Flow tagging velocimetry in a superorbital expansion tube |
| |
| Authors: | B.N. Littleton A.I. Bishop T.J. McIntyre P.F. Barker H. Rubinsztein-Dunlop |
| |
| Affiliation: | (1) Centre for Laser Science, Department of Physics, University of Queensland, Brisbane 4072, Australia , AU |
| |
| Abstract: | Abstract. A non-intrusive laser-based method for direct velocity measurements has been demonstrated in a superorbital flow facility. The method is based upon laser enhanced ionisation velocimetry in which a tagged region is created by two step excitation of sodium and subsequent collisional ionisation. The achieved depletion of neutral atoms is then interrogated by planar laser induced fluorescence. The velocities were measured in the freestream at a superorbital condition yielding km/s. These results compare favourably with the measured shock speeds in the facility. Received 15 March 1999 / Accepted 2 March 2000 |
| |
| Keywords: | :Velocimetry Expansion tube Flow tagging Laser enhanced ionisation Sodium |
| 本文献已被 SpringerLink 等数据库收录！ |
