Optimization of Aerodynamic Drag Reduction and Its Flow-Field Mechanism for a Sport Utility Vehicle (SUV)

被引：0
|
作者：
Shao J. [1 ]
Zuo H. [1 ]
Hu X. [2 ]
机构：
[1] SAIC Motor R&D Innovation Headquarters, Shanghai
[2] Jilin University, National Key Laboratory of Automotive Chassis Integration and Bionics, Changchun
来源：
Qiche Gongcheng/Automotive Engineering | 2024年 / 46卷 / 02期
关键词：
aerodynamic drag reduction; automotive aerodynamics; proper orthogonal decomposition; wind tunnel test;
D O I：
10.19562/j.chinasae.qcgc.2024.02.018
中图分类号：
学科分类号：
摘要：
To improve the fuel economy of vehicles，simulation and experiments are combined to improve the aerodynamic drag coefficient during driving，taking a certain SUV model as the research object. Firstly，wind tunnel tests are used to determine the areas or components that have significant impact on the overall aerodynamic drag of the vehicle. Secondly，optimizations are made to the components or areas with high contribution values to the air resistance coefficient. The results show that the front wheel deflectors，taillights and spoilers contribute greatly to the overall air resistance coefficient of the vehicle. The restyling of the front wheel deflectors effectively reduces the frontal pressure area and interference drag from the wheels. Optimizations on taillights and spoilers improve the rear negative pressure zone and shorten the reattachment distance of separated flows on the upper part of the rear window. Based on the intrinsic orthogonal decomposition method for extracting and analyzing local flow field information，it can be concluded that the first and second order modals mainly constitute the key flow states in the wake. Compared to the initial scheme，a drag reduction rate of 7.5% can be achieved by the optimized combination design，which is verified by tests and simulations. Theoretical basis and technical support are provided in this paper for restyling and model change of the next generation of SUV. © 2024 SAE-China. All rights reserved.
引用
收藏
页码：356 / 365
页数：9
相关论文
共 21 条
  • [1] HU X J，, HUI Z，, GUO P，, Et al., Experimental study on vehicle drag reduction based on plasma flow control［J］, Journal of South China University of Technology（Natural Science Edition）, 47, 11, pp. 10-15, (2019)
  • [2] GANDHI H., Review on vehicle′s aerodynamic drag reduction［J］, International Journal for Scientific Research and Development, 5, 10, (2017)
  • [3] PHAM Q T, NGUYEN T K L，, Et al., A numerical analysis of active flow control techniques for aerodynamic drag reduction in the square-back ahmed model［J］, Applied Science-Basel, 13, 1, (2023)
  • [4] WANG J Y, ZHOU S S，, HU X J，, Et al., Research on aerodynamic drag reduction of GTS model based on plasma［J］, Journal of Hunan University（Natural Sciences）, 47, 6, pp. 24-33, (2020)
  • [5] MUKUT A N M M I, ABEDIN M Z., Review on aerodynamic drag reduction of vehicles［J］, International Journal of Engineering Materials and Manufacture, V4, 1, (2019)
  • [6] LI Y L, ZHU H, YANG Z G., Design of electric vehicle modeling based on low wind resistance［J］, Journal of Tongji University （Natural Science edition）, 45, 9, pp. 1366-1371, (2017)
  • [7] WANG J Y, HU X J，, Et al., Flow induced vibration characteristics and flow mechanism of automotive exterior rearview mirrors［J］, Journal of Jilin University（Engineering and Technology Edition）, 47, 6, pp. 1669-1676, (2017)
  • [8] HARSH S，MAHAVIR S., Reduction of drag of SUV similar to tata sumo using vortex generator［J］, Journal of Theoretical & Applied Mechanics, 48, 4, pp. 19-30, (2018)
  • [9] Soo-Whang BAEK, Wook LEE Sang, Aerodynamic drag reduction on a realistic vehicle using continuous blowing［J］, Microsystem Technologies-Micro-And Nanosystems-Information Storage And Processing Systems, 26, 1, pp. 11-23, (2020)
  • [10] ZHANG Y, SHI J Q，, GU Z Q，, Et al., Research on interaction effect of tail characteristic parameters on aerodynamic drag and global optimization［J］, Journal of Hunan University（Natural Sciences）, 47, 2, pp. 14-20, (2020)
123