It is well known that arc plasma is one of the main tools for the ground simulation of the reentry environment, so its experimental diagnoisis is very important. We have etsablished a set of arc plasma supersonic nozzle flow device with high stability and running continuously. The stability of spectral intesnti for supersonic arc-jet is 1-1.5%. On the basis of the device we have made a spectroscopic diagnostic investigation on the supersonic nozzle flow of non-equilibrium arc plasma for argon arc-jet and obtained the rich experimental diagnostic results about supersonic arc-jet. The experiments results show that the electron temperature of supersonic arc-jet changes non-monotonically, and it decrease in a range and increases in the next range periodically along with the flow direction. The established device and diagnostic method on supersonic flow of arc plasma has a very wide application in the research on non-equilibrium flow mechanisms of high temperature gases.

Date Published: 29 April 2003
PDF: 6 pages
Proc. SPIE 5058, Optical Technology and Image Processing for Fluids and Solids Diagnostics 2002, (29 April 2003); doi: 10.1117/12.509851

Published in SPIE Proceedings Vol. 5058:
Optical Technology and Image Processing for Fluids and Solids Diagnostics 2002
Gong Xin Shen; Soyoung S. Cha; Fu-Pen Chiang; Carolyn R. Mercer, Editor(s)