B.M. Efimtsov

On the base of the experimental material received using a plate with a step in the windtunnel, the space correlation of spectral components of wall pressure pulsations produced by the two-dimensional supersonic separation of turbulent and transient types is studied. The principal dimensionless parameter {similarity criteia) influence on a degree of the space pressure pulsation correlation over the whole interaction region is evaluated. A number of characteristic peculiarities of the space field structure of the turbulent pressure pulsation separation along the coordinate in the flow direction and orthogonally to the flow is revealed. In particular, it is established that along the coordinate orthogonal to the flow direction the pressure pulsation field can be treated to be uniform, without any elements of organization, and along the coordinate in the flow direction this field can be interpreted as an essentially non-uniform one with elements of the turbulent separation self-organization. The organization of a much greater degree is revealed at the separation of a transient type. It is manifested in a pronounced, completely correlated over the whole region of the interaction, narrowband maximuma of high intensity in pressure pulsa.tion spectra at the characteristic frequency and its harmonics.

DGLR/AIAA 14th Aeroacoustics Conference, 1992

Conference Paper

englisch

21,0 x 29,7 cm, 6 Seiten

DGLR-Bericht, 1992, 1992-03, DGLR/AIAA 14th Aeroacoustics Conference - Proceedings; S.72-77; 1992; Deutsche Gesellschaft für Luft- und Raumfahrt - Lilienthal-Oberth e.V., Bonn

NA

aeroacoustics

Bibliothek

1992