Experimental analysis of the flow around ahmed bodies in tandem position
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Data
2022
Orientador
Coorientador
Pós-graduação
Curso de graduação
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ABCM
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Trabalho apresentado em evento
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Resumo
Use of experimental methods is fundamental for the automobile industry, as it allows one to analyze aerodynamic
phenomena that are crucial for the development of automobiles. A coherent method is to use Ahmed bodies with
different rear inclination angles as a reference model, considering that it has been used in studies that aim to analyze the
flow of land vehicles, whilst generating satisfactory results. So, in this experimental work, we explored the impact of the
rear inclination angle and the spacing between Ahmed bodies in tandem (simulating a truck convoy), aiming to determine
the best configuration concerning the drag reduction. The experimental methodology used flow visualization techniques
in the horizontal hydrodynamic tunnel. The flow was visualized and registered by a camera for different rear inclination
angles (10°, 20°, 30° and 35°) and different gap ratios (0.5 to 1.0) between the Ahmed bodies at a fixed Reynolds number
of 2:06 103. Thus, we observed that, even if differences in the flow were presented in all cases, the body with a rear
slant angle of 30° has the biggest wake region not mattering the spacing between models. Additionally, the impact of the
gap ratio varied for each rear inclination angle.
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MARTINS, Gustavo Xavier; ARANDA, Gabriel dos Santos; CAMPOS, Henrique Matos; PANTELÃO, Aluisio Viais. Experimental analysis of the flow around ahmed bodies in tandem position. In: BRAZILIAN CONGRESS OF THERMAL SCIENCES AND ENGINEERING, 19th, 2022, Bento Gonçalves. Anais [...] Rio de Janeiro: ABECM, 2022.