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The effect of 2-D surface irregularities on laminar-turbulent transition: A comparison of numerical methodologies

Tocci, Francesco and Franco, Juan and Hein, Stefan and Chauvat, Guillaume and Hanifi, Ardeshir (2020) The effect of 2-D surface irregularities on laminar-turbulent transition: A comparison of numerical methodologies. In: 22nd STAB/DGLR Symposium on New Results in Numerical and Experimental Fluid Mechanics XIII - Jahresbericht 2020, pp. 72-73. Springer Nature. 22. STAB/DGLR Symposium 2020, 15. Juli 2020, Göttingen, Deutschland.

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Official URL: https://www.dlr.de/as/de/Portaldata/5/Resources/dokumente/veranstaltungen/stab_workshop/STAB-Jahresbericht-2020.pdf

Abstract

Laminar-turbulent transition prediction is of practical interest in aircraft design since transition affects important aerodynamic quantities such as drag and heat transfer. Extended laminar flow on aerodynamic surfaces is an effective way of reducing aircraft drag. One of the major challenges for the implementation of laminar-flow surfaces is the potential for any irregularity to move transition upstream. Under low-disturbance environment, boundary-layer transition results from the growth and breakdown of different flow instabilities. In 2-D flows the scenario is dominated by Tollmien-Schlichting (TS) instabilities. Common wing-surface irregularities, such as two-dimensional steps, gaps or waviness can alter the growth characteristics of TS waves and therefore must be taken into account at the design stage.

Item URL in elib:https://elib.dlr.de/135594/
Document Type:Conference or Workshop Item (Other)
Additional Information:STAB-Jahresbericht 2020
Title:The effect of 2-D surface irregularities on laminar-turbulent transition: A comparison of numerical methodologies
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Tocci, FrancescoFrancesco.Tocci (at) dlr.deUNSPECIFIED
Franco, JuanJuan.Franco (at) dlr.deUNSPECIFIED
Hein, StefanStefan.Hein (at) dlr.deUNSPECIFIED
Chauvat, Guillaumechauvat (at) kth.seUNSPECIFIED
Hanifi, Ardeshirhanifi (at) kth.seUNSPECIFIED
Date:October 2020
Journal or Publication Title:22nd STAB/DGLR Symposium on New Results in Numerical and Experimental Fluid Mechanics XIII - Jahresbericht 2020
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 72-73
Publisher:Springer Nature
Series Name:Notes on Numerical Fluid Mechanics and Multidisciplinary Design
Status:Published
Keywords:laminar-turbulent transition, 2-D surface irregularities, LST, PSE, AHLNS, DNS
Event Title:22. STAB/DGLR Symposium 2020
Event Location:Göttingen, Deutschland
Event Type:national Conference
Event Dates:15. Juli 2020
Organizer:STAB/DGLR
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 - Simulation and Validation (old)
Location: Göttingen
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > High Speed Configurations, GO
Deposited By: Tocci, Francesco
Deposited On:18 Dec 2020 23:43
Last Modified:18 Dec 2020 23:43

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