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TsAGI Science Journal

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

TsAGI Science Journal

DOI: 10.1615/TsAGISciJ.v40.i2.60
pages 217-239

EXPERIMENTAL INVESTIGATION OF AERODYNAMIC LOADS IN THE TIP SECTIONS OF A RIGID BLADE OF AN INCLINED MODEL ROTOR

Valentina Michailovna Scheglova
Central Aerohydrodynamic Institute (TsAGI) 1, Zhukovsky str., Zhukovsky, 140180, Moscow region, Russia

ABSTRACT

This work investigates the character and the degree of influence of a slip in the tip sections of the blade on the basis of multiple pressure measuring points. The number of drain holes in each section increases along with the increase of the number of sections where the loads are measured. Measurement of the dynamic pressure in the tip part of the blade is accomplished. The results of the pressure measurements in the tip sections at relative radii varying from 0.8 to 0.99 are given. Special attention is paid to the pressure distribution in the area immediately adjacent to the blade tip and directly at the blade tip. The flow maps of the blade tips are considered in order to accumulate experimental information. The results are presented in terms of the figures of pressure change along the radius and the chord, and information about the loads acting on the blade tip of a given configuration is given. This information can be used for design and for the calculations of loads on the blades.

REFERENCES

  1. Zanozina, R. M., To the calculation of flexible deformations of main rotor blade at computer center.

  2. Dyachenko, A. S. and Baskin, V. E., Experimental definition of aerodynamic loads on the blade of a two-bladed model rotor at different velocities.

  3. Moller, E., Druck vemeilungsmessungen an ainem Hoch und Tiefdecker bei symmetrischer und unsymmetrischer Anstromung.

  4. Ganabov, V. I., Experimental investigation of drained propeller at high subsonic flow velocities.

  5. Gother, Â., Hochgeschwindigkeitsmessungen an Profilen der Reihe NACA 230 mit verschiedenen Dickenverhaltnissen.

  6. Ushakov, B. A., Krasilschikov, P. P., Volkov, A. L., and Grgegorgevskiy, A. N., Materials about the pressure distributions on the airfoils and their application while selecting the wing airfoil of a speed aircraft.


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