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Rough wall heat flux augmentation analysis in the Framework of the ExoMars project

Neeb, Dominik and Gülhan, Ali and Merrifield, J.A. (2014) Rough wall heat flux augmentation analysis in the Framework of the ExoMars project. In: 11th AIAA/ASME Joint Thermophysics and Heat Transfer Conference. 11th AIAA/ASME Joint Thermophysics and Heat Transfer Conference, 16.-20. Juni 2014, Atlanta, USA. DOI: 10.2514/6.2014-2817

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Abstract

Surface roughness, especially if enhanced due to ablative form change, increases skin friction drag and convective heat transfer over re-entry vehicles. Although the corresponding heat flux augmentation is usually lower compared to increased friction, careful consideration in the prediction of the resulting heat load levels is required. Within the European Mars mission ExoMars, the potential roughness impact on the thermal protection system of the descent module has been analyzed based on analytical predictions, numerical calculations and dedicated experimental campaigns. This paper describes the experimental efforts in the compressible flow regime to study the impact of roughness at representative conditions. The data is discussed based on comparisons with prediction methods and results of other investigators. Based on this data the numerical predictive capabilities within the ExoMars program is characterized and validated.

Item URL in elib:https://elib.dlr.de/94743/
Document Type:Conference or Workshop Item (Speech)
Title:Rough wall heat flux augmentation analysis in the Framework of the ExoMars project
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Neeb, DominikDominik.Neeb (at) dlr.deUNSPECIFIED
Gülhan, AliDLRUNSPECIFIED
Merrifield, J.A.Fluid Gravity Engineering LtdUNSPECIFIED
Date:June 2014
Journal or Publication Title:11th AIAA/ASME Joint Thermophysics and Heat Transfer Conference
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
DOI :10.2514/6.2014-2817
Status:Published
Keywords:Rough wall, Heat flux augmentation, Hypersonics, Turbulent boundary layer, ExoMars
Event Title:11th AIAA/ASME Joint Thermophysics and Heat Transfer Conference
Event Location:Atlanta, USA
Event Type:international Conference
Event Dates:16.-20. Juni 2014
Organizer:AIAA
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Science and Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Erforschung des Weltraums
DLR - Research theme (Project):R - Projekt ExoMars
Location: Köln-Porz
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Über- und Hyperschalltechnologien
Deposited By: Neeb, Dominik
Deposited On:19 Jan 2015 16:18
Last Modified:23 Feb 2015 10:58

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