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Loading on rounded square foundation elements of offshore structures with marine growth at incidence

Frede, Annika and Van Hinsberg, Nils Paul (2020) Loading on rounded square foundation elements of offshore structures with marine growth at incidence. AFMC2020 - Australasian Fluid Mechanics Conference, 07.-10. Dez. 2020, Brisbane, Australien. doi: 10.14264/6abf09d.

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Official URL: http://dx.doi.org/10.14264/6abf09d

Abstract

A systematic wind tunnel study is performed to identify the mean and fluctuating loads experienced by a 2D square prism with non-dimensional rounded edges of r=D = 0:16 and covered with hard marine fouling for Reynolds numbers between 70,000 and 8 million. The incidence angle is varied from a=-45 to 3.25 deg. with increments of 3.25 and 6.5 deg. . The critical angle of incidence, at which a reattachment of the free shear layer takes place on the lateral windward directed side surface, is found at acr =-6.5 deg. . For a acr. For the latter angles of incidence, a decrease towards -45 deg. induces higher values of CD and the r.m.s. of the lift fluctuations, as well as lower Strouhal numbers and mean lift forces.

Item URL in elib:https://elib.dlr.de/139621/
Document Type:Conference or Workshop Item (Speech)
Title:Loading on rounded square foundation elements of offshore structures with marine growth at incidence
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Frede, AnnikaAnnika.Frede (at) dlr.deUNSPECIFIED
Van Hinsberg, Nils Paulnils.vanhinsberg (at) dlr.deUNSPECIFIED
Date:December 2020
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
DOI :10.14264/6abf09d
Editors:
EditorsEmailEditor's ORCID iD
Chanson, HubertUNSPECIFIEDUNSPECIFIED
Brown, RichardUNSPECIFIEDUNSPECIFIED
Status:Published
Keywords:incidence, Reynolds number, prism, loading, separation
Event Title:AFMC2020 - Australasian Fluid Mechanics Conference
Event Location:Brisbane, Australien
Event Type:international Conference
Event Dates:07.-10. Dez. 2020
Organizer:QUT / UQ
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 - Flight Physics (old)
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity > Aeroelastic Experiments
Deposited By: Frede, Annika
Deposited On:21 Dec 2020 09:30
Last Modified:21 Dec 2020 09:30

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