Formation of the three-dimensional structure of a high-speed jet exhausting from a model dual-stream jet nozzle
V.I. Zapryagaev, N.P. Kiselev, S.G. Kundasev, A.A. Pivovarov
Khristianovich Institute of Theoretical and Applied Mechanics SB RAS, Novosibirsk, Russia
Keywords: двухконтурное сопло, высокоскоростная двухконтурная струя, азимутальная неоднородность давления, dual-stream jet nozzle, high-speed dual-stream jet, azimuthal pressure non-uniformity
Abstract
The present work is devoted to the experimental study of a high-speed jet exhausting from a model dual-stream jet nozzle which was performed using non-contact (shadow visualization) and probing (Pitot pressure tube) methods for measuring gas-dynamic parameters. Azimuthal non-uniformity of the pressure distribution, whose magnitude in the external duct is much higher than that in the internal one, is revealed. The cause for the formation of the 3D flow structure is related to the supporting pylons installed inside the nozzle contours and with the formation of a transonic flow mode in the external duct.
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