A Research on the Influence of Hole Diameter on the Air Film Drag Reduction Effects of Van Body Surface

作者：Cao, Lifeng; Zhou, Shouqin; Xie, Xiaopeng^*

来源：Qiche Gongcheng/automotive Engineering, 2017, 39(4): 401-406.

DOI：10.19562/j.chinasae.qcgc.2017.04.006

• Air films
• CFD simulations
• Frictional resistance
• Vans
• Wind resistance

This paper aims at investigating the influences of hole diameter on the van surface drag reduction effects when adopting the method of drag reduction by air film. First of all, the effects of hole diameter on the air flow distribution on cube model surface are qualitatively analyzed by CFD simulation, and it is found that the diffusion phenomenon of air flow on cube model surface become more significant with the increase of hole diameter. Then, a wind resistance measurement of cube models with holes of different diameters is conducted in a resistance measurement device, which can produce variable wind speeds, and the results are compared with that of the cube model without air injection holes. The results show that simulation results well agree with that of measurement, and the drag reduction effects are enhanced with the increase of hole diameter. The finding provids references for the practical application of air-film drag reduction scheme to the resistance reduction of van surface.

• 出版日期2017-4-25
• 单位华南理工大学