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Rayleigh scattering diagnostic for dynamic measurement of velocity fluctuations in high speed jets
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Seasholtz, Richard G. Elam, Kristie A. Panda, Jayanta |
| Copyright Year | 2001 |
| Description | A flow diagnostic technique based on the molecular Rayleigh scattering of laser light is used to obtain dynamic density and velocity data in a high speed flow. The technique is based on analyzing the Rayleigh scattered light with a Fabry-Perot interferometer used in the static, imaging mode. An analysis is presented that established a lower bound for measurement uncertainty of about 20 m/sec for individual velocity measurements obtained in a 100 microsecond time interval. Software and hardware interfaces were developed to allow computer control of all aspects of the experiment and data acquisition. The signals from three photomultiplier tubes were simultaneously recorded using photon counting at a 10 kHz sampling rate and 10 second recording periods. Density and velocity data, including distribution functions and power spectra, taken in a Mach 0.8 free jet, are presented. |
| File Size | 884614 |
| Page Count | 16 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20010049425 |
| Archival Resource Key | ark:/13960/t0rr6sp7b |
| Language | English |
| Publisher Date | 2001-04-01 |
| Access Restriction | Open |
| Subject Keyword | Rayleigh Scattering Power Spectra Flow Measurement Numerical Control Velocity Measurement Fabry-perot Interferometers Computer Programs Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
