Turbulent Flow Interaction with Porous Surfaces

Syamir Alihan Showkat Ali, Matthew Szoke, Mahdi Azarpeyvand, Carlos R. Il\'{a}rio da Silva

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

2 Citations (Scopus)
6 Downloads (Pure)

Abstract

The interaction of a standard boundary layer with a rough porous surface has been investigated experimentally. Comprehensive boundary layer and surface pressure measurements have been carried out using a long flat plate equipped with several streamwise and spanwise surface pressure transducers. To reveal the effects of the interaction of a boundary layer with a porous surface, three types of porous materials with different porosity and permeability constants are examined. Results have shown that porous surface treatments can significantly alter the boundary layer flow properties and cause significant changes to the energy cascade of the velocity fluctuations within the boundary layer. It has also been shown that porous surfaces cause a reduction in the high-frequency energy content of the surface pressure fluctuations. Moreover, it has been found that the use of a porous surface can lead to a significant reduction in the spanwise coherence and the length-scales of the boundary layer flow structures. The emergence of a strong hydrodynamic field inside the highly permeable surfaces has also been explored. The results presented in this paper are of great importance for the better understanding of the flow-porous interaction mechanisms and essential in controlling the generation of flow-induced noise in many engineering applications.
Original languageEnglish
Title of host publication24th AIAA/CEAS Aeroacoustics Conference 2018
Subtitle of host publicationProceedings of a meeting held 25-29 June 2018, Atlanta, Georgia, USA. Held at the AIAA Aviation Forum 2018
PublisherAmerican Institute of Aeronautics and Astronautics Inc. (AIAA)
Pages14-25
Number of pages12
ISBN (Print)9781510868922
DOIs
Publication statusPublished - 23 Jun 2018

Fingerprint Dive into the research topics of 'Turbulent Flow Interaction with Porous Surfaces'. Together they form a unique fingerprint.

  • Cite this

    Showkat Ali, S. A., Szoke, M., Azarpeyvand, M., & Il\'{a}rio da Silva, C. R. (2018). Turbulent Flow Interaction with Porous Surfaces. In 24th AIAA/CEAS Aeroacoustics Conference 2018: Proceedings of a meeting held 25-29 June 2018, Atlanta, Georgia, USA. Held at the AIAA Aviation Forum 2018 (pp. 14-25). American Institute of Aeronautics and Astronautics Inc. (AIAA). https://doi.org/10.2514/6.2018-2801