Measurement of air entrainment in plasma jets [electronic resource].
- Washington, D.C. : United States. Office of the Assistant Secretary for Nuclear Energy, 1990. and Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
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- Pages: (6 pages) : digital, PDF file
- Additional Creators:
- United States. Office of the Assistant Secretary for Nuclear Energy and United States. Department of Energy. Office of Scientific and Technical Information
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- Free-to-read Unrestricted online access
- The concentration and temperature of air entrained into argon and helium plasma jets has been measured using coherent anti-Stokes Raman spectroscopy (CARS). The argon plasma flow field is characterized by a short region of well behaved laminar flow near the nozzle exit followed by an abrupt transition to turbulence. Once the transition of turbulence occurs, air is rapidly mixed into the jet core. The location of the transition region is determined by the rapid cooling of the jet and the resulting increase in Reynolds number. In contrast, the helium plasma flow field never exceeds a Reynolds number of 200 and remains laminar. The entrainment process in this case is controlled by molecular diffusion rather than turbulent mixing. 9 refs., 5 figs., 1 tab.
- Published through SciTech Connect., 01/01/1990., "egg-m-89488", " conf-900520--1", "DE91001943", 3. national thermal spray conference and exposition, Long Beach, CA (USA), 21-24 May 1990., Fincke, J.R.; Rodriquez, R.; Pentecost, C.G., and EG and G Idaho, Inc., Idaho Falls, ID (USA)
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