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https://hdl.handle.net/2440/105126
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Type: | Journal article |
Title: | The topology of a precessing flow within a suddenly expanding axisymmetric chamber |
Author: | Chen, X. Tian, Z. Kelso, R. Nathan, G. |
Citation: | Journal of Fluids Engineering, 2017; 139(7):071201-1-071201-10 |
Publisher: | ASME |
Issue Date: | 2017 |
ISSN: | 0098-2202 1528-901X |
Statement of Responsibility: | Xiao Chen, Zhao F. Tian, Richard M. Kelso, Graham J. Nathan |
Abstract: | A comprehensive study on the flow structure of an ensemble-averaged fluidic precessing jet (FPJ) flow is reported. This study is based on the concepts of critical point theory, previous experimental data, and validated simulation results. The unsteady k–ω shear stress transport (SST) turbulence model was adopted for the simulation, which provided high resolution flow details. The numerical model successfully reproduced the four main flow features of the FPJ flow. The predicted equivalent diameter and the centerline velocity of the phase-averaged FPJ flow were compared against the measured results and achieved reasonable agreement. The streamlines, velocity, and vorticity contours in a series of cross-sectional planes are presented. The calculated streamlines at the surfaces of the nozzle and the center-body (CB) are compared with previously deduced surface flow patterns. With these methods, a vortex skeleton with six main vortex cores of the FPJ flow within the nozzle is identified for the first time. This skeleton, which is illustrated diagramatically, is deduced to be responsible for the jet precession. |
Rights: | Copyright © 2017 by ASME |
DOI: | 10.1115/1.4035950 |
Grant ID: | http://purl.org/au-research/grants/arc/DP150102230 |
Published version: | http://dx.doi.org/10.1115/1.4035950 |
Appears in Collections: | Aurora harvest 7 Mechanical Engineering publications |
Files in This Item:
File | Description | Size | Format | |
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The topology of a precessing flow within a suddenly expanding axisymmetric chamber.pdf Restricted Access | Accepted version | 12.05 MB | Adobe PDF | View/Open |
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