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TsAGI Science Journal

ISSN Print: 1948-2590
ISSN Online: 1948-2604

TsAGI Science Journal

DOI: 10.1615/TsAGISciJ.2013010498
pages 547-558

VIDEOGRAMMETRY METHOD OF NON-CONTACT MEASUREMENTS OF INSTANTANEOUS DEFORMATION OF ROTATING PROPELLERS BLADES

Sergei Ivanovich Inshakov
Central Aerohydrodynamic Institute (TsAGI), 1, Zhukovsky Str., Zhukovsky, Moscow Region, 140180, Russian Federation
Vladimir Petrovich Kulesh
Central Aerohydrodynamic Institute (TsAGI), 1 Zhukovsky Str., Zhukovsky, 140180, Russia
Vladimir Evguenyevich Mosharov
Central Aerohydrodynamic Institute (TsAGI), 1, Zhukovsky Str., Zhukovsky, Moscow Region, 140180, Russian Federation
Vladimir Nikolaevich Radchenko
Central Aerohydrodynamic Institute (TsAGI), 1, Zhukovsky str., Zhukovsky, 140180, Moscow region, Russia

ABSTRACT

A videogrammetry method and a system for non-contact measurements of the instantaneous deformation of bending and torsion of the blades of rotating propellers are developed. A procedure for auto-calibration of the measurement system is presented. This procedure is performed during each wind tunnel run at low speeds of the propeller rotation, which allows tracking the possible changes of the measurement system parameters during the tests. A procedure to eliminate the influence of blade slippage caused by delay in the synchronization pulse is developed. The method was used in the tests of a two-rotor coaxial ventilator propeller in the T-104 and T-107 wind tunnels at TsAGI. It is shown that the instantaneous bending deformation reached a value in the range from −0.5 to −4.5 mm at the tip of the front blade and a value in the range from 0 to 3 mm at the tip of the rear blade. The torsion deformations were in the ranges from 0 to 3.3° and 1.3 to 0°.


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