The Vortex Dominated Flow Field Associated with a Confined Jet in a Crossflow

Disimile, Peter J.; Toy, Norman
November 2006
International Journal of Dynamics of Fluids;2006, Vol. 2 Issue 2, p155
Academic Journal
This study focuses on the near field mixing of a confined circular jet that is being injected normally from a wall into a subsonic crossflow in a confined area. The streamwise, transverse and lateral mean velocities were obtained using a two-component Laser Doppler Anemometer. From these quantities the time average vorticity in three dimensions were estimated for locations between 1.5 and 4.5 jet diameters downstream of the jet exit. The jet to crossflow velocity ratio was kept constant at four. The results highlight a complex system of vortices within this flowfield that is different to that of a free jet in a crossflow. In addition the present study was able to quantify changes in the vortical structures as a function of downstream distance as well as provides evidence of what effect freestream turbulence as on the evolving vorticity.


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