汽车外流场分析以及流线型改进

doi:10.3976/j.issn.1002-4026.2020.03.013

Abstract

Abstract: Based on a miniature car as a prototype, a numerical simulation of the aerodynamic characteristics of the car's three-dimensional external flow field is carried out. By analyzing the pressure field between the original car and the improved streamlined car at different speeds, and comparing the aerodynamic drag values.The results show that the pressure distribution of the improved streamlined car has been effectively improved at the normal driving speed of 20 m/s or the limiting driving speed of 50 m/s. The aerodynamic drag of the car is 6.67% at the normal driving speed of 20 m/s, and it can still reduce the resistance by 4.55% at the limiting driving speed of 50 m/s. The improved car can effectively reduce the aerodynamic drag value, and improve the power and fuel economy of the car.

Key words: numerical simulation, external flow, streamlined, aerodynamic drag, fuel economy

CLC Number:

TH138

LIU Jin, JIANG Hui-lue, LIU Bo, DU Da-wei. External flow field analysis and streamlined improvement of a car[J].Shandong Science, 2020, 33(3): 87-92.

References 10

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External flow field analysis and streamlined improvement of a car

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