Characteristics of flow regimes for two plates of rectangular cross-section in tandem
Date
2007
Authors
Blazewicz, A.
Bull, M.
Kelso, R.
Editors
Morgan, R.
Lemckert, C.
Lemckert, C.
Advisors
Journal Title
Journal ISSN
Volume Title
Type:
Conference paper
Citation
16 AFMC : proceedings of the sixteenth Australasian Fluid Mechanics Conference, 3-7 December, 2007, Gold Coast, Australia / Peter Jacobs ... [et al] (ed.), pp.930-934
Statement of Responsibility
A.M. Blazewicz, M.K. Bull and R.M. Kelso
Conference Name
Australasian Fluid Mechanics Conference (16th : 2007 : Gold Coast, Australia)
Abstract
Flow characteristics including velocity fluctuations, acoustic pressure fluctuations and surface pressures have been investigated for two plates in a tandem array at high Reynolds numbers. The plates were of rectangular cross section and of the same thickness, having and a range of chord-to-thickness ratios with a range of gap-to-thickness ratios between them. The flow measurements were complemented with hydrogen-bubble flow visualisation. A classification of possible flow regimes is proposed and confirmed experimentally. For very small separations the two plates behave as a single plate. Symmetrical vortex shedding is detected even for the configurations with larger separation. For the upstream plates in the single plate regime, where frequency components lower than the characteristic shedding frequency are present, these components are amplified in the presence of a downstream plate. They are clearly detectable in velocity and pressure measurements and can become dominant in the acoustic spectra.
School/Discipline
Dissertation Note
Provenance
Description
A.M. Blazewicz, M.K. Bull and R.M. Kelso