Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Experimental investigation of tornado-like vortex dynamics with swirl ratio: The mean and turbulent flow fields
AbstractAn experimental simulation of tornado-like vortices is conducted in a small tornado vortex simulator in order to study the effect of swirl ratio on flow characteristics. Particle Image Velocimetry (PIV) method is employed to quantitatively determine the tornado-vortex velocity field for swirl ratios ranging from 0.08 to 1. The radial and tangential components of velocity as well as the core radius of the tornado increase with increase in swirl ratio. The location of the maximum radial and tangential velocities is adjacent to the ground where the tornado vortex interacts with the surface. The values of normal and shear turbulent stresses indicate the existence of a laminar core for small swirl. As expected the shear stresses increase with swirl ratio as the vortex becomes turbulent. The highest turbulent production corresponds to the critical case of vortex touchdown.
Experimental investigation of tornado-like vortex dynamics with swirl ratio: The mean and turbulent flow fields
AbstractAn experimental simulation of tornado-like vortices is conducted in a small tornado vortex simulator in order to study the effect of swirl ratio on flow characteristics. Particle Image Velocimetry (PIV) method is employed to quantitatively determine the tornado-vortex velocity field for swirl ratios ranging from 0.08 to 1. The radial and tangential components of velocity as well as the core radius of the tornado increase with increase in swirl ratio. The location of the maximum radial and tangential velocities is adjacent to the ground where the tornado vortex interacts with the surface. The values of normal and shear turbulent stresses indicate the existence of a laminar core for small swirl. As expected the shear stresses increase with swirl ratio as the vortex becomes turbulent. The highest turbulent production corresponds to the critical case of vortex touchdown.
Experimental investigation of tornado-like vortex dynamics with swirl ratio: The mean and turbulent flow fields
Hashemi Tari, Pooyan (Autor:in) / Gurka, Roi (Autor:in) / Hangan, Horia (Autor:in)
Journal of Wind Engineering and Industrial Aerodynamics ; 98 ; 936-944
05.10.2010
9 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Swirl ratio effects on tornado vortices in relation to the Fujita scale
| British Library Online Contents | 2008
Swirl ratio effects on tornado vortices in relation to the Fujita scale
| Online Contents | 2008