STUDY OF UNSTATIONARY PULSED AIR JETS FOR SORTING OPERATIONS

Thiago Ferreira (1) , Sylvie Sesmat (1) , Eric Bideaux (1) , Fabien Sixdenier (2)

1 MIS - Ampère, Département Méthodes pour l'Ingénierie des Systèmes
2 EE - Ampère, Département Energie Electrique

Pulsed air jets are used in industries in order to perform sorting operations of different objects. Depending on the size and shape of the parts, the jet has different requirements. In this way, it is important to know the topography of the air jet and also its dynamic behavior during the pulse generation. This paper presents the results of measurements performed on subsonic pulsed air jets. It was possible to notice that, even on pulse generation, the jet presents the same topography as the one of steady state jet. Thus, it respects the analytical expressions found in the literature. The different delays related to the spatial propagation along the axis of the jet were also observed. Moreover, the results evidence the decrease of the jet quantities at operation frequency of 80 Hz where velocities magnitude was not able to reach the nominal values when compared to the tests performed at 10 Hz. The tests inside the potential core show a good repeatability of the jet quantities even outside the x-axis. This zone of high pneumatic energy is a good candidate in order to perform sorting applications. Further work consists on evaluating different valves, nozzle diameters, and chambers between them in order to identify which parameter can be optimized in order to have a fast and effective jet for ejection.

Mots clés: Fast switching valve; Sorting; Air jet

Domaines: Mécanique des fluides [physics.class-ph]

Thiago Ferreira, Sylvie Sesmat, Eric Bideaux, Fabien Sixdenier. STUDY OF UNSTATIONARY PULSED AIR JETS FOR SORTING OPERATIONS. 9th JFPS International Symposium on Fluid Power, Oct 2014, Matsue, Japan. pp.181-188. ⟨hal-01381335⟩