Experimental Investigation on Aerodynamic Characteristics for 3D Bluff Bodies: Pentagon, T, C and L-Shape Buildings

: Tall buildings are mostly sensitive to wind loads and the effect of wind varies in accordance with the location, shape and height of the building. It is of utmost importance to have an aerodynamically modified building in order to reduce the wind loads on tall buildings. For the present study, a sequence of wind tunnel tests was carried out for the different building of various forms such as Pentagon, T, C and L. This paper focuses on finding the aerodynamic coefficient which includes drag, lift and torsional moment coefficients. The wind tunnel is operated at a wind velocity of 10 m/s and the building models are tested for different wind angles 0 ˚ , 45 ˚ , 90 ˚ , 135 ˚ and 180 ˚ . From the test results, it is concluded that pentagon plan shape building performs better than other shapes against aerodynamics forces.

[1]  B. Bhattacharyya,et al.  Experimental and Numerical Study of Wind-Pressure Distribution on Irregular-Plan-Shaped Building , 2020 .

[2]  Xing Ma,et al.  Wind tunnel test on aerodynamic coefficients of multi-bundled conductors under skew winds , 2019, Journal of Fluids and Structures.

[3]  Elham Mehrinejad Khotbehsara,et al.  Study on wind aerodynamic and flow characteristics of triangular-shaped tall buildings and CFD simulation in order to assess drag coefficient , 2019, Ain Shams Engineering Journal.

[4]  K. Rajasekarababu,et al.  Experimental and computational investigation of outdoor wind flow around a setback building , 2019, Building Simulation.

[5]  D. Tafti,et al.  Investigation of drag, lift and torque for fluid flow past a low aspect ratio (1:4) cylinder , 2018, Computers & Fluids.

[6]  G. Schewe,et al.  Experiments on the aerodynamic behaviour of square cylinders with rounded corners at Reynolds numbers up to 12 million , 2017 .

[7]  H. Sarath Kumar,et al.  Pressure Measurement Studies on a 1:1.5:7 Rectangular High Rise Building Model under Uniform Flow , 2017 .

[8]  Ming Gu,et al.  Experimental study of across‐wind aerodynamic damping of super high‐rise buildings with aerodynamically modified square cross‐sections , 2014 .

[9]  T. Sundararajan,et al.  Effects of aspect ratio and orientation on the wake characteristics of low Reynolds number flow over a triangular prism , 2014 .

[10]  Erdem Türkeli,et al.  Determination and Comparison of Wind and Earthquake Responses of Reinforced Concrete Minarets , 2014 .

[11]  Yukio Tamura,et al.  Experimental investigation on aerodynamic characteristics of various triangular-section high-rise buildings , 2013 .

[12]  Jun Kanda,et al.  Wind pressures on tapered and set-back tall buildings , 2013 .

[13]  Yi Min Xie,et al.  Numerical simulations of wind drags on straight and twisted polygonal buildings , 2013 .

[14]  Yukio Tamura,et al.  Experimental investigation of aerodynamic forces and wind pressures acting on tall buildings with various unconventional configurations , 2012 .

[15]  Yao-Chun Zhang,et al.  Computational Fluid Dynamics study on the performance and mechanism of suction control over a high‐rise building , 2012 .

[16]  Jun Kanda,et al.  Characteristics of aerodynamic forces and pressures on square plan buildings with height variations , 2010 .

[17]  Jean-François Beaudoin,et al.  Drag and lift reduction of a 3D bluff-body using active vortex generators , 2010 .

[18]  Ming Gu,et al.  Across-wind loads of typical tall buildings , 2004 .

[19]  Walter Meile,et al.  Aerodynamic behaviour of prismatic bodies with sharp and rounded edges , 2004 .

[20]  G. Biswas,et al.  Experimental study of flow past a square cylinder at high Reynolds numbers , 2000 .

[21]  David Surry,et al.  Fluctuating pressures on models of tall buildings , 1995 .

[22]  Peter Sachs,et al.  Wind Forces in Engineering: 2nd Edition , 1978 .

[23]  S. Rajan,et al.  Effects of upstream terrain characteristics on aerodynamic coefficients of structures , 2018 .

[24]  Andrea Freda,et al.  Experimental investigation on the aerodynamic behavior of square cylinders with rounded corners , 2014 .

[25]  Theodore Stathopoulos,et al.  Wind Load Combinations Including Torsion for Rectangular Medium-Rise Buildings , 2013 .

[26]  William H. Melbourne,et al.  Wind loading of structures , 1998 .

[27]  A. Kareem.  Measurements of pressure and force fields on building models in simulated atmospheric flows , 1990 .