Near-Field Spray Characterization in a Pressurized Environment using High-Speed X-ray Imaging

ORAL

Abstract

Sprays are commonly found in many industrial applications, from chemical applications for agricultural use to fuel injection in gas turbine engines to powder formation for 3D printing. Many of the processes like fuel injection occur in a pressurized ambient environment. Experimental visualization of the spray near-field region under these conditions is extremely challenging. To study high-pressure atomization, a Chamber for Assorted Pressurized Spray sUrveiLlancE, or CAPSULE, has been installed at the Advanced Photon Source (APS) at Argonne National Laboratory to perform high-speed X-ray flow visualization of the spray near-field. An airblast coaxial two-fluid atomizer was used in this study and white beam X-ray imaging focused on the nozzle exit. High-speed X-ray imaging revealed different atomization conditions as the swirl ratio, momentum flux ratio, and ambient pressure were increased. The variations were quantified through image analysis, which is only possible in the spray near-field with X-ray imaging.

*This work was sponsored by the Office of Naval Research (ONR) as part of the Multidisciplinary University Research Initiatives (MURI) Program, under grant number N00014-16-1-2617. The Photron SA-Z camera was purchased as part of the ONR DURIP program, under grant number N00014-18-1-2380. The views and conclusions contained herein are those of the authors only and should not be interpreted as representing those of ONR, the U.S. Navy, or the U.S. Government. This work was performed at the 7-BM beamline of the Advanced Photon Source, a U.S. Department of Energy (DOE) Office of Science User Facility operated for the DOE Office of Science by Argonne National Laboratory under Contract No. DE-AC02-06CH11357. The use of their facilities and personnel is greatly appreciated.

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Presenters

  • Theodore J Heindel

    • Iowa State University

Authors

  • Timothy C Dahlstrom

    • Iowa State University

  • Timothy B Morgan

    • Iowa State University

  • Alan L Kastengren

    • Argonne National Laboratory

  • Theodore J Heindel

    • Iowa State University