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Doppler global velocimetry: development of a flight research instrumentation system for application to non-intrusive measurements of the flow field
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Brosnan, Stephen J. Komine, Hiroshi Long, William H. Stappaerts, Eddy A. |
| Copyright Year | 1994 |
| Description | Doppler Global Velocimetry (DGV) is a new diagnostic tool that offers potential for flow field measurements in flight by acquiring three-component velocity data in near real-time during flight maneuvers. The feasibility of implementation of a flight DGV system aboard NASA's High-Angle-of-Attack Research Vehicle (HARV) was addressed in this work by identifying the essential characteristics of a flight measurement system and by performing calibration and error tests. Results from this work were: an outline that establishes a preliminary basis for system configurations by analyzing measurement errors, installation issues, and operating requirements; measurement of the accuracy of the DGV technique using a laboratory breadboard DGV system based on a frequency-doubled Nd: YAG laser and iodine Absorption Line Filter (ALF), which showed excellent agreement between the DGV data and pilot measurements on a laminar flow jet with velocities of up to 150 m/sec; a survey of DGV system components and technologies that are relevant to the design of a flight measurement system, including a survey of cameras for the next generation DGV receivers; an assessment of the candidate lasers and absorption line filters for the flight system, resulting in a near-term recommendation of Nd: host lasers and an iodine ALF for both flight and wind tunnel applications. |
| File Size | 3362955 |
| Page Count | 55 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19940019887 |
| Archival Resource Key | ark:/13960/t9b61h565 |
| Language | English |
| Publisher Date | 1994-01-26 |
| Access Restriction | Open |
| Subject Keyword | Absorption Spectroscopy Flight Tests Laser Doppler Velocimeters Wind Tunnels Calibrating Yag Lasers Wind Tunnel Apparatus Real Time Operation Potential Flow Laminar Flow Flow Distribution Laser Spectroscopy Nonintrusive Measurement Cameras Line Spectra 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 | Technical Report |
