elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Privacy Policy | Contact | Deutsch
Fontsize: [-] Text [+]

Experimental investigation of surface imperfection effects on boundary-layer transition using temperature-sensitive paints

Costantini, Marco and Risius, Steffen and Fuchs, Carsten and Klein, Christian (2017) Experimental investigation of surface imperfection effects on boundary-layer transition using temperature-sensitive paints. 6th German-Japanese Joint Seminar, Stuttgart, Deutschland.

Full text not available from this repository.

Abstract

The effect of sharp forward-facing steps and sinusoidal bumps on boundary-layer transition was systematically investigated in this experimental work in combination with the influence of variations in the following parameters: streamwise pressure gradient, Reynolds number and Mach number. The experiments were conducted in a quasi-two-dimensional flow at high Reynolds numbers and at both low and high subsonic Mach numbers in the Cryogenic Ludwieg-Tube Göttingen. The adopted experimental setup enabled an independent variation of the aforementioned parameters and allowed a decoupling of their respective effects on the boundary-layer transition. Transition, measured non-intrusively by means of temperature-sensitive paint, was found to move gradually upstream towards the imperfection location with increaslng non-dimensional imperfection parameters. Stronger flow acceleration led to an increase in the transltlon Reynolds number even in the presence of forward-facing steps and bumps; this favorable influence became, however, less pronounced at larger values of the non-dimensional lmperfection parameters.

Item URL in elib:https://elib.dlr.de/118201/
Document Type:Conference or Workshop Item (Speech)
Title:Experimental investigation of surface imperfection effects on boundary-layer transition using temperature-sensitive paints
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Costantini, MarcoMarco.Costantini (at) dlr.dehttps://orcid.org/0000-0003-0642-0199
Risius, Steffensteffen.risius (at) dlr.deUNSPECIFIED
Fuchs, Carstencarsten.fuchs (at) dlr.deUNSPECIFIED
Klein, ChristianChristian.Klein (at) dlr.deUNSPECIFIED
Date:2017
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Temperature-Sensitive Paint, Boundary Layer, Transition, Surface lmperfection
Event Title:6th German-Japanese Joint Seminar
Event Location:Stuttgart, Deutschland
Event Type:international Conference
Organizer:Universität Hohenheim
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
Location: Göttingen
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Experimental Methods, GO
Deposited By: Bachmann, Barbara
Deposited On:31 Jan 2018 11:37
Last Modified:31 Jan 2018 11:37

Repository Staff Only: item control page

Browse
Search
Help & Contact
Information
electronic library is running on EPrints 3.3.12
Copyright © 2008-2017 German Aerospace Center (DLR). All rights reserved.