Wind Tunnel for Aerodynamic Development Testing

The study of the aerodynamics related to the improvement in the acting of airplanes and automobiles with the objective of being reduced the effect of the attrition of the air on structures, providing larger speeds and smaller consumption of fuel. The application of the knowledge of the aerodynamics not more limits to the aeronautical and automobile industries. Therefore, this research aims to design and construction of a wind tunnel to perform aerodynamic analysis in bodies of cars, seeking greater efficiency. Therefore, this research aims to design and construction of a wind tunnel to perform aerodynamic analysis in bodies of cars, seeking greater efficiency. For this, a methodology for wind tunnel type selection is designed to be built, taking into account the various existing configurations in which chose to build an open circuit tunnel, due to the lower complexity of construction and installation; operational simplicity and low cost. The guidelines for the project were teaching: the layer that limits study and analyze specimens with different geometries. For the variation of pressure in the test, section of a switched gauge used a pitot tube. Thus, it was possible to obtain quantitative and qualitative results, which proved to be satisfactory.

Authors:

• E. T. L. Cöuras Ford
• V. A. C. Vale
• J. U. L. Mendes
• F. A. Ribeiro

Keywords:

• Wind tunnel
• Aerodynamics
• Air.

References:

[1] 1998. Aerodynamics of road vehicles: from fluid mechanics to vehicle
engineering / Syed R. Ahmed.; edited by Wolf-Heinrich Hucho.
Warrendale: SAE, 918 p.
[2] Bell, J. H., Mehta, R. D. 1989. Boundary-layer predictions for small low
speed contractions American Institute of aeronautics and Astronautics,
v.27, n.3, p. 372-174.
[3] Canale, A. 1989. Automobilística: Dinâmica e Desempenho. Ed. Érika:
São Paulo.
[4] Catalano, F. M. 1988. Projeto, construção e calibração em túnel
aerodinâmico de circuito aberto tipo N.P.L. de seção transversal
hexagonal. USP: São Carlos.
[5] Carregari, A. L. 2006. Estudo do escoamento de ar sobre a carroceria de
um ônibus usando programa de CFD e comparação com dados
experimentais. USP: São Carlos.
[6] Groff, J. E. A.; Alé, J. V. 2000. Projeto de túnel de vento subsônico de
circuito aberto. Rio Grande do Sul: PUC.
[7] Fox, R. W. 2001. Introdução à mecânica dos fluidos. McDonald, LTC:
Rio de Janeiro 504p.
[8] Laranja, R. A. C. 2005. Mecânica dos fluidos. Ed. ULBRA: Canoas.
87p.
[9] Ahmed, S. R. Wake Structure of typical automobile shapes. Journal of
Fluids Engineering, Vol. 103, Mar 1981.
[10] Ahmed, S. R. Influence of base slant on the wake structure and drag of
road vehicles. Journal of Fluids Engineering, Vol. 105, Dec. 1983.
ABNT. 1997. Resíduos Sólidos: ABNT/NBR 10004. Rio de Janeiro.
[11] Anderson, J. D. Fundamentals of Aerodinamics. 3 ed., McGraw-Hill,
2001.
[12] Câmara, E. F. Estudo aerodinâmico do escoamento sobre modelo de
ônibus. ITA: São José dos Campos, 1993.
[13] Campbell, C. The sports car. Its design and performance. UK: Chapman
and Hall Ltda. 1969. [14] Diuzet, M. The moving-belt of the I.A.T. Long test section wind tunnel.
Journal of Wind Engineering and Industrial Aerodynamics, Vol. 22, pp.
237-244, 1986.
[15] Hucho, W. H. Aerodynamics of Road Vehicles. Butterworth, 1987.
[16] Kline, S. J.; McClintock, F.A. Describing Uncertainties in single-sample
experiments. Mechanical Engineering, Jan. 1953.
[17] Lajos, T.; Preszler, L. Effect of moving ground simulation on the flow
past bus models. Journal of Wind Engineering and Industrial
Aerodynamics, Vol. 22, pp. 271-277, 1986.
[18] Nicolazzi, L. C; Rosa, E. Introdução à modelagem de veículos
automotores. GRANTE-UFSC: Florianópolis, 2001.
[19] Videira, L. C. P. Estudo Experimental de um modelo de ônibus com
ênfase no escoamento da esteira. ITA: São José dos Campos, 2001.
[20] Cöuras Ford, E. T. L. Análise quali-quantitativa do deslocamento da
camada limite em carrocerias veiculares. UFRN, 2008.