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Lasheras, Juan C. and Liñán Martínez, Amable and Lecuona Newman, Antonio and Rodríguez Aumente, Pedro A. (1992). Vorticity dynamics in three-dimensional pulsating co-flowing jet diffusion flames. In: "Symposium (International) on Combustion (24. 1992. Sydney)", 5-10 Jul 1992, Sydney. ISBN 0082-0784.
Title: | Vorticity dynamics in three-dimensional pulsating co-flowing jet diffusion flames |
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Author/s: |
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Item Type: | Presentation at Congress or Conference (Article) |
Event Title: | Symposium (International) on Combustion (24. 1992. Sydney) |
Event Dates: | 5-10 Jul 1992 |
Event Location: | Sydney |
Title of Book: | Twenty-Fourth Symposium (International) on Combustion |
Date: | 1992 |
ISBN: | 0082-0784 |
Subjects: | |
Faculty: | E.T.S.I. Aeronáuticos (UPM) |
Department: | Motopropulsión y Termofluidodinámica [hasta 2014] |
Creative Commons Licenses: | Recognition - No derivative works - Non commercial |
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The vorticity dynamics in the near field of laminar (Re = 103) co-flowing jets subjected to the single or combined effeets of axial and azimuthal forcing is analyzed. It is shown that the interaction of the three-dimensional vortex structure resulting from the growth of the two and three-dimensional instabilities may result in large changes in the entrainment and mixing characteristics of the jet. For each azimuthal forcing, and for a fixed velocity ratio between the inner and outer jet, we show the existence of several instability modes leading to a pattern of lateral ejections of closed vortex loops. These modes and their topological changes are analyzed in view of the three-dimensional inviscid induction of the two concentric array of vortex rings emanating from the j e t s exit nozzle. For the case of methane-air diffusion flames, fiow visualizations revealed the existence of qualitatively similar patterns of closed fíame cells and fingers.
Item ID: | 1293 |
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DC Identifier: | https://oa.upm.es/1293/ |
OAI Identifier: | oai:oa.upm.es:1293 |
Deposited by: | Biblioteca ETSI Aeronauticos |
Deposited on: | 12 Jan 2009 |
Last Modified: | 20 Apr 2016 06:46 |