APPLICATION OF THE SUCTION METHOD TO REDUCE THE WIND LOAD ON HIGH-RISE BUILDING

As the drag force of the bluff body is greatly increased due to the separation flow, the suction method is proposed to investigate the performance of the Drag Reduction (DR) to a high-rise building via numerical method. The effects of the suction position, suction angle, slot size and flux coefficient on the DR are analyzed. The results show that the DR is more significant with larger flux coefficient, and the Coefficient of the Drag Reduction (CDR) of the model under the flux coefficient of 0.0686 and the suction angle of 15o arrives at 0.523, however, the function of the suction angle and slot size is little for DR. As the suction is moving along the vertical direction of the model, the results show that the efficiencies of the Drag Reduction and Moment Reduction of any suction section are all greater than 1.0. When the height is increased, the efficiencies increase firstly and decrease afterwards, and the greatest values happen at the height of 0.425 m. Lastly, the formulae are regressed for the Coefficient of Pressure Reduction with regard to the flux coefficient and the suction height.