerical modeling was conducted for geometrically modified fan designs: one with no-beads, the second one with beads at the suction-side of the fan namely reverse-beads fan, and the third one with beads installed at the pressure-side of the fan namely forward-beads fan. The effect of geometric modifications of the fan blades on the volumetric flow rate, fan efficiency, and energy efficiency was investigated using Reynoldsaveraged Navier-Stokes (RANS) equations following the multiple reference frame methodology. The fan with no-beads was fabricated using 3D printing technology and tested to measure the flow velocity. Subsequently, the fans with beads along with the no-beads fan designs were numerically analyzed. The volumetric flow rate, fan efficiency, and energy efficiency were quantified as a function of fan rotating speed. The results show that the reversebeads fan produced a relatively more volumetric flow rate and energy-efficient compared to the forward-beads fan. Moreover, to further improve the performance of the reverse-beads fan, the location and size of the bead structure were varied along the radial direction of the fan blade. The optimized reverse-beads fan significantly improves the fan performance.
† Recommended by Editor Yang Na
1. Introduction
© The Korean Society of Mechanical Engineers and Springer-Verlag GmbH Germany, part of Springer Nature 2020
The axial-flow fan is widely used in many industrial and engineering applications, ranging from large-scale systems such as air conditioning units and industrial dryers to automotive cooling and in-cabin air recirculation systems. The benefit of axial-flow fans to augment heat transfer is evident, particularly in the automotive industry due to the requirement of relatively compact design. The extensive use of axial-flow fans for fluid flow and heat transfer has appeared in the detailed investigation within the performance attributes of many design options [1, 2]. Nowadays, the engine compartment in automotive vehicles is becoming more crowded because of the i
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