Ultra-fast X-ray particle velocimetry measurements within an abrasive water jet

Ultra-fast X-ray particle velocimetry measurements within an abrasive water jet Ultra-fast X-ray velocimetry measurements were taken to measure velocities and spatial positions of individual abrasive particles within the solid–liquid–gaseous three-phase flow of a high-pressure injection method–based abrasive water jet (AWJ). A synchrotron X-ray source provided sufficient photon flux to take double-frame images of the AWJ with an inter-frame time interval of 5 μs. Abrasive particles with a Sauter mean diameter of 265.5 μm were detected by a scintillator optically coupled to a gated image intensifier and a high-speed camera running at a frame rate of 11,250 Hz. A commercially available particle tracking velocimetry software was used to process the acquired images and evaluate the spatial positions and velocities of abrasive particles as a function of water pressure and abrasive mass flow. The acquired data show a Gaussian radial distribution of abrasive particles within the AWJ and an almost uniform mean axial velocity, irrespective of water jet velocity and abrasive flow rates. These results are useful to validate theoretical models for the momentum/energy transfer in AWJ, to provide input for abrasion/erosion models, to further understand and advance the AWJ process, and to develop new process opportunities such as AWJ milling. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Experiments in Fluids Springer Journals

Ultra-fast X-ray particle velocimetry measurements within an abrasive water jet

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Copyright © 2013 by Springer-Verlag Berlin Heidelberg
Engineering; Engineering Fluid Dynamics; Fluid- and Aerodynamics; Engineering Thermodynamics, Heat and Mass Transfer
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