2015 CAV - Pearce_Brandner_Foster.pdf (1.21 MB)
Download fileVentilated cavity flow over a backward-facing step
conference contribution
posted on 2023-05-23, 10:50 authored by Bryce PearceBryce Pearce, Paul BrandnerPaul Brandner, Foster, SJVentilated cavities detaching from a backward facing step (BFS) 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 6.6 to 44 × 103 were tested giving boundary layer thickness to step height ratios from 1.25 to 3.8. A range of cavity lengths were obtained by variation of the ventilation flow rate for several freestream Reynolds numbers. Cavity length to step height ratios from 20 to 80 were achieved. Cavity length was found to be linearly dependent on ventilation rate and to decrease with increasing boundary layer thickness and/or Reynolds number. This result may have implications in the practical optimization of these flows which occur in applications such as drag reduction on marine hull forms.
History
Publication title
Journal of Physics Conference Series: 9th International Symposium on CavitationVolume
656Pagination
1-4ISSN
1742-6588Department/School
Australian Maritime CollegePublisher
Institute of Physics Publishing LtdPlace of publication
United KingdomEvent title
9th International Symposium on CavitationEvent Venue
Lausanne, SwitzerlandDate of Event (Start Date)
2015-12-06Date of Event (End Date)
2015-12-10Rights statement
Creative Commons Attribution 3.0 licenceRepository Status
- Open