Active Drag Reduction of Fastback MIRA Model Based on Steady Blowing

被引：0
|
作者：
Chen, Yu [1 ,2 ]
Wang, Zhijun [1 ,2 ]
Wang, Kewei [1 ,2 ]
Yang, Zhigang [1 ,2 ,3 ]
机构：
[1] School of Automotive Studies, Tongji University, Shanghai
[2] Shanghai Key Lab of Vehicle Aerodynamics and Vehicle Thermal Management System, Shanghai
[3] Beijing Aeronautical Science & Technology Research Institute, Beijing
来源：
Tongji Daxue Xuebao/Journal of Tongji University | 2024年 / 52卷
关键词：
active control; drag reduction; fastback MIRA model; steady blowing;
D O I：
10.11908/j.issn.0253-374x.24747
中图分类号：
学科分类号：
摘要：
Low aerodynamic drag are of great significance for energy conservation and emission reduction of fuel vehicles，as well as increasing the range of electric vehicles. In recent years， the active jet technology is mostly applied to high aerodynamic vehicle models such as square back model，but its drag reduction and mechanism on low drag vehicles are not clear. In this paper，the effects of steady jet position，jet momentum coefficient and jet angle on drag reduction and net saving are studied，and the flow field analysis is given. The results show that the vertical rear jet（J3，J4，J5）of the fast back vehicle is an effective energy-saving measure，the low momentum coefficient has a good net saving rate，and the aerodynamic drag reduction and net saving rate have a maximum value with the change of jet angle. The best working condition to get the back jet in the end is：J3，J4 and J5 jet grooves arranged at the tail of the model are used for jet，the momentum coefficient is 1% and the jet angle is 45 ° ，the aerodynamic drag was reduced 2% and the net saved energy can reach 9.5% and 129.7W，respectively. © 2024 Science Press. All rights reserved.
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页码：124 / 131
页数：7
相关论文
共 16 条
  • [1] Test method for energy consumption rate and range of electric vehicles：GB/T18386—2017［S］
  • [2] Wenhuo LI, Study on the aerodynamic drag reduction characteristics of groove type non optical pulley gauges for automobiles［D］, (2014)
  • [3] HYUNGMIN P., Aerodynamics of heavy vehicles［J］, Annual Review of Fluid Mechanics, 46, (2014)
  • [4] YANG Zhigang, FAN Yajun, XIA Chao, Et al., Drag reduction of a square ⁃ back Ahmed model based on bi ⁃ stable wake ［J］, Journal of Jilin University （Engineeringand Technology Edition）, 50, 5, (2020)
  • [5] ODENTHAL H J., Drag reduction of motor vehicles by active flow control using the Coanda effect［J］, Experiments in Fluids, 28, 1, (2000)
  • [6] Active drag control for a generic car model［J］, Notes on Numerical Fluid Mechanics and Multidisciplinary Design, 95, (2007)
  • [7] BRUNEAU C H，, CREUSE E，, DEPEYRAS D，, Et al., Coupling active and passive techniques to control the flow past the square back Ahmed body［J］, Computers and Fluids, 39, 10, (2010)
  • [8] KOURTA A., Analyze and control of the near-wake flow over a square-back geometry［J］, Computers and Fluids, 38, 1, (2013)
  • [9] Validation of PANS and active flow control for a generic truck cabin ［J］, Journal of Wind Engineering and Industrial Aerodynamics, 171, (2017)
  • [10] ZHOU Hua, YANG Zhigang, ZHU Hui, Aerodynamic calculation of MIRA model correlated with wind tunnel test［J］, Journal of Jilin University （Engineering and Technology Edition）, 49, 4, (2019)
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