Features of the Flow Structure in the Boundary Layer on the Flying Wing Model
https://doi.org/10.25205/2541-9447-2022-17-4-72-86
Abstract
In a subsonic wind tunnel, the effect of slip and attack angles on the separation structure of the flow around the model of a trapezoidal flying wing was experimentally studied. In the course of this fundamental study, visualization patterns of a near-wall flow on the leeward side of the wing were obtained at the angles of attack of 0 and 18 degrees and oncoming flow velocity of 25 m/s. It was shown for the first time that gradual increase in slip angle of the wing leads to the restructuring of the flow, up to the disappearance of the local or global separation region on one of the consoles of the model. At the same time, on the second console, the separation is maintained. An increase in the angle of attack of the swept wing led to the development of a separation region: from a locally separated bubble to separation from the leading edge with a reverse flow and the formation of a pair of large-scale vortices. For the first time, singular points on the surface of the model for each mode have been found; by setting cone-shaped perturbation sources in these points one can achieve a significant improvement in the flow around the wing.
Keywords
local separation bubble,
global stall,
three-dimensional boundary layer,
trapezoidal flying wing, flow control,
slip angle,
angle of attack,
vortices
Supporting agencies: This work was carried out within the framework of the Program of Fundamental Scientific Research of State Academies of Science for 2021–2023 (project 121030500149-8). The work was carried out using the Equipment Sharing Center “Mechanics” of ITAM SB RAS.
About the Authors
A. M. Pavlenko
Khristianovich Institute of Theoretical and Applied Mechanics SB RAS
Russian Federation
Russian Federation
Alexander M. Pavlenko, Ph.D., senior researcher
WoS Researcher ID F32632018; Scopus Author ID 26027565200
Novosibirsk
B. Yu. Zanin
Khristianovich Institute of Theoretical and Applied Mechanics SB RAS
Russian Federation
Russian Federation
Zanin Boris Yurievich, Doctor of Technical Sciences, Leading Researcher
Novosibirsk
N. S. Alpatskiy
Khristianovich Institute of Theoretical and Applied Mechanics SB RAS
Russian Federation
Russian Federation
Alpatskiy Nikita Sergeevich, 2nd year Master’s Student of the Faculty of Aircraft NSTU, laboratory assistant
Novosibirsk
E. A. Melnik
Khristianovich Institute of Theoretical and Applied Mechanics SB RAS
Russian Federation
Russian Federation
Melnik Elizaveta Andreevna, 2nd year Master’s Student of the Faculty of Aircraft NSTU, laboratory assistant
Novosibirsk
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Review
For citations:
Pavlenko A.M., Zanin B.Yu., Alpatskiy N.S., Melnik E.A. Features of the Flow Structure in the Boundary Layer on the Flying Wing Model. SIBERIAN JOURNAL OF PHYSICS. 2022;17(4):72-86. (In Russ.) https://doi.org/10.25205/2541-9447-2022-17-4-72-86
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