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A Turbulent Plane Two-Dimensional Wall-Jet in a Quiescent Surroundings

Hans Abrahamsson (Institutionen för termo- och fluiddynamik) ; Bert Johansson (Institutionen för termo- och fluiddynamik) ; Lennart Löfdahl (Institutionen för termo- och fluiddynamik)
European Journal of Mechanics/B-Fluids Vol. 13 (1994), 6,
[Artikel, refereegranskad vetenskaplig]

An experimental investigation of the turbulence field in a plane two-dimensional wall-jet has been conducted. All measurements were carried out employing hot-wire techniques in a large scale experimental facility. Mean velocities, Reynolds stresses and wall shear stress were determined with slot Reynolds numbers of 1.0*104, 1.5*104 and 2.0*104. The wall-jet was found to be self-preserving, and an asymptotic scale matching was used to show the existence of a short inertial sub layer as compared with a wall boundary layer. Studies of the integral scale development and the turbulent diffusion of shear stress showed a strong interaction between the inner and outer regions of the wall-jet. Using momentum scaling, it was found that the streamwise development of the half-width and maximum mean velocity was independent of the slot Reynolds number.



Denna post skapades 2010-08-23.
CPL Pubid: 125058

 

Institutioner (Chalmers)

Institutionen för termo- och fluiddynamik (1989-2004)

Ämnesområden

Strömningsmekanik

Chalmers infrastruktur