Research on the Rear-Spoiler Winglet to Further Improve the Aerodynamic Performance of Hatch-Back Vehicles
This paper presents a new type of aerodynamic optimization in terms of cutting down aero-drag without compromising huge numbers of styling features or inercasing the weight considerably.The ideology of adding winglet to each side of the rear-spoiler was firstly brought to us by some previous SAE papers”1”,which unfortunately,depict this optimization in rather vague manners.With the help of the geometrical graph included in those papers,a similar winglet model was built and added to the full-vehicle model,followed by a series of computational verifications on commercial CFD software.By carefully investigating the flow field around the rear-spoiler and vehicle back region,some size and shape adjustments were made to the winglet to maximize its effect of decreasing aero-drag.Later,different sets of real winglet prototypes were made and tested in 3 different wind-tunnel experiments,during which the effect of winglets on drag-reduction has been confirmed and compared with the results from CFD simulation.Discussion and analysis on the disparity be-tween test results and the numerical ones has been conducted,followed by the final conclusion.
aerodynamics winglet drag-reduction CFD simulation wind-tunnel test base pressure wake flow
He Yue
CAE Centre,Changan Global R&D Institute
国内会议
上海
英文
1617-1622
2017-10-24（万方平台首次上网日期，不代表论文的发表时间）