| タイトル | 2D velocity and temperature measurements in high speed flows based on spectrally resolved Rayleigh scattering |
| 本文（外部サイト） | http://hdl.handle.net/2060/19930010462 |
| 著者（英） | Seasholtz, Richard G. |
| 著者所属（英） | NASA Lewis Research Center |
| 発行日 | 1992-01-01 |
| 言語 | eng |
| 内容記述 | The use of molecular Rayleigh scattering for measurements of gas velocity and temperature is evaluated. Molecular scattering avoids problems associated with the seeding required by conventional laser anemometry and particle image velocimetry. The technique considered herein is based on the measurement of the spectrum of the scattered light. Planar imaging of Rayleigh scattering using a laser light sheet is evaluated for conditions at 30 km altitude (typical hypersonic flow conditions). The Cramer-Rao lower bounds for velocity and temperature measurement uncertainties are calculated for an ideal optical spectrum analyzer and for a planar mirror Fabry-Perot interferometer used in a static, imaging mode. With this technique, a single image of the Rayleigh scattered light from clean flows can be analyzed to obtain temperature and one component of velocity. Experimental results are presented for planar velocity measurements in a Mach 1.3 air jet. |
| NASA分類 | INSTRUMENTATION AND PHOTOGRAPHY |
| レポートNO | 93N19651
NASA-TM-105784
E-7214
NAS 1.15:105784 |
| 権利 | No Copyright |
