The paper reports flow visualizations of a free slot jet of air, obtained with the shadowgraph technique, in the Reynolds number range allowed by the experimental apparatus, i.e. from Re=1,682 to Re=22,107. The Reynolds number is based on the hydraulic diameter of the slot. The shadowgraphs have confirmed the presence of the undisturbed region of flow, which is the zone of the jet flow where velocity and turbulence are about the same as those measured on the slot exit. The undisturbed region of flow is dependent on the Reynolds number. It is higher than three times the slot height, for Re=1,682, and equal to the slot height, for Re=22,107. To confirm the findings of the visualizations, fluid dynamics measurements have been carried out with the hot wire anemometry. The fluid dynamics measurements have confirmed these values with a little over-prediction.
Gori, F., Nino, E. (2003). Fluid Dynamics Measurements and Flow Visualizations of a Free Slot Jet of Air. In American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FED, Volume 259, 2003, Pages 187-192 (pp.187-192) [10.1115/IMECE2003-41027].
Fluid Dynamics Measurements and Flow Visualizations of a Free Slot Jet of Air
GORI, FABIO;
2003-01-01
Abstract
The paper reports flow visualizations of a free slot jet of air, obtained with the shadowgraph technique, in the Reynolds number range allowed by the experimental apparatus, i.e. from Re=1,682 to Re=22,107. The Reynolds number is based on the hydraulic diameter of the slot. The shadowgraphs have confirmed the presence of the undisturbed region of flow, which is the zone of the jet flow where velocity and turbulence are about the same as those measured on the slot exit. The undisturbed region of flow is dependent on the Reynolds number. It is higher than three times the slot height, for Re=1,682, and equal to the slot height, for Re=22,107. To confirm the findings of the visualizations, fluid dynamics measurements have been carried out with the hot wire anemometry. The fluid dynamics measurements have confirmed these values with a little over-prediction.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
