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

Balz, R. ; Mokso, R. ; Narayanan, C. ; Weiss, D. ; Heiniger, K.

In: Experiments in Fluids, 2013, vol. 54, no. 3, p. 1-13

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    Titre
    • Ultra-fast X-ray particle velocimetry measurements within an abrasive water jet
    Auteur
    • Balz, R.. Institute of Thermal and Fluid Engineering, University of Applied Sciences Northwestern Switzerland, Klosterzelgstrasse 2, 5210, Windisch, Switzerland
    • Mokso, R.. Swiss Light Source, Paul Scherrer Institut, 5232, Villigen, Switzerland
    • Narayanan, C.. Institute of Thermal and Fluid Engineering, University of Applied Sciences Northwestern Switzerland, Klosterzelgstrasse 2, 5210, Windisch, Switzerland
    • Weiss, D.. Institute of Thermal and Fluid Engineering, University of Applied Sciences Northwestern Switzerland, Klosterzelgstrasse 2, 5210, Windisch, Switzerland
    • Heiniger, K.. Institute of Thermal and Fluid Engineering, University of Applied Sciences Northwestern Switzerland, Klosterzelgstrasse 2, 5210, Windisch, Switzerland
    Type de document
    • Postprint
    Classification
    • Technologie, Sciences de l'ingénieur
    Identifiant OAI-PMH
    • oai:doc.rero.ch:315753
    Summary
    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 5μs. Abrasive particles with a Sauter mean diameter of 265.5μm were detected by a scintillator optically coupled to a gated image intensifier and a high-speed camera running at a frame rate of 11,250Hz. 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