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Rarefied Aerothermodynamics Technology Development for Future High-Altitude High-Speed Transport (EU-FAST20XX)

Votta, Raffaele and Marini, Marco and Ranuzzi, Giuliano and Schlegat, Thomas and Hannemann, Klaus and Schwanekamp, Tobias and Sippel, Martin (2013) Rarefied Aerothermodynamics Technology Development for Future High-Altitude High-Speed Transport (EU-FAST20XX). AIAA SPACE 2013 Conference and Exposition, 10. - 12. Sept. 2013, San Diego, CA, USA.

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Official URL: http://arc.aiaa.org/doi/abs/10.2514/6.2013-5330

Abstract

First subject of the present paper has been the experimental and numerical characterization of test chamber flow of DLR-V2G low-density wind tunnel, in the frame of EU-FP7 FAST20XX project activities dedicated to the validation of numerical tools able to predict rarefaction effects in suborbital flight. Pitot pressure radial profiles measured at different positions downstream the test chamber have been compared at nozzle exit to numerical results obtained with different methodologies accounting for rarefaction effects (CFD with slip-flow boundary conditions, a hybrid CFD-DSMC procedure), and a re-definition of the V2G facility envelope in terms of flight-relevant parameters (Mach, Reynolds, Knudsen numbers) has been presented. A good agreement between experiments and numerical results has been achieved for M=12 and M=16 cases (not as good for M=22), thus confirming that the test chamber flow knowledge is of fundamental importance for a proper numerical rebuilding of an experimental test campaign. Further, the aerodynamic coefficients of lift, drag and pitching moment of the analyzed lifting body configuration have been experimentally determined by means of three component force and moment measurements in V2G and the influence of rarefaction onto the aerodynamic coefficients have been shown. The results have numerically been validated by means of DSMC calculations. After the validation of the numerical tools, the high altitude effects to the future hypersonic/suborbital re-entry vehicle SpaceLiner have been analyzed. Bridging functions have been developed and validated by means of DSMC calculations. The effects of rarefaction on global longitudinal aerodynamics of SpaceLiner in the range of altitude 65÷85 km have been pointed out by comparing to the aerodatabase in continuum regime conditions. DSMC computation has been done in the higher SpaceLiner altitude point confirming the bridging function results and providing heat transfer estimations. Two versions of SpaceLiner have been analyzed: SL4.3 and SL7.1.

Item URL in elib:https://elib.dlr.de/85236/
Document Type:Conference or Workshop Item (Speech)
Additional Information:DOI: 10.2514/6.2013-5330
Title:Rarefied Aerothermodynamics Technology Development for Future High-Altitude High-Speed Transport (EU-FAST20XX)
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Votta, RaffaeleCIRA, ItalyUNSPECIFIED
Marini, MarcoCIRA, ItalyUNSPECIFIED
Ranuzzi, GiulianoCIRA, ItalyUNSPECIFIED
Schlegat, ThomasThomas.Schlegat (at) dlr.deUNSPECIFIED
Hannemann, KlausKlaus.Hannemann (at) dlr.deUNSPECIFIED
Schwanekamp, TobiasTobias.Schwanekamp (at) dlr.deUNSPECIFIED
Sippel, Martinmartin.sippel (at) dlr.dehttps://orcid.org/0000-0001-7356-7575
Date:2013
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Series Name:Conference Proceedings online
Status:Published
Keywords:rarefied flow, low density, Vacuum wind tunnel; V2G; VxG; force measurements; aerodynamic coefficients; lifting body; lift; drag; pitching moment; experimental and numerical analysis; CFD; DSMC; FAST20XX
Event Title:AIAA SPACE 2013 Conference and Exposition
Event Location:San Diego, CA, USA
Event Type:international Conference
Event Dates:10. - 12. Sept. 2013
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 - EU Projekte Raumtransport (old)
Location: Bremen , Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Spacecraft
Institute of Space Systems > Space Launcher Systems Analysis
Deposited By: Micknaus, Ilka
Deposited On:29 Nov 2013 10:49
Last Modified:13 Jun 2018 15:01

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