建築構造物のジェットによる空力制御

Abstract

The effects of upstream corner jets on the aerodynamic characteristics of a square-section tower are investigated in the boundary layer wind tunnel. The method is proposed to control the separating flows from structures by using jets emitted from the upstream corners.It was confirmed that the flow pattern of the wake is changed by the corner jets and that the fluid forces acting on the structure undergo a change along with the alteration of flow pattern. The proposed method was effective for the control of the aerodynamic and aerostatic forces (lift and drag forces) of the 3-dimensional structures such as tall buildings. If a proper control algorithm such as the fuzzy active control using a self-tuning system with genetic algorithms is applied, the method with corner jets will be useful for the actuator of active control system of the aeroelastic vibration of tower-like structures with square section.