中文版 | English
Title

Three dimensional internal and near-wall flow features of a structured porous coated cylinder

Author
Corresponding AuthorLiu, Yu
DOI
Publication Years
2022-06-14
Conference Name
28th AIAA/CEAS Aeroacoustics Conference
Source Title
Volume
AIAA Paper 2022-3038
Conference Date
14-17 June, 2022
Conference Place
Southampton, UK
Abstract

The application of a porous coating to a cylinder can significantly reduce the vortex shedding tone when placed in a uniform flow. The mechanism of how this porous media attenuates vortex shedding has been studied more in recent years yet it is still not fully understood. Typical porous materials within a certain range of porosity and airflow resistivity, such as metal foam and porous polyurethane, have been studied extensively; however, the fundamental flow mechanisms responsible for vortex shedding attenuation are very difficult to determine. For example, it is nearly impossible to visualize the internal flow field of porous media with a randomized open-cell internal structure. A Structured Porous Coated Cylinder (SPCC) was designed in recent years to alleviate this internal flow field problem, as the SPCC has clear line of sight along the span and radial direction. SPCC variations have been previously studied and shown to reduce the vortex shedding tone of a bare cylinder in a very similar manner as a randomized porous coated cylinder. In this paper, we present a Tomographic Particle Image Velocimetry study of an SPCC tested in a water tunnel, revealing the previously unseen internal and near-wall flow fields of an SPCC. The flow is visualized in the porous layers, revealing complex interaction between the freestream flow field and the porous structure. Using cross-correlation methods within the flow field, we reveal the entrainment of the flow within the porous layers. Furthermore, implementation of Proper Orthogonal Decomposition shows that vortex shedding occurs within the porous layers.

SUSTech Authorship
First ; Corresponding
Language
English
URL[Source Record]
Indexed By
EI Accession Number
20223112462660
EI Keywords
Correlation Methods ; Cylinders (Shapes) ; Metal Foams ; Metals ; Porosity ; Principal Component Analysis ; Velocity Measurement ; Vortex Flow ; Vortex Shedding ; Wall Flow
ESI Classification Code
Fluid Flow, General:631.1 ; Mathematical Statistics:922.2 ; Physical Properties Of Gases, Liquids And Solids:931.2 ; Special Purpose Instruments:943.3
Scopus EID
2-s2.0-85135027720
Data Source
Scopus
Publication Status
正式出版
Citation statistics
Cited Times [WOS]:0
Document TypeConference paper
Identifierhttp://kc.sustech.edu.cn/handle/2SGJ60CL/365074
DepartmentDepartment of Mechanics and Aerospace Engineering
Affiliation
1.Department of Mechanics and Aerospace Engineering, Southern University of Science and Technology, Shenzhen, 518055, China
2.Delft University of Technology, Delft, 2629HS, Netherlands
First Author AffilicationDepartment of Mechanics and Aerospace Engineering
Corresponding Author AffilicationDepartment of Mechanics and Aerospace Engineering
First Author's First AffilicationDepartment of Mechanics and Aerospace Engineering
Recommended Citation
GB/T 7714
Arcondoulis, Elias J.G.,Liu, Yu,Yang, Yannian,et al. Three dimensional internal and near-wall flow features of a structured porous coated cylinder[C],2022.
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