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Velocity visualization in gaseous flows (Document No: 19850023132)
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Hanson, R. K. |
| Copyright Year | 1985 |
| Description | Techniques are established for visualizing velocity in gaseous flows. Two approaches are considered, both of which are capable of yielding velocity simultaneously at a large number of flowfield locations, thereby providing images of velocity. The first technique employs a laser to mark specific fluid elements and a camera to track their subsequent motion. Marking is done by laser-induced phosphorescence of biacetyl, added as a tracer species in a flow of N2, or by laser-induced formation of sulfur particulates in SF6-H2-N2 mixtures. The second technique is based on the Doppler effect, and uses an intensified photodiode array camera and a planar form of laser-induced fluorescence to detect 2-d velocities of I2 (in I2-N2 mixtures) via Doppler-shifted absorption of narrow-linewidth laser radiation at 514.5 nm. |
| File Size | 1113731 |
| Page Count | 18 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19850023132 |
| Archival Resource Key | ark:/13960/t27992452 |
| Language | English |
| Publisher Date | 1985-07-01 |
| Access Restriction | Open |
| Subject Keyword | Fluid Mechanics And Heat Transfer Laser Doppler Velocimeters Gas Dynamics Flow Measurement Laser Induced Fluorescence Particulates Fluorescence Doppler Effect Photodiodes Frequency Shift Gas Flow Flow Visualization Cameras Flow Velocity Absorption Spectra Velocity Measurement Laser Applications Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
