Abstract
A visual study of underexpanded plasma jet was conducted to reveal the detailed behavior in the strong magnetic field. The images of the jet were taken by a digital single-lens reflex camera through viewing windows. The distribution of optical intensity obtained from the raw data was compared to that of the typical emission line intensity. The profile of the optical intensity agrees well with that of the emission intensity. It is illustrated that the typical structure of underexpanded jet such as Mach disk is also affected obviously by the magnetic field. The radial distribution of number density was determined by using the image analysis based on the Abel-inversion. The converted data clarify the jet behavior that is hidden on the ordinary observation. The density obtained from numerical analysis for a simple gas was also compared with the number density. It is confirmed from the comparison with numerical results that the radial profile of number density can be utilized for understanding the plasma jet behavior under the strong magnetic field.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Chakravarthy, S. and Osher, S., A New Class of High Accuracy TVD Schemes for Hyperbolic Conservation Laws, AIAA Paper, No. 85-0363 (1985).
Cumber, P. S., Fairweather, M., Falle, S. A. E. G. and Giddings, J. R., Predictions of the Structure of Turbulent, Highly Underexpanded Jets, Transactions of the ASME, Journal of Fluids Engineering, 117 (1995), 599–604.
Koike, K., Ono, N., Watanabe, Y. and Musha, K., Measurement on the Excitation Temperature of Argon Plasma Jet under Strong Magnetic Field, Vacuum, 73 (2004), 353–358
Nishiyama, H., Sato, T., Veefkind, A. and Kamiyama, S., Functional Enhancement of a Nonequilibrium Plasma Jet by Seeding in the Applied Magnetic Field, Heat and Mass Transfer, 30 (1995), 291–296.
Ono, N., Musha, K. and Koike, K., Control of Plasma Jet Using Strong Magnetic Field, JSME International Journal, Series B, 48-3 (2005), 411-416.
Ono, N., Musha, K. and Koike, K., Visualization of Plasma Jet under Strong Magnetic Field, 11th International Symposium on Flow Visualization, University of Notre Dame (Notre Dame, Indiana, USA), (2004), 9 pages, CD-ROM.
Sun, L. Q., Sugiyama, H., Mizobata, K. and Fukuda, K., Numerical and Experimental Investigations on the Mach 2 Pseudo-Shock Wave in a Square Duct, Journal of Visualization, 6-4 (2003), 363–370.
Viren, M., Jagadeesh, G., Reddy, K. P. J., Sun, M. and Takayama, K., Visualization of Shock Waves around Hypersonic Spiked Blunt Cones Using Electric Discharge, Journal of Visualization, 8-1 (2005), 65–72.
Yano, R., Contini, V., Plönjes, E., Palm, P., Merriman, S., Aithal, S., Adamovich, I., Lempert, W., Subramaniam, V. and Rich, J. W., Supersonic Nonequilibrium Plasma Wind-Tunnel Measurements of Shock Modification and Flow Visualization, AIAA JOURNAL, 38-10 (2000), 1879–1888.
Author information
Authors and Affiliations
Additional information
Norifumi Ono: He received his M. Sc. (Eng.) degree in Mechanical Engineering in 1991 from Tohoku Gakuin University and his Ph.D. in Mechanical Engineering in 1995 from the same university. He worked in Department of Chemical Energy Engineering, Yokosuka Research Laboratory, Central Research Institute of Electric Power Industry as a visiting researcher in 1995. He then became a Part-time Lecturer of Tohoku Gakuin University in 1997, and currently is an associate professor. His research interests are analysis of plasma jet characteristics, computational fluid simulation and control of flow behavior.
Yasuhumi Otomo: He received his B. Sc. (Eng.) degree in mechanical engineering from Tohoku Gakuin University in 2005. He is currently a graduate student in the Course of Mechanical Engineering, Division of Engineering, Graduate School of Tohoku Gakuin University. His current research interests are focused on improvement of optical techniques for plasma emission measurements and quantitative evaluation on effects of strong magnetic field on plasma jet.
Kazuo Koike: He received his M. Sc. (Eng.) in Mechanical Engineering II in 1973 from Tohoku University. He also received his Ph.D. in Mechanical Engineering II in 1976 from Tohoku University. After completion his Ph.D. program, he has been a faculty member of Institute of High Speed Mechanics, Tohoku University (1976–1988). He then became an associate professor of Tohoku Gakuin University in 1988, and currently is a Professor. His research interests are flow phenomena of functional fluid in strong magnetic field, control of plasma jet using strong magnetic field, and utilization of optical emission spectroscopy and image analysis for plasma diagnostics.
Rights and permissions
About this article
Cite this article
Ono, N., Otomo, Y. & Koike, K. Behavior of underexpanded plasma jet in strong magnetic field. J Vis 10, 237–244 (2007). https://doi.org/10.1007/BF03181835
Received:
Revised:
Issue Date:
DOI: https://doi.org/10.1007/BF03181835