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An experimental investigation of the optical measurement of microbubbles in a confined radial jet
conference contribution
posted on 2023-05-23, 10:51 authored by Trump, MC, De Graaf, KL, Bryce PearceBryce Pearce, Paul BrandnerPaul BrandnerAn experimental shadowgraphy setup and procedure has been designed to investigate microbubble size distribution and production frequency of a mini-tube type microbubble generator as implemented in the Australian Maritime College Cavitation Research Laboratory. To overcome the depth-of-field limitations of traditional shadowgraphy setups, the present study uses a radial diffuser to reduce the depth of the test volume to 1 mm, allowing all bubbles to be imaged within the acceptable plane of focus. Shadowgraphy measurements are made of a microbubble plume, injected into a uniform, low-turbulence dilution flow to homogeneously disperse the microbubbles. Bubble shadows are created with stroboscopic lighting and recorded with a highresolution digital camera and close-range microscope. Results show that the dominant size interval for the microbubble generator used in the current study is 10–15 μm, with a total production frequency of 1454 kHz.
History
Publication title
Proceedings of the 7th Australian Conference on Laser Diagnostics in Fluid Mechanics and CombustionEditors
DR Honnery, D Edgington-MitchellPagination
29-34ISBN
978-0-646-94892-8Department/School
Australian Maritime CollegePublisher
Monash UniversityPlace of publication
Melbourne, AustraliaEvent title
7th Australian Conference on Laser Diagnostics in Fluid Mechanics and CombustionEvent Venue
Melbourne, AustraliaDate of Event (Start Date)
2015-12-09Date of Event (End Date)
2015-12-11Rights statement
Copyright unknownRepository Status
- Restricted