Simulação numérica do escoamento de ar na seção de testes de um túnel de vento para baixas velocidades

Journal of Advanced Research in Mechanical Engineering (Vol.1-2010/Iss.4) Matheus et al./ Airflow CFD Modeling in the Test Section … / pp. 210-225

Airflow CFD Modeling in the Test Section of a Low-Speed Wind Tunnel
Matheus S. Guzella*, Daniele Manto**, Cleide B. Soares***, Cristiana B. Maia*, Sérgio M. Hanriot*, Luben CabezasGómez* * Department of Mechanical Engineering, Pontifícia Universidade Católica de Minas Gerais – PUC Minas, Av. Dom José Gaspar, 500, Coração Eucarístico, Belo Horizonte, MG, Brazil, 30535-901 tel/fax: [phone] e-mail: [e-mail], [e-mail],[e-mail],[e-mail]

** Stadler Bussnang AG, Ernst-Stadler St. 4 , 9565 Bussnang – Switzerland tel: [phone] e-mail: [e-mail]

*** Department of Mechanical Engineering, Centro Federal de Educação Tecnológica de Minas Gerais, Av. Amazonas, 5253. Nova Suíça. Belo Horizonte, MG, Brazil, 30480-000 e-mail: [e-mail] Submitted: 29/06/2010 Accepted: 26/09/2010 Appeared: 20/11/2010 HyperSciences.Publisher

Abstract— This paper presents numerical results and experimental data of the airflow inside a low-speed wind tunnel made of wood, with a square test section with length of 0.79 m and side of 0.2 m. The experimental tests were performed in the exit region of the tunnel test section using a Pitot tube and a hot wire anemometer. The numerical predictions were obtained by solving the Reynolds-Averaged Navier–Stokes (RANS) equations using the Shear Stress Transport k- turbulence model with the ANSYS-CFX® code. A numerical solution of a fully developed turbulent channel flow is also presented for comparison purposes. The numerical values of axial velocity were compared with the measurements in the exit region of the tunnel. The turbulent kinetic energy was compared with experimental data in the central point of the exit cross-section of the tunnel. The results are in good agreement with the experimental data.