Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/52487
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Type: | Journal article |
Title: | The naturally oscillating flow emerging from a fluidic precessing jet nozzle |
Author: | Wong, C. Nathan, G. Kelso, R. |
Citation: | Journal of Fluid Mechanics, 2008; 606:153-188 |
Publisher: | Cambridge Univ Press |
Issue Date: | 2008 |
ISSN: | 0022-1120 1469-7645 |
Statement of Responsibility: | Chong Y. Wong, Graham J. Nathan and Richard M. Kelso |
Abstract: | Phase-averaged and directionally triggered digital particle image velocimetry measurements were taken in longitudinal and transverse planes in the near field of the flow emerging from a fluidic precessing jet nozzle. Measurements were performed at nozzle inlet Reynolds and Strouhal numbers of 59000 and 0.0017, respectively. Results indicate that the jet emerging from the nozzle departs with an azimuthal component in a direction opposite to that of the jet precession. In addition, the structure of the ‘flow convergence’ region, reported in an earlier study, is better resolved here. At least three unique vortex-pair regions containing smaller vortical ‘blobs’ are identified for the first time. These include a vortex-pair region originating from the foci on the downstream face of the nozzle centrebody, a vortex-pair region shed from the edge of the centrebody and a vortex-pair region originating from the downstream surface of the nozzle exit lip. |
Rights: | © Cambridge University Press 2008 |
DOI: | 10.1017/S0022112008001699 |
Published version: | http://dx.doi.org/10.1017/s0022112008001699 |
Appears in Collections: | Aurora harvest Environment Institute Leaders publications Mechanical Engineering publications |
Files in This Item:
File | Description | Size | Format | |
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hdl_52487.pdf | Published version | 9.01 MB | Adobe PDF | View/Open |
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