Determinación de los coeficientes de arrastre y sustentación en un perfil angular de alas iguales con el empleo de simulación numérica

Nelson Fundora Sautié; Leonardo Romero Monteiro; Edith Beatriz Camano Schettini; Vivian Elena Parnás

doi:10.14482/inde.38.1.511.8

Authors

Nelson Fundora Sautié Universidad Tecnológica de La Habana (CUJAE)
Leonardo Romero Monteiro Universidade do Estado de Santa Catarina (UDESC)
Edith Beatriz Camano Schettini Universidade Federal do Rio Grande do Sul (UFRGS)
Vivian Elena Parnás Universidad Tecnológica de la Habana José Antonio Echeverría (CUJAE)

DOI:

https://doi.org/10.14482/inde.38.1.511.8

Keywords:

Blockage ratio, CFD, Drag coefficient, Lift coefficient, OpenFOAM

Abstract

Telecommunications towers and other structures composed of steel sections are particularly susceptible to the action of wind loads that need to be quantified for a correct design of these sections. In the obtaining of wind loads, the determination of the drag (C_D) and lift (C_L) coefficients of the elements that compose the lattice, is vitally important because, from these coefficients, the separation and the permeability of the lattice is estimated the acting wind load. This paper studies the influence of the blockage ratio on the C_D and C_L coefficients in an equal-leg angle section, widely used in this kind of structure. To obtain these coefficients, computational fluid dynamics (CFD) was used through OpenFOAM software. As part of the experiment, three blockage ratios were simulated: 5 %, 10 % and 20%, using as a comparison pattern the C_D and C_L values provided by the NBR 6123 1988, NC 285 2003, NBCC 2005 and ASCE 7-10 2010 standards [1]-[4] . The best results were obtained for a 5 % blockage.

Author Biography

Nelson Fundora Sautié, Universidad Tecnológica de La Habana (CUJAE)

MSc. Ing. Civil

Profesor Asistente en la Universidad Tecnológica de la Habana José Antonio Echeverría CUJAE.

Facultad de Ingeniería Civil, Departamento de Estructuras

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