An Experimental Investigation of Forces on a Textured Cylinder at Subcritical Reynolds Numbers

Spanwise deviations from a perfect circular cross-section, affect the aerodynamics and hydrodynamics of cylindrical structures. In this study the ability of a novel wavy cylinder, the textured cylinder, to reduce applied drag and lift forces is investigated experimentally. Three different configurat...

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Autores principales:	H. Karampour, Z. Wu, M. S. Mason
Formato:	article
Lenguaje:	EN
Publicado:	Isfahan University of Technology 2021
Materias:	textured cylinder; aerodynamic forces; strouhal number; wavy cylinder. Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/5c3b435fe42d41a288acf3eea0548fef
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id	oai:doaj.org-article:5c3b435fe42d41a288acf3eea0548fef
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spelling	oai:doaj.org-article:5c3b435fe42d41a288acf3eea0548fef2021-11-13T07:03:04ZAn Experimental Investigation of Forces on a Textured Cylinder at Subcritical Reynolds Numbers1735-3572https://doaj.org/article/5c3b435fe42d41a288acf3eea0548fef2021-01-01T00:00:00Zhttp://jafmonline.net/JournalArchive/download?file_ID=57180&issue_ID=1015https://doaj.org/toc/1735-3572Spanwise deviations from a perfect circular cross-section, affect the aerodynamics and hydrodynamics of cylindrical structures. In this study the ability of a novel wavy cylinder, the textured cylinder, to reduce applied drag and lift forces is investigated experimentally. Three different configurations of the proposed textured geometry, as well as a bare cylinder and a cylinder with helical strakes are 3D printed and tested in an open circuit wind tunnel. Tests are conducted at Reynolds numbers from 3.5×104 to 8.0×104. Results show that the time-averaged drag and fluctuating lift forces on the textured cylinder can be 20% and 15% lower than those of a bare cylinder, respectively. Amongst the tested cylinders, the straked cylinder exhibited the lowest fluctuating lift forces. However, the lowest time-averaged drag forces were measured on the textured cylinder, Tex30, through the range of Reynolds numbers tested. The Strouhal number of the Tex30 was found to be between those of the bare and straked cylinders.H. KarampourZ. WuM. S. MasonIsfahan University of Technology articletextured cylinder; aerodynamic forces; strouhal number; wavy cylinder.Mechanical engineering and machineryTJ1-1570ENJournal of Applied Fluid Mechanics, Vol 14, Iss 6, Pp 1787-1793 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	textured cylinder; aerodynamic forces; strouhal number; wavy cylinder. Mechanical engineering and machinery TJ1-1570
spellingShingle	textured cylinder; aerodynamic forces; strouhal number; wavy cylinder. Mechanical engineering and machinery TJ1-1570 H. Karampour Z. Wu M. S. Mason An Experimental Investigation of Forces on a Textured Cylinder at Subcritical Reynolds Numbers
description	Spanwise deviations from a perfect circular cross-section, affect the aerodynamics and hydrodynamics of cylindrical structures. In this study the ability of a novel wavy cylinder, the textured cylinder, to reduce applied drag and lift forces is investigated experimentally. Three different configurations of the proposed textured geometry, as well as a bare cylinder and a cylinder with helical strakes are 3D printed and tested in an open circuit wind tunnel. Tests are conducted at Reynolds numbers from 3.5×104 to 8.0×104. Results show that the time-averaged drag and fluctuating lift forces on the textured cylinder can be 20% and 15% lower than those of a bare cylinder, respectively. Amongst the tested cylinders, the straked cylinder exhibited the lowest fluctuating lift forces. However, the lowest time-averaged drag forces were measured on the textured cylinder, Tex30, through the range of Reynolds numbers tested. The Strouhal number of the Tex30 was found to be between those of the bare and straked cylinders.
format	article
author	H. Karampour Z. Wu M. S. Mason
author_facet	H. Karampour Z. Wu M. S. Mason
author_sort	H. Karampour
title	An Experimental Investigation of Forces on a Textured Cylinder at Subcritical Reynolds Numbers
title_short	An Experimental Investigation of Forces on a Textured Cylinder at Subcritical Reynolds Numbers
title_full	An Experimental Investigation of Forces on a Textured Cylinder at Subcritical Reynolds Numbers
title_fullStr	An Experimental Investigation of Forces on a Textured Cylinder at Subcritical Reynolds Numbers
title_full_unstemmed	An Experimental Investigation of Forces on a Textured Cylinder at Subcritical Reynolds Numbers
title_sort	experimental investigation of forces on a textured cylinder at subcritical reynolds numbers
publisher	Isfahan University of Technology
publishDate	2021
url	https://doaj.org/article/5c3b435fe42d41a288acf3eea0548fef
work_keys_str_mv	AT hkarampour anexperimentalinvestigationofforcesonatexturedcylinderatsubcriticalreynoldsnumbers AT zwu anexperimentalinvestigationofforcesonatexturedcylinderatsubcriticalreynoldsnumbers AT msmason anexperimentalinvestigationofforcesonatexturedcylinderatsubcriticalreynoldsnumbers AT hkarampour experimentalinvestigationofforcesonatexturedcylinderatsubcriticalreynoldsnumbers AT zwu experimentalinvestigationofforcesonatexturedcylinderatsubcriticalreynoldsnumbers AT msmason experimentalinvestigationofforcesonatexturedcylinderatsubcriticalreynoldsnumbers
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An Experimental Investigation of Forces on a Textured Cylinder at Subcritical Reynolds Numbers

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