Acoustic resonance phenomena in air bleed channels in aviation engines


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Abstract

The existence of axial–radial acoustic resonance oscillations of the basic air flow in bleed channels of aviation engines is demonstrated theoretically and experimentally. Numerical and analytical methods are used to determine the frequency of acoustic resonance oscillations for the lowest modes of open and closed bleed channels of the PS-90A engine. Experimental investigations reveal new acoustic resonance phenomena arising in the air flow in bleed channel cavities in the core duct of this engine owing to instability of the basic air flow. The results of numerical, analytical, and experimental studies of the resonance frequencies reached in the flow in bleed channel cavities in the core duct of the PS-90A engine are found to be in reasonable agreement. As a result, various types of resonance oscillations in bleed channels can be accurately described.

About the authors

A. A. Aleksentsev

Perm National Research Polytechnic University

Author for correspondence.
Email: aleksentsev@avid.ru
Russian Federation, Perm, 614990

A. N. Sazhenkov

Open Joint Stock Company “Aviadvigatel” (“UEC Perm Engines”)

Email: aleksentsev@avid.ru
Russian Federation, Perm, 614990

S. V. Sukhinin

Lavrentyev Institute of Hydrodynamics, Siberian Branch

Email: aleksentsev@avid.ru
Russian Federation, Novosibirsk, 630090

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