Journal of Fusion Energy

, 30:453 | Cite as

Experimental and Numerical Investigation of Electra KrF Laser Hibachi Foil Cooling with a Near-Wall Planar Jet

  • Bo Lu
  • Said I. Abdel-Khalik
  • Dennis L. Sadowski
  • Kevin G. Schoonover
Original Research


Repetitively pulsed operation (5 Hz) of the electra gas laser requires sufficient cooling of the transmission foils, which separate the vacuum diodes from the laser cell and is subject to excessive heat from the attenuation of electron beams. A new method adopting a near-wall, high-speed planar jet was proposed for the protection of the hibachi foil by enhanced convection heat transfer. The jet flows upwards and is parallel to the hibachi foil. Bench-top experiments simulating a single foil span between two neighboring supporting ribs were conducted. Jet velocities and surface heat fluxes were varied. Experimental Nusselt numbers were correlated as dependent on jet Reynolds number and normalized distance from the jet exit. CFD simulations were also performed, where good agreement was observed between the experiments and simulations. The study shows that the planar jet enhances heat transfer from the surface but with decreasing heat transfer coefficients downstream, which indicates that the foil is not cooled uniformly with a single planar jet.


Inertial fusion energy Gas laser Hibachi cooling Heat transfer enhancement Planar jet 



Financial support by the Naval Research Laboratory is acknowledged.


  1. 1.
    J.D. Sethian et al., Phys. Plasmas 10, 2142 (2003)ADSCrossRefGoogle Scholar
  2. 2.
    P.M. Burns et al., Fusion Sci. Technol. 52, 445 (2007)MathSciNetGoogle Scholar
  3. 3.
    F. Hegeler et al., in Proceedings of 15th IEEE International Pulsed Power Conference (Monterey, California, June 13–17, 2005)Google Scholar
  4. 4.
    F. Hegeler et al., IEEE T. Plasma Sci. 36, 778 (2008)ADSCrossRefGoogle Scholar
  5. 5.
    P. Burns et al., Fusion Sci. Technol. 56, 346 (2009)Google Scholar
  6. 6.
    V. Novak et al., Fusion Sci. Technol. 47, 610 (2005)Google Scholar
  7. 7.
    V. Novak et al., Fusion Sci. Technol. 52, 483 (2007)Google Scholar
  8. 8.
    B. Lu et al., Fusion Sci. Technol. 56, 441 (2009)Google Scholar
  9. 9.
    P.M. Burns et al., Fusion Sci. Technol. 56, 341 (2009)Google Scholar
  10. 10.
    R.J. Goldstein, in Advances in Heat Transfer 7, 321, ed. by T.F. Irvine Jr, J.P. Harnett (Academic Press, New York, 1971)Google Scholar
  11. 11.
    D. Ballal, A. Lefebvre, J. Heat Trans. Serials C 95, 265 (1973)CrossRefGoogle Scholar
  12. 12.
    J. Zhou, M. Salcudean, I. Gartshore, in Near-Wall Turbulent Flows (Elsevier Science Publisher, The Netherlands, 1993), pp. 377–386Google Scholar
  13. 13.
    L.S. Jansson, L. Davidson, E. Olsson, Numer. Heat Trans. Part A 25, 237 (1994)ADSCrossRefGoogle Scholar
  14. 14.
    A. Lefebvre, in Gas Turbine Combustion (Taylor and Francis, London, 1999), pp. 289–297Google Scholar
  15. 15.
    C. A. Cruz, A. W. Marshall, in Proceedings of 40th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit (Fort Lauderdale, Florida, July11–14 2004)Google Scholar
  16. 16.
    C.A. Cruz, A.W. Marshall, J. Thermophys. Heat Trans. 21, 181 (2007)CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  • Bo Lu
    • 1
    • 2
  • Said I. Abdel-Khalik
    • 2
  • Dennis L. Sadowski
    • 2
  • Kevin G. Schoonover
    • 2
  1. 1.Institute of Plasma PhysicsChinese Academy of SciencesHefeiChina
  2. 2.G. W. Woodruff School of Mechanical EngineeringGeorgia Institute of TechnologyAtlantaUSA

Personalised recommendations