Exploration of Water Jets in Supersonic Crossflow Using X-Ray Diagnostics

Journal Article · 31 December 2019 · Atomization and Sprays

DOI: https://doi.org/10.1615/atomizspr.2020034448 · OSTI ID:1757975

Lin, Kuo-Cheng ^[1]; Kastengren, Alan L. ^[2]; Hammack, Stephen ^[3]; Carter, Campbell ^[3]

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1. Taitech, Inc., Beavercreek, OH (United States)
2. Argonne National Lab. (ANL), Argonne, IL (United States)
3. Air Force Research Lab. (AFRL), Wright-Patterson AFB, OH (United States)

Here, near-field structures of pure- and aerated-liquid jets injected into Mach 2 crossflow environments were experimentally investigated at the 7-BM beamline of the Advanced Photon Source at Argonne National Laboratory using high-speed shadowgraph imaging, high-speed x-ray imaging, and pathlength-integrated x-ray fluorescence. Liquid was flush injected into a blowdown supersonic wind tunnel. Test section top and side windows were fitted with a polycarbonate plate for high x-ray transmittance. An axisymmetric aerated-liquid injector was fitted with an exchangeable nozzle adaptor to generate a liquid jet. Water and nitrogen, the gas used for aerated-liquid jets, were doped with specially selected dopants to facilitate x-ray measurements. Liquid column structures for a pure-liquid jet, typically masked by dense droplet clouds in a supersonic crossflow environment, were visualized with the present x-ray imaging setup. Surface-wave formation, movement, and transformation on the column windward surface of the pure-liquid jet, along with column deformation and breakup processes, were qualitatively characterized. We measured time-averaged line-of-sight (LOS) liquid mass distributions within the liquid jet near fields. Cross-sectional liquid column contours of pure-liquid jets at various deformation stages were reconstructed from LOS liquid mass distributions. The pure-liquid jet deformed liquid column reached a maximum width of 1.47 times the orifice diameter before exhibiting rapid mass removal. We also observed the plume-crossing phenomenon in the aerated-liquid jet.

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL (United States)
• Sponsoring Organization: US Air Force Office of Scientific Research (AFOSR); USDOE Office of Science (SC), Basic Energy Sciences (BES)
• Grant/Contract Number: AC02-06CH11357
• OSTI ID: 1757975
• Journal Information: Atomization and Sprays, Journal Name: Atomization and Sprays Journal Issue: 5 Vol. 30; ISSN 1044-5110
• Publisher: Begell HouseCopyright Statement
• Country of Publication: United States
• Language: English