Steady suction for controlling across-wind loading of high-rise buildings

Abstract

SUMMARYTo reduce across-wind effects on high-rise buildings, this paper introduces a new active aerodynamic control named steady suction. To test its effect, the control mechanism of steady suction is discussed first, and then, a synchronization pressure test was conducted in a wind tunnel to measure the across-wind loading on a high-rise model (Commonwealth Advisory Aeronautical Research Council standard high-rise building model). A series of analytical methods were used to compare the different effects on across-wind aerodynamic forces caused by different parameters. The results show that when the wind blows straight on the wide side of the model, steady suction arranged on the narrow side close to the leading edge can effectively reduce the fluctuating base moment. When the wind blows straight on the narrow side, steady suction arranged on the middle of the wide side effectively reduces the fluctuating base moment.

Numerical Investigation of Multi-SDBD Plasma Actuators for Controlling Fluctuating Wind Load on Building Roofs

“…In recent years, various active control strategies have been gradually applied to decrease wind loads of different structures. For example, Zhang et al [5] proposed using steady suction control to reduce the across-wind loading on a high-rise building and found that this control method disturbed the motion or development of large-scale leading edge vortices. Wang et al [6] used two small affiliated rotating cylinders to reduce the drag of a circular cylinder by suppressing the vortex shedding.…”