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The European Physical Journal Special Topics

, Volume 182, Issue 1, pp 145–159 | Cite as

Visualization of thermal cutting fluid flows

  • C.M. HackettEmail author
  • S. Garg
Article

Abstract

Outside of the fields where flow visualization is traditionally applied, there exist many processes where fluid phenomena are critical. Here, we survey flow visualization work with a focus on two thermal metal cutting processes. These two processes – plasma-arc cutting and gas assisted laser cutting – account for a large fraction of the means by which steel is cut in our world. Plasma-arc cutting utilizes an electric arc transferred between a cathode and the steel being cut to produce a high temperature gas jet that melts and removes metal. In gas assisted laser cutting, the assist jet is often high-pressure supersonic nitrogen for stainless steel, or near-atmospheric pressure, low-speed oxygen for carbon steel. Visualization of these millimeter-range diameter jets helps to understand the different roles that the assist gas has in these cutting processes, particularly with how the jets interact with the metal being cut. We describe experimental techniques for visualization of the arc jet and gas assist jet, as well as the liquid metal flows being removed from the cut and the gas flow in the torch itself. These visualizations overcome the small physical scales of the process, the bright illumination from the arc itself, and harsh high-temperature environment. The results lend perspective and understanding of the physical phenomena important to process control.

Keywords

European Physical Journal Special Topic Laser Cutting Schlieren Image Kerf Width Plenum Pressure 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    G.L. Brown, A. Roshko, J. Fluid Mech. 64, 775 (1974)CrossRefADSGoogle Scholar
  2. 2.
    M. Van Dyke, An Album of Fluid Motion (Parabolic Stanford, California, 1982)Google Scholar
  3. 3.
    W. Merzkirch, Flow Visualization, 2nd edn. (Academic, Orlando, Florida, 1987)Google Scholar
  4. 4.
    G.S. Settles, Schlieren and Shadowgraph Techniques: Visualizing Phenomena in Transparent Media (Springer, Berlin, 2001)Google Scholar
  5. 5.
    S. Sakuragi, Eng. Sci. Rep., Kyushu Univ., Japan 17, 229 (1995)Google Scholar
  6. 6.
    R.W. Couch, Jr., R.C. Dean, US Pat. 3,641,308 (1972)Google Scholar
  7. 7.
    R.W. Couch, Jr., N.A. Sanders, L. Luo, J. Sobr, P. Backander, US Pat. 5,317,126 (1994)Google Scholar
  8. 8.
    N.A. Sanders, R.W. Couch, Jr., US Pat. 4,861,962 (1989)Google Scholar
  9. 9.
    S. Ramakrishnan, M.W. Rogozinski, N.A. Sanders, R.W. Couch, Jr., in Proc. 11th Int. Conf. on Gas Discharges and Their Applications, Chuo Univ., Tokyo, 2 (1995), p. 268Google Scholar
  10. 10.
    W.S. Severance, D.G. Anderson, Welding J. 35 (1984)Google Scholar
  11. 11.
    F.H. Sasse, Welding J. 64 (1991)Google Scholar
  12. 12.
    Bethlehem Steel, Plasma Processes of Cutting and Welding (1976)Google Scholar
  13. 13.
    B.L. Bemis, G.S. Settles, An Experimental Investigation of Dross Formation in the Plasma Arc Cutting Process (Penn. State Univ., 1998)Google Scholar
  14. 14.
    P. Teulet, L. Girard, M. Razafinimanana, A. Gleizes, P. Bertrand, F. Camy-Peyret, E. Baillot, F. Richard, J. Phys. D: Appl. Phys. 39, 1557 (2006)CrossRefADSGoogle Scholar
  15. 15.
    S. Kim, Ph.D. thesis (Univ. Minnesota, 2009)Google Scholar
  16. 16.
    F. Yin, M.S. thesis (Univ. Minnesota, 1999)Google Scholar
  17. 17.
    J. Peters, M.S. thesis (Univ. Minnesota, 2003)Google Scholar
  18. 18.
    M. Pellecchia, Welding Design Fabrication 19 (1992)Google Scholar
  19. 19.
    S.E. Nielsen, Indust. Laser Rev. 11 (1997)Google Scholar
  20. 20.
    J. Fieret, M.J. Terry, B.A. Ward, in High Power Lasers (SPIE, Bellingham, Washington, USA) 801, 250 (1987)Google Scholar
  21. 21.
    G. Chryssolouris, W.C. Choi, in CO2 Lasers and Applications, edited by J.D. Evans, E.V. Locke 1042, 96 (SPIE, Bellingham, Washington, USA, 1989)Google Scholar
  22. 22.
    Y. Arata, H. Maruo, I. Miyamoto, S. Takeuchi, Trans. JWRI 8, 15 (1979)Google Scholar
  23. 23.
    I. Miyamoto, H. Maruo, Welding in the World, 29, 283 (1991)Google Scholar
  24. 24.
    F.O. Olsen, in Laser Materials Processing: Industrial and Microelectronics Applications, edited by E. Beyer, M. Cantello, A.V. La Rocca, L.D. Laude, F.O. Olsen and G. Sepold 2207, 413 (SPIE, Bellingham, Washington, USA, 1994)Google Scholar
  25. 25.
    A. Brandt, S.D. Scroggs, G.S. Settles, in Proc. 15th Int. Cong. Applications Lasers Electro-Optics (ICALEO96), Detroit, Michigan, USA, edited by W. Duley, K. Shibata, R. Poprawe (1997)Google Scholar
  26. 26.
    A.V. La Rocca, A.V., European Pat. 0705154B1 (1997)Google Scholar
  27. 27.
    W. Masuda, T. Nakamura, in Proc. of Laser Advanced Materials Processing–Science and Applications, Nagaoka, Japan, edited by A.Matsunawa, S.Katayama (1992), p. 613Google Scholar
  28. 28.
    W. Masuda, E. Moriyama, JSME Int. J. B 37, 769 (1994)Google Scholar
  29. 29.
    M.J. Adams, in Proc. Conf. Advance Welding Process, Br. Weld. Inst. (1970), p. 146Google Scholar
  30. 30.
    H. Zefferer, D. Petring, W. Schulz, F. Schneider, G. Herziger, in Proc. 11th Int. Cong. (Springer, Berlin, 1993), p. S.574Google Scholar
  31. 31.
    P. Yudin, O. Kovalev, J. Laser Appl. 21, 39 (2009)CrossRefADSGoogle Scholar
  32. 32.
    H. Zefferer, D. Petring, E. Beyer, Investigations of the Gas Flow in Laser Beam Cutting (DVS–Bericht 135, DVS-Verlag, Dusseldorf, 1991), p. 210Google Scholar
  33. 33.
    F.O. Olsen, Opto Electronik Mag. 4, 168 (1988)Google Scholar
  34. 34.
    D. Leidinger, D. Schuocker, in Proc. Gas Flow Chemical Lasers: 10th Int. Symp., Friedrichshafen, Germany, edited by W.L.Bohn, H.Huegel, SPIE2502, 577 (1995)Google Scholar
  35. 35.
    A. Brandt, G.S. Settles, J. Laser Applications 9, 269 (1997)Google Scholar
  36. 36.
    G.S. Settles, D.S. Dolling, in Tactical Missile Aerodynamics 104 (AIAA, Reston, Virginia, USA, 1986), p. 297Google Scholar

Copyright information

© EDP Sciences and Springer 2010

Authors and Affiliations

  1. 1.Hypertherm, Inc.Hanover, New HampshireUSA

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