Etude expé́rimentale du transport hydraulique de grandes particules en conduite horizontale et en forme de S
TypeCommunications avec actes
We study the pressure drop and flow regimes for large spheres with respect to the diameter of the pipe (5, 10 and 15%) by differential pressure measurements and visualizations. Two densities are used. The losses are smaller for large grain sizes, and density has a strong effect on the transition point between regimes with a stationary bed flow and dispersed flows. Models based on the Froude number are tested. Finally, we study mixtures of size and / or density. We are also interested in plugging and unplugging transients.
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Performance gains provided by the use of a counter-rotating axial-flow fan with respect to a conventional rotor-stator stage WANG, Juan; RAVELET, Florent; BAKIR, Farid (Ethan publishing, 2015)The adoption of counter-rotating stages for propellers, axial-flow pumps and low-speed fans has opened a way to design high performance and compact turbomachines in various industrial domains, leading to potentially high ...
RAVELET, Florent; BAKIR, Farid; KHELLADI, Sofiane; REY, Robert (Elsevier, 2013)This article presents an experimental study of the hydraulic transport of very large solid particles (above 5 mm) in an horizontal pipe. Two specific masses are used for the solids. The solids are spheres that are large ...