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홍최상열(Sangyeol Choi),이동현(Donghyun Lee),하종백(Jongpaek Ha) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
Recently, wheels in road vehicle are being developed to be stiffed and lighten from the standpoint of vehicle dynamics and fuel economy, respectively. In addition, design and shape of wheels are being diversified more and more. So, understanding air flow characteristics by those changes of wheel design and shape are very important on production vehicle, because it affect on not only aerodynamic performance which can be sensitized by geometric complexity near wheel, but also thermal performance which can be depended on convective heat transfer rate governed by cooling air flow entering into thermal objectives inside wheel rim like a brake assembly. The objective of this investigation is to analyze aerodynamic performances on the wheel spokes which were designed virtually using NACA airfoil. According to the results, air flow through the wheel opening area could be controlled by NACA airfoil spokes with angle of attack, and also drag coefficient and lift coefficient were changed by the changes of air flow patterns. The results are intended to be used in guiding the establishment of optimum wheel design for future aerodynamic friendly vehicle.
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