Experimental analysis of the effect of suction and step height on boundary-layer transition

Dimond, Benjamin and Costantini, Marco and Klein, Christian (2022) Experimental analysis of the effect of suction and step height on boundary-layer transition. In: IUTAM Laminar-Turbulent Transition: 9th IUTAM Symposium, 38, pp. 171-180. Springer Science and Business Media B.V.. IUTAM Symposium on Laminar-Turbulent Transition 2019, 2019-09-02 - 2019-09-06, London, UK. doi: 10.1007/978-3-030-67902-6_14. ISBN 978-3-030-67902-6. ISSN 1875-3507.

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Official URL: https://doi.org/10.1007/978-3-030-67902-6_14

Abstract

Laminar flow is challenging to maintain in the presence of surface imperfections such as steps and/or gaps, which can occur at structural joints. A substantial stream-wise delay of laminar-turbulent transition, however, can be achieved with boundary-layer suction. This work examines the delay of transition that can be obtained with slit suction. Imperfections such as forward-facing steps and backward-facing steps in combination with stream-wise gaps are studied. Systematic experimental investigations were performed in the low-turbulence Cryogenic Ludwieg-Tube Göttingen for large Reynolds numbers (chord Reynolds numbers up to Rec=16⋅106), Mach numbers 0.35≤M≤0.77 and various streamwise pressure gradients. Suction proves to delay transition significantly and even overcompensates the adverse effect of surface imperfections. With suction, transition locations for backward-facing steps were measured even further downstream than for similar sized forward-facing steps.

Item URL in elib:

https://elib.dlr.de/129301/

Document Type:

Conference or Workshop Item (Poster)

Additional Information:

Hardcover ISBN 978-3-030-67901-9 Softcover ISBN 978-3-030-67904-0 eBook ISBN 978-3-030-67902-6 Series ISSN 1875-3507 Series E-ISSN 1875-3493

Title:

Experimental analysis of the effect of suction and step height on boundary-layer transition

Authors:

Authors	Institution or Email of Authors	Author's ORCID iD	ORCID Put Code
Dimond, Benjamin	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED
Costantini, Marco	UNSPECIFIED	https://orcid.org/0000-0003-0642-0199	134173785
Klein, Christian	UNSPECIFIED	https://orcid.org/0000-0001-7592-6922	153064931

Date:

2022

Journal or Publication Title:

IUTAM Laminar-Turbulent Transition: 9th IUTAM Symposium

Refereed publication:

Yes

Open Access:

Gold Open Access:

In SCOPUS:

Yes

In ISI Web of Science:

Volume:

DOI:

10.1007/978-3-030-67902-6_14

Page Range:

pp. 171-180

Editors:

Editors	Email	Editor's ORCID iD	ORCID Put Code
Sherwin, Spencer	Imperial College London, UK	UNSPECIFIED	UNSPECIFIED
Schmid, Peter	Imperial College London, UK	UNSPECIFIED	UNSPECIFIED
Wu, Xuesong	Imperial College London, UK	UNSPECIFIED	UNSPECIFIED

Publisher:

Springer Science and Business Media B.V.

Series Name:

IUTAM Book Series

ISSN:

1875-3507

ISBN:

978-3-030-67902-6

Status:

Published

Keywords:

Laminar-Turbulent Transition, Suction, Surface Imperfections, Temperature-Sensitive Paint

Event Title:

IUTAM Symposium on Laminar-Turbulent Transition 2019

Event Location:

London, UK

Event Type:

international Conference

Event Start Date:

2 September 2019

Event End Date:

6 September 2019

Organizer:

International Union of Theoretical and Applied Mechanics

Institution:

Deutsches Zentrum für Luft- und Raumfahrt e.V.

Department:

AS-EXV

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 - Virtual Aircraft and Validation

Location:

Göttingen

Institutes and Institutions:

Institute for Aerodynamics and Flow Technology > Experimental Methods, GO

Deposited By:

Micknaus, Ilka

Deposited On:

11 Oct 2019 13:38

Last Modified:

24 Apr 2024 20:32

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