Aerodynamic Evaluation and Modification of Tehran International Tower Section Exposed to Annual Winds

Document Type : Research Article

Authors

Aerospace Engineering Department Amirkabir University of Technology

Abstract

In the current research, the numerical simulation of the wind flow around the geometry of the 56-story Tehran International Tower exposed to different wind velocities in different directions has been performed and the aerodynamic forces, amplitudes, and frequencies of their fluctuations have been calculated. Then, according to the unfavorableness of any aerodynamic force acting on the tower from a structural point of view, from the combination of the average values and the range of fluctuations of the aerodynamic coefficients at each wind velocity and angle in the city of Tehran, a criterion for the aerodynamic evaluation of the Tehran International Tower exposed to annual winds has been presented. Numerical calculations have been done in an unsteady incompressible manner using the k-ω SST turbulence model. The most critical wind speeds and positions on the tower are detected at the directions of 0 and 20 degrees at wind speeds of 15 and 10 m/s, respectively. In order to improve the aerodynamic properties changes are made in the geometry of the tower and a new geometry is introduced and its aerodynamic coefficients are compared with the current geometry of the tower. According to the obtained results, the modified geometry has lower total aerodynamic coefficients than the original geometry in all critical wind situations and causes an average reduction of 21% in the total aerodynamic coefficients compared to the original geometry.

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References

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Amirkabir Journal of Mechanical Engineering
Volume 54, Issue 11
February 2023
Pages 2519-2542

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