TY - JOUR

T1 - Investigation of mean and fluctuation characteristics of the wake flow behind cylinders fitted with textile materials

AU - Mironov, D. S.

AU - Lebiga, V. A.

AU - Miau, J. J.

AU - Zinoviev, V. N.

AU - Pak, A. Yu

AU - Tsai, M. S.

AU - Lai, Y. H.

N1 - Funding Information: This work was supported by the Russian Foundation for Basic Research (Grant No. 18-58-52005 MHT_a). Publisher Copyright: © 2021, D.S. Mironov, V. A. Lebiga, J. J. Miau, V. N. Zinoviev, A.Yu. Pak, M.-S. Tsai, and Y.-H. Lai.

PY - 2021/9

Y1 - 2021/9

N2 - In the present paper, the results of a study of the influence of textile materials on the structure of the aerodynamic wake behind blunt-body models in the form of quasi-two-dimensional and cantilever cylinders are reported. The fabrics used were previously examined in the works by co-authors while determining the drag coefficient of a two-dimensional cylinder. The change in diameter in the latter case proved to be not more than 1%, and it was considered insignificant. The use of fabrics has made it possible to reduce the critical Reynolds number to about 2·105. The two- and three-dimensional flows turned out to be similar in terms of fluctuation level, whereas some narrowing of the wake behind the cantilever cylinder occurred due to the three-dimensional structure of the flow. Based on the results of spectral analysis, complete similarity between three- and two-dimensional flows was demonstrated, both for the flow around a smooth cylinder and for the flows around cylinders fitted with textile materials.

AB - In the present paper, the results of a study of the influence of textile materials on the structure of the aerodynamic wake behind blunt-body models in the form of quasi-two-dimensional and cantilever cylinders are reported. The fabrics used were previously examined in the works by co-authors while determining the drag coefficient of a two-dimensional cylinder. The change in diameter in the latter case proved to be not more than 1%, and it was considered insignificant. The use of fabrics has made it possible to reduce the critical Reynolds number to about 2·105. The two- and three-dimensional flows turned out to be similar in terms of fluctuation level, whereas some narrowing of the wake behind the cantilever cylinder occurred due to the three-dimensional structure of the flow. Based on the results of spectral analysis, complete similarity between three- and two-dimensional flows was demonstrated, both for the flow around a smooth cylinder and for the flows around cylinders fitted with textile materials.

KW - subsonic flow

KW - textile materials

KW - three-dimensional flow around a cylinder

KW - two-dimensional flow around a cylinder

KW - velocity fluctuations

UR - http://www.scopus.com/inward/record.url?scp=85123458261&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/27410528-af36-3da1-9e9a-c7b92e0ded26/

U2 - 10.1134/S0869864321050012

DO - 10.1134/S0869864321050012

M3 - Article

AN - SCOPUS:85123458261

VL - 28

SP - 609

EP - 617

JO - Thermophysics and Aeromechanics

JF - Thermophysics and Aeromechanics

SN - 0869-8643

IS - 5

M1 - 1

ER -