Abstract
The characteristics of a pulsed plasma jet originating from an electrothermal capillary discharge have been investigated using laser-induced fluorescence (LIF) measurement. Previous emission spectroscopic measurements of a 3.1 kJ plasma jet show that upstream of the Mach disk the temperature and electron number density are about 14,000 K and 1017 cm−3, while downstream of the Mach disk the values are about 25,000 K and 1018 cm−3, respectively. However, these values are based on line-of-sight integrated measurements that may be misleading. Hence, LIF is being used to provide both spatially and temporally resolved measurements. Our recent work has been directed at using planar laser-induced fluorescence (PLIF) imaging of atomic copper in the plasma jet flow field. Copper is a good candidate for PLIF studies because it is present throughout the plasma and has electronic transitions that provide an excellent pump-detect strategy. Our PLIF results to date show that emission measurements may give a misleading picture of the flow Field, as there appears to be a large amount of relatively low temperature copper outside the barrel shock, which may lead to errors in temperature inferred from emission spectroscopy. In this paper, the copper LIF image is presented and at the moment, relative density of atomic copper, which is distributed in the upstream of the pulsed plasma jet, is discussed qualitatively.
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References
Abbett, M., 1971, “Mach Disk in Underexpanded Exhaust Plumes,”AIAA Journal, Vol. 9, No. 3, pp. 512–514.
Arnold, A., Bombach, R. and Kappeli, B., 2000, “Fuel-oil concentration in a gas turbine burner measured with laser-induced fluorescence,”Experiments in Fluids 29, 468.
Basner, R., Schmidt, M., Becker, K., Tarnovsky, V. and Deutsch, H., 2000, “Absolute Total and Partial Cross-Sections for the Electron Impact Ionization of TiC14,”Thin Solid Films, Vol. 374, pp. 292–297.
Cho, J. H., Han, S. H., Lee, Y. H., Kim, O. K., Kim, G. H., Kim, Y. W., Lim, H. E. and M. J. S, 2001, “The Measurement of Nitrogen Ion Species Ratio in Inductively Coupled Plasma Source Ion Implantation,”Surface and Coatings Technology, Vol. 136, pp. 106–110.
Case, M. E., Hofeldt, D. L., 1996, “Soot Mass Concentration Measurements in Diesel Engine Exhaust Using Laser-Induced Incandescence,”Aerosol Science and Technology 25, 46.
Crist, S., Sherman, P. M., and Glass, D. R., “Study of the Highly Underexpanded Sonic Jet,”AIAA Journal, Vol. 4, No. 1, pp. 68–71.
Eggins, P. L., and Jackson, D. A., 1974, “Laser Doppler Velocity Measurements in an Under-Expanded Free Jet,”Journal of Physics D: Applied Physics, Vol. 7, No. 14, pp. 1894–1906.
Erlich, J., Tsao, J. Y., 1989,Laser Microfabrication, in Thin Film Processes and Lithography (Academic, Boston), p. 587
Estler, R. C., Norgar, N. S., Muenchausen, R. E., Wu, X. D., Foltyn, S. and Garcia, A. R., 1991,Rev. Set Instrum. 62, 437.
Gilligan, J., Bourham, M., Hankins, O., Auciello, O., Tallavarjula, S., and Mohanti, R., 1991, “Studies to Reduce Material Erosion in Electrothermal Launchers,”IEEE Trans. Magnetics, Vol. 27, No. 1, pp. 476–481.
Hankins, O. E., Bourham, M. and Mann, D., 1997, “Observations of Visible Light Emission from Interactions between an Electrothermal Plasma and a Propellant,”IEEE Trans. Mag. 33, No. 1, pp. 295–298.
Hankins, O., Bourham, M., Earnhart, J. and Gilligan, J., 1993, “Visible light emission from a dense electrothermal launcher plasma,”IEEE Trans. Mag. 29, 1158.
Hopkins, J. B., Langridge-Smith, P. R. R., Morse, M. D. and Smally, R. E., 1983,J. chem. Phys. 78, 1627.
Klingenberg, G. and Heimerl, J. M., 1992, “Gun Muzzle Blast and Flash” Chap. 6. Progress in Astronautics and Aeronautics, Vol. 139.
Kohel, J. M., Su, L. K., Clemens, N. T., and Varghese, P. L., “Emission Spectroscopic Measurements and Analysis of a Pulsed Plasma Jet,”IEEE Trans. Magnetics, Vol. 35, No. 1, pp. 201–206.
Liepmann, H. W., and Roshko, A., 1957,Elements of Gas Dynamics, 1st ed., Wiley, New York.
Lyman, J. L., 1988, SPIE 1033, 446.
Macek, M., Navinsek, B., Panjan, P. and Kadlec, S., 2001, “A Study of Plasma Parameters in a BAI 730 M Triode Ion Plating System by Means of a Langmuir Probe and Plasma Mass and Energy Spectroscopy,”Surface and Coatings Technology, Vol. 135, pp. 208–220.
Mcenally, C. S., Pfefferle, L. D., 1998, “Species and Soot Concentration Measurements in a Methane/Air Nonpremixed Flame Doped With C4 Hydrocarbons,”Combustion and Flame, 115, 81.
Mulser, P., Sigel, R. and Witkowski, S., 1973,Phys. Rep. 6, 187.
Okuji, S., Sakudo, N., Hayashi, K., Okada, M., Onogawa, T., Maesaka, T., Nishiyama, Y., Komatsu, K., Toyoda, K., Yashima, S., Ishida, T. and Awazu, K., “Spatial Distributions of Ion-Species in a Large-Volume Inductively Coupled Plasma Source,”Surface and Coatings Technology, Vol. 136, pp. 102–105.
Rohlfing, E. A., Cox, D. M. and Kaldor, A., 1984, J. Chem. Phys. 81, 3322.
Zhao, F. Q., Kadota, T. and Takemoto, T., 1992, “Mixture Strength Measurements in the Combustion Chamber of SI Engine via Raleigh Scattering (Concentration Fluctuation in a Motored Engine,”JSME international journal. Series II, Fluids 35, 616.
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Kim, JU., Kim, Y.J. & Hong, B. Planar laser-induced fluorescence (PLIF) measurements of a pulsed electrothermal plasma jet. KSME International Journal 15, 1808–1815 (2001). https://doi.org/10.1007/BF03185138
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DOI: https://doi.org/10.1007/BF03185138