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Resonant doppler velocimeter. ph.d. thesis. final report, 1 jul. 1974 - 31 oct. 1979; [velocity, temperature, and pressure measurement]
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Zimmermann, M. |
| Copyright Year | 1980 |
| Description | A technique is presented for visualizing and quantitatively measuring velocity, temperature, and pressure by shining a single frequency laser beam into a gaseous flow which is seeded with an atomic species. The laser is tuned through the absorption frequencies of the seeded species and the absorption profile is detected by observing fluorescence as the atoms relax back to the ground state. The flow velocity is determined by observing the Doppler shift in the absorption frequency. Spectroscopic absorption line broadening mechanisms furnish information regarding the static temperature and pressure of the moving gas. Results of experiments conducted in the free stream and in the bow shock of a conical model mounted in a hypersonic wind tunnel indicate that the experimental uncertainties in the measurement of average values for the velocity, temperature and pressure of the flow are 0.1, 5 and 10 percent respectively. |
| File Size | 11340227 |
| Page Count | 246 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19800010071 |
| Archival Resource Key | ark:/13960/t03z32p85 |
| Language | English |
| Publisher Date | 1980-03-01 |
| Access Restriction | Open |
| Subject Keyword | Fluid Mechanics And Heat Transfer Temperature Measurement Laser Doppler Velocimeters Gas Flow Flow Measurement Wind Tunnel Tests Fluorescence Flow Visualization Absorption Spectra Pressure Measurement Line Spectra Doppler Effect Velocity Measurement Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Thesis |
