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Title: Hysteresis in Flow Patterns in Annular Swirling Jets
Authors: Vanierschot, Maarten ×
Van den Bulck, Eric #
Issue Date: 2007
Publisher: Elsevier Science Inc
Series Title: Experimental Thermal and Fluid Science vol:31 issue:6 pages:513-524
Abstract: This study investigates the influence of swirl on the mean cold flowfield of an annular jet with a stepped-conical expansion. Both the axial and azimuthal velocity components are measured using a two component Laser Doppler Anemometry system in forward scattering mode. A detailed description of the radial profiles of both mean axial and azimuthal velocity as well as three components of the Reynolds stress are given. Four different jets are identified as a function of the swirl number: ‘Closed Jet Flow’, ‘Open Jet Flow Low Swirl’, ‘Open Jet Flow High Swirl’ and ‘Coanda Jet Flow’. These flow patterns change with varying swirl number and there exists hysteresis when increasing and subsequently decreasing the swirl. Also a method for jet identification based upon pressure measurements is presented to replace the time consuming LDA measurements.
ISSN: 0894-1777
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Applied Mechanics and Energy Conversion Section
Mechanical Engineering Technology TC, Campus Group T Leuven
Technologiecluster Werktuigkundige Industriƫle Ingenieurstechnieken
× corresponding author
# (joint) last author

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