Turbulence control in multiple-fan wind tunnels

Abstract Many types of meteorological, environmental and boundary layer wind tunnels have been constructed to simulate atmospheric phenomena on buildings and structures. New types of two- and three-dimensional wind tunnels have been constructed. These tunnels habe multiple-fans and oscillating blade rows to control the turbulence in the tunnels, and are controlled by computers. In this study a few turbulence parameter profiles were obtained in both longitudinal and vertical directions, and a trial to control the Reynolds stress was carried out.