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Numerical simulation of temperature and velocity fields in plasma spray

  • Fan Qun-bo  (范群波)Email author
  • Wang Lu  (王 鲁)
  • Wang Fu-chi  (王富耻)
Article

Abstract

Based on the turbulence jet model, with respect to Ar-He mixture plasma gas injecting to ambient atmosphere, the temperature filed and velocity field under typical working conditions were investigated. Given the conditions of I=900 A, FAr = 1.98 m3/h, FHe = 0.85 m3/h, it is found that both the temperature and the velocity undergo a plateau region near the nozzle exit (0–10 mm) at the very first stage, then decrease abruptly from initial 13 543 K and 778.2 m/s to 4 000 K and 260.0 m/s, and finally decrease slowly again. Meanwhile, the radial temperature and radial velocity change relatively slow. The inner mechanism for such phenomena is due to the complex violent interaction between the high-temperature and high-velocity turbulent plasma jet and the ambient atmosphere. Compared with traditional methods, the initial working conditions can be directly related to the temperature and velocity fields of the plasma jet by deriving basic boundary conditions.

Key words

plasma spray plasma jet temperature field velocity field 

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References

  1. [1]
    FINCKE J R, SWANK W D, BEWLE R L, et al. Diagnostics and control in the thermal spray process [J]. Surface and Coatings Technology, 2001, 146–147: 537–543CrossRefGoogle Scholar
  2. [2]
    ECKER E R G, PFENDER E. Advances in Plasma Heat Transfer[M]. New York: Academic Press, 1967.Google Scholar
  3. [3]
    LEE Yung-cheng. Modeling Work in Thermal Plasma Process[D]. Minneapolis: University of Minnesota, 1984.Google Scholar
  4. [4]
    CHEN Xi. Heat Transfer and Flow of High-temperature Ionic Gas[M]. Beijing: Science Press, 1993. (in Chinese)Google Scholar
  5. [5]
    CHANG C H, RAMSHAW J D. Modeling of nonequilibrium effects in a high-velocity nitrogen-hydrogen plasma jet[J]. Plasma Chemistry and Plasma Processing, 1996, 16(s1): 5–17.CrossRefGoogle Scholar
  6. [6]
    DUSSOUBS B, FAUCHAIS P, VARDELLE A, et al. Computational analysis of a three-dimensional plasma spray jet[C]// XXIII International Conference on Phenomena in Ionized Gases, Toulouse: Centre de Phys Plasmas et leurs Applications de Toulouse, 1997, 2: 158–159.Google Scholar
  7. [7]
    NISHIYAMA H, KUZUHARA M, SOLONENKO O P, et al. Numerical modeling of an impinging dusted plasma jet controlled by a magnetic field in a low pressure[C]// Proceeding of the International Thermal Spray Conference. Nice: ASM International, 1998: 451–456.Google Scholar
  8. [8]
    DUSSOUBS B, VARDELLE A, MARIAUX G, et al. Modeling of plasma spraying of two powders[J]. Journal of Thermal Spray Technology, 2001, 10(1): 105–110.CrossRefGoogle Scholar
  9. [9]
    CHEN Ke-fa, FAN Jian-ren. Theory and Calculation of Engineering Gas-solid Multi-phase Fluid[M]. Hangzhou: Zhejiang University Press, 1990. (in Chinese)Google Scholar
  10. [10]
    XIE Hong. Theory and Experimental Study of Plasma Jet with Particles[D]. Beijing: Tsinghua University, 1988. (in Chinese)Google Scholar
  11. [11]
    SU Bin-zhi. Flow and Heat Transfer of Thermal Plasma[D]. Beijing: Tsinghua University, 1988. (in Chinese)Google Scholar
  12. [12]
    FAN Qun-bo, WANG Lu, WANG Fu-chi. Numerical simulation of basic parameters in plasma spray[J]. Journal of Beijing Institute of Technology, 2004, 13(1): 80–84.Google Scholar
  13. [13]
    SCHLICHTING H, GERSTEN K, KRAUSE E, et al. Boundary-Layer Theory[M]. New York: Springer-Verlag, 2000.CrossRefGoogle Scholar

Copyright information

© Central South University Press, Sole distributor outside Mainland China: Springer 2007

Authors and Affiliations

  • Fan Qun-bo  (范群波)
    • 1
    Email author
  • Wang Lu  (王 鲁)
    • 1
  • Wang Fu-chi  (王富耻)
    • 1
  1. 1.School of Materials Science and EngineeringBeijing Institute of TechnologyBeijingChina

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