BW Pearce
YOU?
Author Swipe
View article: Cavitation nucleation dynamics in structured turbulence
Cavitation nucleation dynamics in structured turbulence Open
The effect of nucleation on cavitation inception in a high-Reynolds-number von Kármán wake from a bluff two-dimensional hydrofoil is studied experimentally in a variable pressure water tunnel. Nucleation effects are studied by seeding the …
View article: Ventilated supercavitating hydrofoils for ride control of high-speed craft
Ventilated supercavitating hydrofoils for ride control of high-speed craft Open
An investigation into the hydrodynamic performance and flow field characteristics of a novel high-speed supercavitating hydrofoil concept proposed by Elms (1999) is presented. The hydrofoil is wedge-shaped with a supercavity detaching from…
View article: Nucleation effects on cloud cavitation about a hydrofoil
Nucleation effects on cloud cavitation about a hydrofoil Open
The dynamics of cloud cavitation about a three-dimensional hydrofoil are investigated experimentally in a cavitation tunnel with depleted, sparse and abundant free-stream nuclei populations. A rectangular planform, NACA 0015 hydrofoil was …
View article: Nucleation effects on cavitation about a sphere
Nucleation effects on cavitation about a sphere Open
The influence of nucleation on cavitation about a sphere from inception through to supercavitation at a transcritical Reynolds number of $1.5\times 10^{6}$ is investigated experimentally. Two extreme free-stream nuclei populations, deplete…
View article: The influence of fluid–structure interaction on cloud cavitation about a rigid and a flexible hydrofoil. Part 3
The influence of fluid–structure interaction on cloud cavitation about a rigid and a flexible hydrofoil. Part 3 Open
Experimental studies of the influence of fluid–structure interaction on cloud cavitation about a stiff stainless steel (SS) and a flexible composite (CF) hydrofoil have been presented in Parts I (Smith et al. , J. Fluid Mech. , vol. 896, 2…
View article: Cavitation in tip-leakage flows
Cavitation in tip-leakage flows Open
Cavitation inception and the topology of developed cavities in tip leakage flow, for a hydrofoil with a square edged tip, have been investigated in a water tunnel using for the naturally occurring nuclei population. The experiments were pe…
View article: Microbubble disperse flow about a lifting surface
Microbubble disperse flow about a lifting surface Open
The effect of freestream nuclei content on stablecavitation about a hydrofoil and subsequent microbubbleproduction in the wake is investigated experimentally. Microbubble concentrations are measured upstream anddownstream of the hydrofoil …
View article: The Influence of Nucleation on the Spectral Content of Cloud Cavitation About a Hydrofoil
The Influence of Nucleation on the Spectral Content of Cloud Cavitation About a Hydrofoil Open
The influence of nucleation on the spectral content of cloud cavitation is investigated using unsteady force measurements and simultaneous high-speed imaging of a rectangular planform NACA-0015 section hydrofoil, with and without upstream …
View article: Towards Real-Time Optical Measurement of Microbubble Content in Hydrodynamic Test Facilities
Towards Real-Time Optical Measurement of Microbubble Content in Hydrodynamic Test Facilities Open
Real-time measurement of microbubble concentrations is desirable in order to inform experimental results, particularly in studies of cavitation physics. To develop these capabilities a controlled experiment using a micro-fluidic T-junction…
View article: Global Mode Visualization in Cavitating Flows
Global Mode Visualization in Cavitating Flows Open
A technique for visualising global frequency modes and phasing information is presented using fast Fourier transforms applied to individual pixel intensities of high-speed photography image frames. A singular value decomposition is applied…
View article: Supplementary material from "Wavelet analysis techniques in cavitating flows"
Supplementary material from "Wavelet analysis techniques in cavitating flows" Open
Cavitating and bubbly flows involve a host of physical phenomena and processes ranging from nucleation, surface and interfacial effects, mass transfer via diffusion and phase change to macroscopic flow physics involving bubble dynamics, tu…
View article: Material Bend-Twist Coupling Effects on Cavitating Response of Composite Hydrofoils
Material Bend-Twist Coupling Effects on Cavitating Response of Composite Hydrofoils Open
The objective of this work is to investigate the effects of material bend-twist coupling on the cavitating response of adaptive composite hydrofoils. Experimental results are shown for two composite hydrofoils and one stainless steel (SS) …
View article: An Experimental Study of Unsteady Behaviour of Cavity Flow Over a 2-D Wall-Mounted Fence
An Experimental Study of Unsteady Behaviour of Cavity Flow Over a 2-D Wall-Mounted Fence Open
The unsteady behaviour of ventilated and natural cavity flows over a 2-D wall-mounted fence is investigated for fixed length cavities with varying free-stream velocity using still imaging, X-ray densitometry and dynamic surface pressure me…
View article: The Influence of Fluid-Structure Interaction on Cloud Cavitation About a Hydrofoil
The Influence of Fluid-Structure Interaction on Cloud Cavitation About a Hydrofoil Open
The dynamics of cloud cavitation about rigid and flexible 3D hydrofoils is investigated in a cavitation tunnel. The two hydrofoils have identical undeformed geometry of tapered planform, NACA-0009 section and cantilevered setup at the hydr…
View article: The influence of nuclei content on cloud cavitation about a hydrofoil
The influence of nuclei content on cloud cavitation about a hydrofoil Open
The dynamics of cloud cavitation about a 3D hydrofoil are investigated experimentally in a cavitation tunnel with both an abundance and dearth of freestream nuclei. The rectangular-planform, NACA 0015 hydrofoil was tested at a Reynolds num…
View article: Joint research between Australia and Japan on the cavitation inception of marine propellers and control surfaces
Joint research between Australia and Japan on the cavitation inception of marine propellers and control surfaces Open
International defence research collaboration between regional allies fosters the symbiotic development of scientific expertise and enables benchmarking of techniques and results. On 1 December 2015, Australia's Minister of Defence and Japa…
View article: The influence of bend-twist coupling on the dynamic response of cavitating composite hydrofoils
The influence of bend-twist coupling on the dynamic response of cavitating composite hydrofoils Open
Cavity shedding frequencies and structural response of a rigid metal hydrofoil and two flexible composite hydrofoils are investigated in a cavitation tunnel. All three hydrofoils have identical geometry with a trapezoidal planform, span of…
View article: Cloud cavitation behaviour on a hydrofoil due to fluid-structure interaction
Cloud cavitation behaviour on a hydrofoil due to fluid-structure interaction Open
Despite recent extensive research into fluid-structure interaction (FSI) of cavitating hydrofoils there remains insufficient experimental data to explain many of these observed phenomena. The cloud cavitation behaviour around a hydrofoil d…
View article: The influence of nucleation on cloud cavitation about a sphere
The influence of nucleation on cloud cavitation about a sphere Open
The influence of nucleation on cloud cavitation about a sphere is investigated using simultaneous high-speed photography and high-frequency surface pressure measurements. The 0.15 m diameter PVC sphere was located on the axial centreline o…
View article: Experimental Investigation of Ventilated Cavity Flow Over a 3D Wall Mounted Fence
Experimental Investigation of Ventilated Cavity Flow Over a 3D Wall Mounted Fence Open
International audience
View article: Microbubble generation for PIV seeding
Microbubble generation for PIV seeding Open
A new device for microbubble generation using small-scale unsteady cavitation of supersaturated water is presented. Cavitation is created in a radial diffuser with a directed outlet for inlet/saturation pressures ranging from 300 to 1000 k…
View article: Leading edge interfacial phenomena of sheet and cloud cavitation
Leading edge interfacial phenomena of sheet and cloud cavitation Open
The formation and dynamics of cavity leading edge cell-like structures on a NACA 16-029 section hydrofoil has been investigated for a range of Reynolds numbers for stable (supercavitation) and shedding cavities (cloud cavitation). Optical …
View article: Experimental Investigation of Ventilated Cavity Flow over a Wall Mounted Fence
Experimental Investigation of Ventilated Cavity Flow over a Wall Mounted Fence Open
Ventilated cavity flow over a 3-D wall mounted fence is experimentally investigated in a cavitation tunnel. The influence of air ventilation rate, fence height based Froude number and vapour pressure based cavitation number on the resultin…
View article: Influence of pressure on microbubble production rate in a confined turbulent jet
Influence of pressure on microbubble production rate in a confined turbulent jet Open
The size spectra and production frequency of microbubbles generatedwithin a confined turbulent jet from the expansion of supersaturatedwater are characterized by optical measurement.The generated microbubble plume is homogeneously disperse…
View article: Development of a cavitation susceptibility meter for nuclei size distribution measurements
Development of a cavitation susceptibility meter for nuclei size distribution measurements Open
Cavitation inception in practical flows is invariably heterogeneous as nucleation sites are provided by microbubble populations. Microbubbles grow explosively, filling with vapour, when exposed to a critical pressure which is size dependen…
View article: Bubble breakup in a turbulent shear layer
Bubble breakup in a turbulent shear layer Open
The breakup of a millimetre size buoyantly rising bubble encountering a horizontalplane turbulent jet is experimentally investigated using high-speed shadowgraphy and acoustictechniques. The bubble diameter to jet height ratio is 0.75 and …