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- Publisher Website: 10.1007/BF00190911
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Article: Coherent structure interactions in an unexcited coaxial jet
Title | Coherent structure interactions in an unexcited coaxial jet |
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Authors | |
Issue Date | 1994 |
Citation | Experiments in Fluids, 1994, v. 17, n. 3, p. 147-157 How to Cite? |
Abstract | Based on a double triggering criterion, the axisymmetric and azimuthal structures within the initial region of an unexcited coaxial jet of mean velocity ratio of 0.3 (inner to outer) were recovered. Outer vortices, two trains of inner vortices and their amalgamation are found in the outer and inner mixing regions. Bifurcation of the amalgamated inner vortices occurs within the first two diameters of the jet and is responsible for the occurrence of the azimuthal structures in the inner jet region further downstream. Co-dominance of the symmetrical and azimuthal structures having different convection velocities is observed in the fully merged zone. Spatial separation between vortical structures and their relative vorticities are important parameters in affecting their convection velocities, growth and decay. © 1994 Springer-Verlag. |
Persistent Identifier | http://hdl.handle.net/10722/250361 |
ISSN | 2023 Impact Factor: 2.3 2023 SCImago Journal Rankings: 0.848 |
DC Field | Value | Language |
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dc.contributor.author | Tang, S. K. | - |
dc.contributor.author | Ko, N. W M | - |
dc.date.accessioned | 2018-01-16T06:33:46Z | - |
dc.date.available | 2018-01-16T06:33:46Z | - |
dc.date.issued | 1994 | - |
dc.identifier.citation | Experiments in Fluids, 1994, v. 17, n. 3, p. 147-157 | - |
dc.identifier.issn | 0723-4864 | - |
dc.identifier.uri | http://hdl.handle.net/10722/250361 | - |
dc.description.abstract | Based on a double triggering criterion, the axisymmetric and azimuthal structures within the initial region of an unexcited coaxial jet of mean velocity ratio of 0.3 (inner to outer) were recovered. Outer vortices, two trains of inner vortices and their amalgamation are found in the outer and inner mixing regions. Bifurcation of the amalgamated inner vortices occurs within the first two diameters of the jet and is responsible for the occurrence of the azimuthal structures in the inner jet region further downstream. Co-dominance of the symmetrical and azimuthal structures having different convection velocities is observed in the fully merged zone. Spatial separation between vortical structures and their relative vorticities are important parameters in affecting their convection velocities, growth and decay. © 1994 Springer-Verlag. | - |
dc.language | eng | - |
dc.relation.ispartof | Experiments in Fluids | - |
dc.title | Coherent structure interactions in an unexcited coaxial jet | - |
dc.type | Article | - |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1007/BF00190911 | - |
dc.identifier.scopus | eid_2-s2.0-0000447695 | - |
dc.identifier.hkuros | 2264 | - |
dc.identifier.volume | 17 | - |
dc.identifier.issue | 3 | - |
dc.identifier.spage | 147 | - |
dc.identifier.epage | 157 | - |
dc.identifier.eissn | 1432-1114 | - |
dc.identifier.issnl | 0723-4864 | - |