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Hypersonic boundary-layer stabilization by means of ultrasonically absorptive carbon-carbon material - Part 2: Computational Analysis

Wartemann, Viola and Eggers, Thino and Giese, Tobias and Wagner, Alexander and Hannemann, Klaus (2013) Hypersonic boundary-layer stabilization by means of ultrasonically absorptive carbon-carbon material - Part 2: Computational Analysis. 51st AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition, 07. - 10. Jan. 2013, Grapevine, Texas.

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Abstract

The damping of acoustic second mode instabilities by passive porous surfaces is investigated numerically and compared with experiments for different hypersonic boundary-layer flows. The used geometry is a blunt 7° half-angle cone model with exchangeable nose. The cone surface consists partly of an ultrasonically absorptive material, which has a natural, random porosity. For the analyses of the second modes the DLR stability code NOLOT, NOnLocal Transition analysis code, is used. The influence of the nose radius and the unit Reynolds number on the second modes is investigated using a smooth surface. These results of the smooth surface are compared with those of the porous surface to study the damping effect on the second modes and the transition shift. The numerical results are compared with wind tunnel measurements, which were performed in the DLR High Enthalpy Shock Tunnel Göttingen (HEG).

Item URL in elib:https://elib.dlr.de/80676/
Document Type:Conference or Workshop Item (Speech, Paper)
Title:Hypersonic boundary-layer stabilization by means of ultrasonically absorptive carbon-carbon material - Part 2: Computational Analysis
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Wartemann, ViolaUNSPECIFIEDUNSPECIFIED
Eggers, ThinoUNSPECIFIEDUNSPECIFIED
Giese, TobiasUNSPECIFIEDUNSPECIFIED
Wagner, AlexanderUNSPECIFIEDUNSPECIFIED
Hannemann, KlausUNSPECIFIEDUNSPECIFIED
Date:January 2013
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:hypersonic boundary layer stabilitzation, HEG, NOLOT, cone experiment, porous surface
Event Title:51st AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition
Event Location:Grapevine, Texas
Event Type:international Conference
Event Dates:07. - 10. Jan. 2013
Organizer:AIAA
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 - Shefex III
Location: Braunschweig , Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Spacecraft
Deposited By: Wartemann, Viola
Deposited On:23 Apr 2013 14:02
Last Modified:12 Dec 2013 21:58

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