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Passive Hypersonic Boundary Layer Transition Control Using Ultrasonically Absorptive Carbon-Carbon Ceramic with Random Microstructure

Wagner, Alexander and Kuhn, Markus and Martinez Schramm, Jan and Hannemann, Klaus (2014) Passive Hypersonic Boundary Layer Transition Control Using Ultrasonically Absorptive Carbon-Carbon Ceramic with Random Microstructure. 19. DGLR-Fachsymposium der STAB, 04. - 05. Nov. 2014, München, Deutschland.

Full text not available from this repository.

Official URL: http://www.stab2014.tum.de/

Abstract

For the first time the influence of ultrasonically absorptive carbon-carbon material on hypersonic laminar to turbulent boundary-layer transition was investigated experimentally. A 7° half-angle blunted cone with a nose radius of 2.5 mm and a total length of 1077 mm was tested at zero angle of attack in the High Enthalpy Shock Tunnel Göttingen (HEG) of the German Aerospace Center (DLR) at Mach 7.5. One third of the model surface in circumferential direction was equipped with a in-house manufactured ultrasonically absorptive carbon-carbon material with random microstructure for passive transition control. The remaining model surface consisted of polished steel and served as reference surface. The study revealed a clear damping of the second-mode instabilities and a delay of boundary layer transition along the ultrasonically absorptive carbon-carbon insert.

Item URL in elib:https://elib.dlr.de/91740/
Document Type:Conference or Workshop Item (Speech)
Title:Passive Hypersonic Boundary Layer Transition Control Using Ultrasonically Absorptive Carbon-Carbon Ceramic with Random Microstructure
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Wagner, Alexanderalexander.wagner (at) dlr.deUNSPECIFIED
Kuhn, Markusmarkus.kuhn (at) dlr.deUNSPECIFIED
Martinez Schramm, Janjan.martinez (at) dlr.deUNSPECIFIED
Hannemann, Klausklaus.hannemann (at) dlr.deUNSPECIFIED
Date:2014
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Series Name:Jahresbericht 2014
Status:Published
Keywords:Passive Hypersonic Boundary Layer Transition Control, Ultrasonically Absorptive Carbon-Carbon Ceramic, High Enthalpy Shock Tunnel Göttingen (HEG)
Event Title:19. DGLR-Fachsymposium der STAB
Event Location:München, Deutschland
Event Type:national Conference
Event Dates:04. - 05. Nov. 2014
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Transport
DLR - Research area:Raumfahrt
DLR - Program:R RP - Raumtransport
DLR - Research theme (Project):R - Raumfahrzeugsysteme - Numerische Verfahren und Simulation
Location: Göttingen , Stuttgart
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Spacecraft
Institute of Structures and Design > Space System Integration
Deposited By: Micknaus, Ilka
Deposited On:21 Nov 2014 09:56
Last Modified:27 Feb 2015 14:13

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