eCite Digital Repository
The effect of boundary layer thickness on cavity flow over a backward-facing step
Citation
Pearce, BW and Brandner, PA and Foster, SJ and Zarruk, GA, The effect of boundary layer thickness on cavity flow over a backward-facing step, The Proceedings of the 19th Australasian Fluid Mechanics Conference, 8-11 December, Melbourne, Australia, pp. 1-4. ISBN 978-0-646-59695-2 (2014) [Refereed Conference Paper]
 | PDF (AFMC paper 129) 424Kb |
Copyright Statement
Copyright 2014 Australasian Fluids Mechanics Society
Official URL: http://afms.org.au/proceedings.html#proceedings
Abstract
Ventilated cavities detaching from a backward facing step are
investigated for a range of upstream boundary layer thicknesses
in a cavitation tunnel. The upstream turbulent boundary layer
thickness is varied by artificial thickening of the test section natural
boundary layer using an array of transversely injected jets.
Momentum thickness Reynolds numbers from 8.5 to 28×103
were tested giving boundary layer thickness to step height ratios
from 1.25 to 3.8. A range of cavitation numbers (based on the
cavity pressure) were obtained by variation of the ventilation
flow rate for fixed freestream Reynolds and cavitation numbers.
Cavity length to step height ratios from 15 to 60 were achieved.
Cavity length was found to be linearly dependent on ventilation
rate and to decrease with increasing boundary layer thickness.
This result may have implications in the practical optimization
of these flows which occur in applications such as drag reduction
on marine hull forms.
Item Details
| Item Type: | Refereed Conference Paper |
|---|---|
| Keywords: | cavity backwards step |
| Research Division: | Engineering |
| Research Group: | Maritime engineering |
| Research Field: | Ocean engineering |
| Objective Division: | Expanding Knowledge |
| Objective Group: | Expanding knowledge |
| Objective Field: | Expanding knowledge in engineering |
| UTAS Author: | Pearce, BW (Dr Bryce Pearce) |
| UTAS Author: | Brandner, PA (Professor Paul Brandner) |
| UTAS Author: | Foster, SJ (Mr Samuel Foster) |
| UTAS Author: | Zarruk, GA (Dr Gustavo Zarruk Serrano) |
| ID Code: | 97594 |
| Year Published: | 2014 |
| Deposited By: | NC Maritime Engineering and Hydrodynamics |
| Deposited On: | 2014-12-29 |
| Last Modified: | 2018-04-05 |
| Downloads: | 71 View Download Statistics |
Repository Staff Only: item control page