Publication Date:
2019-07-13
Description:
A single-shot UV molecular Rayleigh scattering technique to measure velocity in high speed flow is described. The beam from an injection-seeded, frequency quadrupled Nd:YAG laser (266 nm) is focused to a line in a free air jet with velocities up to Mach 1.3. Rayleigh scattered light is imaged through a planar mirror Fabry-Perot interferometer onto a Charged Coupled Device (CCD) array detector. Some laser light is also simultaneously imaged through the Fabry-Perot to provide a frequency reference. Two velocity measurements are obtained from each image. Multiple-pulse data are also given. The Rayleigh scattering velocity data show good agreement with velocities calculated from isentropic flow relations.
Keywords:
Instrumentation and Photography
Type:
NASA--TM 170323
,
NAS 1.15: 170323
,
E-10426
,
International Symposium on Applications of Laser techniques to Fluid Mechanics; Jul 08, 1996 - Jul 11, 1996; Lisbon; Portugal
Format:
application/pdf
