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Numerical study on the aeroelasticstability of circular cylinders

Abohelwa, Mohamed Saad Elsayed (2020) Numerical study on the aeroelasticstability of circular cylinders. Master's, Technische Universität Braunschweig.

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Abstract

In this master thesis, the aeroelastic stability of circular cylinders is investigated. The study is based on 2D CFD simulations carried out with DLR TAU-Code. Circular cylinders immersed into a steady flow are exposed to fluid forces and aerodynamic instabilities such as vortex-induced vibrations (VIV) and galloping that cause the cylinder to oscillate. The aerodynamic instabilities are induced primarily because of flow separation around the body and the formation of the Von Karman vortex street. This thesis aims to study the efficacy of using spoilers or splitter plates with different lengths and positioned in different positions around the cylinder on suppressing the vortex formation and attenuating the cylinder's oscillation.

Item URL in elib:https://elib.dlr.de/140335/
Document Type:Thesis (Master's)
Title:Numerical study on the aeroelasticstability of circular cylinders
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Abohelwa, Mohamed Saad ElsayedTU BraunschweigUNSPECIFIED
Date:16 December 2020
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:flutter, limit cycle oscillations, bluff body, spoiler, cylinder, vortex street, galloping, vortex-induced vibrations
Institution:Technische Universität Braunschweig
HGF - Research field:Energy
HGF - Program:Renewable Energies
HGF - Program Themes:Wind Energy
DLR - Research area:Energy
DLR - Program:E SW - Solar and Wind Energy
DLR - Research theme (Project):E - Wind Energy (old)
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity > Aeroelastic Simulation
Deposited By: Nitzsche, Jens
Deposited On:12 Jan 2021 17:12
Last Modified:12 Jan 2021 17:12

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