Rear-roof spoiler effect on the aerodynamic drag performance of a simplified hatchback model

15th Asian Congress of Fluid Mechanics

物理学;力学

Cheng, S.Y.^1,2 ; Mansor, S.^3

Centre for Advanced Research on Energy, Universiti Teknikal Malaysia Melaka, Hang Tuah Jaya, Durian Tunggal, Melaka

76100, Malaysia^1

Faculty of Mechanical Engineering, Universiti Teknikal Malaysia Melaka, Hang Tuah Jaya, Durian Tunggal, Melaka

76100, Malaysia^2

Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, UTM Skudai, Johor

81310, Malaysia^3

关键词: Ahmed models;    CFD method;    Inclination angles;    Pitch angle;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/822/1/012008/pdf
DOI  :  10.1088/1742-6596/822/1/012008

学科分类：力学，机械学

来源: IOP

【 摘 要 】

The effect of rear-roof spoiler on the aerodynamic drag performance of simple hatchback model has been investigated for a range of spoiler pitch angles. RANS based CFD method was utilized. Validation was done by comparing the CFD results of Ahmed model without spoiler to the experimental data. The spoiler has a beneficial influence at positive inclination angle below 5°. Above that angle, the aerodynamic drag increases with pitch angle. The mechanism of how the spoiler influences the aerodynamic drag was identified through extensive flow visualization.