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Control of cloud cavitation through microbubbles
conference contribution
posted on 2023-05-23, 15:08 authored by James VenningJames Venning, Bryce PearceBryce Pearce, Paul BrandnerPaul BrandnerThe dynamics of cloud cavitation about a 3D hydrofoil are investigated experimentally in a cavitation tunnel with deplete, sparse and abundant freestream nuclei populations. The rectangular-planform, NACA 0015 hydrofoil was tested at a Reynolds number of 1.4 × 106, an incidence of 6◦ and a cavitation number of 0.55. High-speed photography of cavitation shedding phenomena was acquired simultaneously with unsteady force measurement to enable identification of cavity shedding modes corresponding with force spectral peaks. Nuclei populations were varied through the injection of polydisperse microbubbles. Both the deplete and abundant cases were characterised by large-scale cloud cavitation. For a sparsely seeded flow, however, coherent fluctuations are significantly reduced due to random nuclei activation and cavity breakup resulting in minimum relative unsteady lift.
History
Publication title
Proceedings of the 22nd Australasian Fluid Mechanics Conference AFMC2020Editors
H Chanson and R BrownPagination
1-4ISBN
9781742723419Department/School
Australian Maritime CollegePublisher
The University of QueenslandPlace of publication
BrisbaneEvent title
22nd Australasian Fluid Mechanics Conference AFMC2020Event Venue
Brisbane, AustraliaDate of Event (Start Date)
2020-12-07Date of Event (End Date)
2020-12-10Repository Status
- Restricted