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Experimental Investigation of Mixed Convection in Horizontal Channel Flow in Combination with Cylindrical Roughness Elements

Mäteling, Esther and Lemarechal, Jonathan and Klein, Christian and Puckert, Dominik K. and Rist, Ulrich (2018) Experimental Investigation of Mixed Convection in Horizontal Channel Flow in Combination with Cylindrical Roughness Elements. In: 21th STAB/DGLR Symposium on New Results in Numerical and Experimental Fluid Mechanics, pp. 134-135. 21. STAB/DGLR Symposium 2018, 06. - 07. Nov. 2018, Darmstadt, Deutschland.

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Official URL: https://www.sla.tu-darmstadt.de/stab_2018/stab2018_home.de.jsp

Abstract

In the laminar flat-plate flow of the laminar water channel (Institute of Aerodynamics and Gas Dynamics, University of Stuttgart) the influence of a heated wall on the flow is investigated. In the investigated parameter range a mixed convection flow develops. This flow is further influenced by single roughness elements. The mixed convection flow and the wake of the roughness element influence each other. The investigated parameter range spanned a Reynolds numbers from 398 ≤ Rek ≤ 1195 and Grashof numbers from 3.1 10^9 ≤ Gr ≤ 4.6 10^9. The Temperature-Sensitive Paint is used for temperature measurements and flow visualization of the developing longitudinal vortices. The results show that the additional roughness elements improve the heat transfer. Also the wake of the cylindrical roughness element is altered by the strong heating of the bottom wall.

Item URL in elib:https://elib.dlr.de/122976/
Document Type:Conference or Workshop Item (Speech)
Title:Experimental Investigation of Mixed Convection in Horizontal Channel Flow in Combination with Cylindrical Roughness Elements
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Mäteling, EstherLehrstuhl für Strömungslehre und Aerodynamisches Institut, RWTH Aachen UniversityUNSPECIFIED
Lemarechal, JonathanJonathan.Lemarechal (at) dlr.deUNSPECIFIED
Klein, Christianchristian.klein (at) dlr.deUNSPECIFIED
Puckert, Dominik K.Institut für Aerodynamik und Gasdynamik, Universität StuttgartUNSPECIFIED
Rist, UlrichInstitut für Aerodynamik und Gasdynamik, Universität StuttgartUNSPECIFIED
Date:November 2018
Journal or Publication Title:21th STAB/DGLR Symposium on New Results in Numerical and Experimental Fluid Mechanics
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 134-135
Status:Published
Keywords:Temperature-Sensitive Paint, TSP, Mixed Convection, Roughness Element
Event Title:21. STAB/DGLR Symposium 2018
Event Location:Darmstadt, Deutschland
Event Type:national Conference
Event Dates:06. - 07. Nov. 2018
Organizer:Technische Universität Darmstadt, STAB
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: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: Micknaus, Ilka
Deposited On:03 Dec 2018 14:02
Last Modified:03 Dec 2018 14:02

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