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Optical measurement of unducted fan blade deflections
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Kurkov, Anatole P. |
| Copyright Year | 1988 |
| Description | A nonintrusive optical method for measuring unducted fan (or propeller) blade deflections is described and evaluated. The measurement does not depend on blade surface reflectivity. Deflection of a point at the leading edge and a point at the trailing edge in a plane nearly perpendicular to the pitch axis is obtained with a single light beam generated by a low-power, helium-neon laser. Quantitiative analyses are performed from taped signals on a digital computer. Averaging techniques are employed to reduce random errors. Measured static deflections from a series of high-speed wind tunnel tests of a counterrotating unducted fan model are compared with available, predicted deflections, which are also used to evaluate systematic errors. |
| File Size | 2769244 |
| Page Count | 15 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19880019758 |
| Archival Resource Key | ark:/13960/t0cv9d91q |
| Language | English |
| Publisher Date | 1988-01-01 |
| Access Restriction | Open |
| Subject Keyword | Digital Computers Propellers Deflection Ducts Random Errors Fan Blades Pitch Inclination Optical Measurement Prop-fan Technology Helium-neon Lasers Trailing Edges Beams Radiation Leading Edges Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
