STUDY OF CAVITATION PHENOMENON FOR A MICRO PILLAR IN A CHANNEL

Yingying Wang
Department of Mechanical and Aerospace Engineering, University of Central Florida, Orlando, FL 32816, United States

Hanieh Tabkhi
The University of Central Florida, Orlando, Florida 32826, USA

Yoav Peles
Rensselaer Polytechnic Institute, 110, 8th Street, Troy NY, 12180-3590; University of Central Florida Department of Mechanical and Aerospace Engineering Pegasus Blvd., P.O. Box 162450, Orlando, FL 32816-245012760, USA

DOI: 10.1615/TFEC2017.mns.017515
pages 2595-2598

摘要

Flow visualization and measurements of hydrodynamic cavitation were carried out in a rectangular (22 mm long, 1.5 wide and, 225 μm high) for a 150 μm diameter micro pillar inside. Distilled water was used as working fluid and pressure difference between inlet and outlet tanks utilized as the driving force to produce cavitation. High-speed camera captured cavitation starting from inception to an elongated one. Stochastic nature of phenomenon resulted in significant delays in witnessing cavitation for all experimental runs which may be attributed the dominance of surface tension force at this scale. Almost constant incipient cavitation numbers were achieved and no tangible dependency between cavitation inception number and pressure difference across the channel was observed which agrees well with previous studies.