期刊
FRONTIERS IN PHYSICS
卷 10, 期 -, 页码 -出版社
FRONTIERS MEDIA SA
DOI: 10.3389/fphy.2022.881966
关键词
array of flexible plates; laminar boundary layer; flow-induced vibration; waving motion; Kelvin-Helmholtz instability; frequency lock-in; fluid-structure interaction; immersed boundary method
资金
- China Postdoctoral Science Foundation [2021M690466]
- National Natural Science Foundation of China [11372331, 11772338, 12172361]
This paper numerically studies the interactions between large arrays of wall-mounted flexible plates and oncoming laminar boundary-layer flows using the immersed boundary method. The influences of bending rigidity, mass ratio, and gap distance between adjacent plates on the dynamic behaviors are explored. Five distinct dynamic modes are identified, and the frequency lock-in phenomenon and various types of flow instability associated with different dynamic modes are discussed.
The interactions between large arrays of wall-mounted flexible plates and oncoming laminar boundary-layer flows are studied numerically by using the immersed boundary method. The influences of bending rigidity, mass ratio and gap distance between adjacent plates on the dynamic behaviors are explored. With the variation of control parameters, five distinct dynamic modes, namely, static reconfiguration, sectional waving, regular waving, upright oscillation and cavity oscillation, are identified. The frequency lock-in phenomenon and various types of flow instability associated with different dynamic modes are discussed. The findings of this study indicate that the coherent motions of the arrays are governed by a coupled mechanism in which the frequency of flow instability is locked onto the structural natural frequency.
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