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Numerical Investigation of the Detaching Vortical Flow at Rotating Cylinders with Thom Discs

Ritz, Robert and Schomberg, Thomas and Wünsch, Olaf and Rütten, Markus and Kessler, Roland (2015) Numerical Investigation of the Detaching Vortical Flow at Rotating Cylinders with Thom Discs. AIAA-Aviation - 22nd AIAA Computational Fluid Dynamics Conference, 22. - 26. June 2015, Dallas, TX, USA. DOI: 10.2514/6.2015-2289 ISBN 978-1-62410-355-1

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Official URL: http://arc.aiaa.org/doi/abs/10.2514/6.2015-2289

Abstract

Due to the high cost pressure in the field of aviation, the further increase in effciency is in the focus of development. Nowadays, airfoils are highly developed and optimized. Thus, new sophisticated approaches, additional configurations and physical effects at lift generation devices have to be explored in order to further reduce drag and significantly increase lift. Focal point of these considerations is the Magnus effect, in which rotating cylinders generate a lift force. This has already been investigated in the past, in particular, different kinds of surface roughnesses, special rotor geometries, ratios of circumferential speed velocity to free stream velocity, or the effect of end plates have been considered. The Scottish engineer A. Thom achieved a significant increase of the performance by adding so called Thom discs coaxially and equidistantly mounted on the cylinder. Investigations of the Thom disc rotors (Thom rotors) have shown a maximum of the lift to drag ratio epsilon for the circumferential cylinder velocity to freestream velocity alpha = 2. Most of the conducted experimental studies have only delivered integral force values. However, detailed insights in the structure of the flow field are still missing.

Item URL in elib:https://elib.dlr.de/99601/
Document Type:Conference or Workshop Item (Speech)
Additional Information:AIAA-2015-2289
Title:Numerical Investigation of the Detaching Vortical Flow at Rotating Cylinders with Thom Discs
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Ritz, RobertUniversity of Kassel, Dept. of Mechanical Engineering, Institute of Fluid Mechanics, 34125 Kassel, GermanyUNSPECIFIED
Schomberg, ThomasUniversity of Kassel, Dept. of Mechanical Engineering, Institute of Fluid Mechanics, 34125 Kassel, GermanyUNSPECIFIED
Wünsch, OlafUniversity of Kassel, Dept. of Mechanical Engineering, Institute of Fluid Mechanics, 34125 Kassel, GermanyUNSPECIFIED
Rütten, Markusmarkus.ruetten (at) dlr.deUNSPECIFIED
Kessler, Rolandroland.kessler (at) dlr.deUNSPECIFIED
Date:2015
Refereed publication:Yes
Open Access:No
In DOAJ:No
In SCOPUS:No
In ISI Web of Science:No
DOI :10.2514/6.2015-2289
Page Range:pp. 1-13
Series Name:Conference Proceedings online
ISBN:978-1-62410-355-1
Status:Published
Keywords:Detaching Vortical Flow, Rotating Cylinders, Thom Discs
Event Title:AIAA-Aviation - 22nd AIAA Computational Fluid Dynamics Conference
Event Location:Dallas, TX, USA
Event Type:international Conference
Event Dates:22. - 26. June 2015
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Military Technologies
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > High Speed Configurations
Institute of Aerodynamics and Flow Technology > C²A²S²E - Center for Computer Applications in AeroSpace Science and Engineering
Deposited By: Micknaus, Ilka
Deposited On:23 Nov 2015 15:15
Last Modified:23 Nov 2015 15:15

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