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INFLUENCE OF SURFACE IMPERFECTIONS WITH SLIGHTLY ROUNDED CORNERS ON THE EXPECTED LAMINAR-TURBULENCE TRANSITION LOCATION

Franco Sumariva, Juan Alberto and Paul Panuthara, John and Heinritz, Yannik and Hein, Stefan (2023) INFLUENCE OF SURFACE IMPERFECTIONS WITH SLIGHTLY ROUNDED CORNERS ON THE EXPECTED LAMINAR-TURBULENCE TRANSITION LOCATION. In: ERCOFTAC Series. 15th ERCOFTAC SIG 33 Workshop, Progress in Flow Instability, Transition and Control, 2023-06-28 - 2023-06-30, Alghero, Sardinia, Italy. ISSN 1382-4309.

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Official URL: https://www.ercoftac-sig33.conf.kth.se/

Abstract

The presence of surface imperfections on aerodynamics devices, such as steps or gaps of height/depth h comparable with the local boundary-layer displacement thickness δ∗, might alter the spatial development of linear mechanisms that trigger the laminar-turbulent transition process, such as Tollmien-Schlichting (TS) waves or Crossflow Instabilities (CFI). Traditionally, the numerical studies for such configurations assumed that the geometry of the surface imperfections is rectangular at the corners. However, an initial work by Zahn and Rist [1] showed the tremendous impact on the computed N -factor envelope curves if the edge of the corner is slightly distorted. Despite this, no parametric studies have been conducted in order to better quantify the impact of such modelling of the step geometry.

Item URL in elib:https://elib.dlr.de/195927/
Document Type:Conference or Workshop Item (Speech)
Title:INFLUENCE OF SURFACE IMPERFECTIONS WITH SLIGHTLY ROUNDED CORNERS ON THE EXPECTED LAMINAR-TURBULENCE TRANSITION LOCATION
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Franco Sumariva, Juan AlbertoUNSPECIFIEDhttps://orcid.org/0000-0002-8391-8356140143567
Paul Panuthara, JohnUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Heinritz, YannikUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Hein, StefanUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Date:30 June 2023
Journal or Publication Title:ERCOFTAC Series
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:No
Editors:
EditorsEmailEditor's ORCID iDORCID Put Code
UNSPECIFIEDERCOFTACUNSPECIFIEDUNSPECIFIED
ISSN:1382-4309
Status:Published
Keywords:laminar, transition, step, AHLNS
Event Title:15th ERCOFTAC SIG 33 Workshop, Progress in Flow Instability, Transition and Control
Event Location:Alghero, Sardinia, Italy
Event Type:Workshop
Event Start Date:28 June 2023
Event End Date:30 June 2023
Organizer:ERCOFTAC
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Efficient Vehicle
DLR - Research area:Aeronautics
DLR - Program:L EV - Efficient Vehicle
DLR - Research theme (Project):L - Aircraft Technologies and Integration
Location: Göttingen
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > High Speed Configurations, GO
Deposited By: Franco, Juan
Deposited On:09 Aug 2023 11:57
Last Modified:30 Jul 2024 15:56

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