Optical Measurement of Unducted Fan Blade DeflectionsSource: Journal of Turbomachinery:;1990:;volume( 112 ):;issue: 004::page 751Author:A. P. Kurkov
DOI: 10.1115/1.2927718Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: 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. Quantitative 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 also are used to evaluate systematic errors.
keyword(s): Optical measurement , Blades , Deflection , Errors , Propellers , Signals , Wind tunnels , Helium-neon lasers , Reflectance AND Computers ,
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| contributor author | A. P. Kurkov | |
| date accessioned | 2017-05-08T23:34:01Z | |
| date available | 2017-05-08T23:34:01Z | |
| date copyright | October, 1990 | |
| date issued | 1990 | |
| identifier issn | 0889-504X | |
| identifier other | JOTUEI-28606#751_1.pdf | |
| identifier uri | http://yetl.yabesh.ir/yetl/handle/yetl/107702 | |
| description abstract | 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. Quantitative 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 also are used to evaluate systematic errors. | |
| publisher | The American Society of Mechanical Engineers (ASME) | |
| title | Optical Measurement of Unducted Fan Blade Deflections | |
| type | Journal Paper | |
| journal volume | 112 | |
| journal issue | 4 | |
| journal title | Journal of Turbomachinery | |
| identifier doi | 10.1115/1.2927718 | |
| journal fristpage | 751 | |
| journal lastpage | 758 | |
| identifier eissn | 1528-8900 | |
| keywords | Optical measurement | |
| keywords | Blades | |
| keywords | Deflection | |
| keywords | Errors | |
| keywords | Propellers | |
| keywords | Signals | |
| keywords | Wind tunnels | |
| keywords | Helium-neon lasers | |
| keywords | Reflectance AND Computers | |
| tree | Journal of Turbomachinery:;1990:;volume( 112 ):;issue: 004 | |
| contenttype | Fulltext |