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Study of distributed suction of the boundary layer influencing the flow past a 3D roughness element on a straight wing model

Study of distributed suction of the boundary layer influencing the flow past a 3D roughness... A model of straight wing was used for study of the effect of distributed flow suction on the flow structure and on disturbance growth in the boundary layer past a single 3D roughness element installed on the wing surface (at Reynolds number Rec = 240 000). This kind of suction reduces the intensity of natural velocity pulsations by factor of 5. The acoustic-enhanced disturbance intensity drops by 90 times. The effect of distributed suction on the middle flow occurs due to eliminating the flow separation at the trail end of the wing. At the zone downstream the suction site, the boundary layer becomes laminar and uniform (two-dimensional) for the entire span of the wing. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Thermophysics and Aeromechanics Springer Journals

Study of distributed suction of the boundary layer influencing the flow past a 3D roughness element on a straight wing model

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Publisher
Springer Journals
Copyright
Copyright © M.M. Katasonov, V.S. Kaprilevskaya, V.V. Kozlov, and A.M. Pavlenko 2021
ISSN
0869-8643
eISSN
1531-8699
DOI
10.1134/s0869864321040016
Publisher site
See Article on Publisher Site

Abstract

A model of straight wing was used for study of the effect of distributed flow suction on the flow structure and on disturbance growth in the boundary layer past a single 3D roughness element installed on the wing surface (at Reynolds number Rec = 240 000). This kind of suction reduces the intensity of natural velocity pulsations by factor of 5. The acoustic-enhanced disturbance intensity drops by 90 times. The effect of distributed suction on the middle flow occurs due to eliminating the flow separation at the trail end of the wing. At the zone downstream the suction site, the boundary layer becomes laminar and uniform (two-dimensional) for the entire span of the wing.

Journal

Thermophysics and AeromechanicsSpringer Journals

Published: Jul 1, 2021

Keywords: straight wing; flow separation; laminar-turbulent transition; suction for boundary layer; 3D roughness element on a surface

References