| タイトル | Nonequilibrium vibrational population measurements in an expanding flow using spontaneous Raman scattering |
| 著者（英） | Ruffin, Stephen M.; Sharma, Surendra P.; Meyer, Scott A.; Gillespie, Walter D. |
| 著者所属（英） | NASA Ames Research Center |
| 発行日 | 1992-07-01 |
| 言語 | eng |
| 内容記述 | Vibrational relaxation of nitrogen in a 2D nozzle flow is studied using spontaneous Raman scattering. An electric arc driven shock tube operating as a reflected shock tunnel produces stagnation conditions of 5600 K and 100 atm. A 248 nm KrF laser pulse is focused into the nozzle to produce spatially resolved spontaneous Raman spectra. Vibrational population distributions are derived from the spectra for the states v = 0 to v = 8. The experimental results are compared with two theoretical models: the Landau-Teller relaxation model and a numerical solution of the master equations using transition rates derived from SSH theory. The Landau-Teller correction factor has been measured at 1.0 - 1.5. |
| NASA分類 | ATOMIC AND MOLECULAR PHYSICS |
| レポートNO | 92A47838
AIAA PAPER 92-2855 |
| 権利 | Copyright |
