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Experimental investigation of hypersonic boundary-layer transition on a cone model in the High Enthalpy Shock Tunnel (HEG) at Mach 7.5

Wagner, Alexander and Laurence, Stuart and Martinez Schramm, Jan and Hannemann, Klaus and Wartemann, Viola and Lüdeke, Heinrich and Tanno, Hideyuki and Ito, Katsuhiro (2011) Experimental investigation of hypersonic boundary-layer transition on a cone model in the High Enthalpy Shock Tunnel (HEG) at Mach 7.5. Seminar, 19.04.2011, California Institute of Technology (Caltech), Los Angeles, Kalifornien.

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Abstract

Hypersonic boundary-layer transition on a 7 half-angle cone was investigated experimentally iin the DLR High Enthalpy Shock Tunnel Göttingen (HEG) at Mach 7.5. The cone model, provided by the Japan Aerospace Exploration Agency (JAXA), has a length of 1100mm and was tested with nose radii of 2.25mm and 5mm. The free-stream unit Reynolds number was varied over the range of 1.2*10^6 /m to 6.2*10^6 /m at a stagnation enthalpy of H0 = 3.3MJ/kg. The model was equipped with co-axial thermocouples to determine the transition location by means of the surface heat-flux distribution. Ten flush mounted piezoelectric fast-response pressure transducers were used to measure the pressure fluctuations in the boundary-layer associated with second mode instabilities. The results are compared to stability calculations conducted with the DLR NOn-LOcal Transition analysis code, NOLOT.

Document Type:Conference or Workshop Item (Speech)
Title:Experimental investigation of hypersonic boundary-layer transition on a cone model in the High Enthalpy Shock Tunnel (HEG) at Mach 7.5
Authors:
AuthorsInstitution or Email of Authors
Wagner, Alexanderalexander.wagner@dlr.de
Laurence, Stuartstuart.laurence@dlr.de
Martinez Schramm, Janjan.schramm@dlr.de
Hannemann, Klausklaus.hannemann@dlr.de
Wartemann, Violaviola.wartemann@dlr.de
Lüdeke, Heinrichheinrich.luedeke@dlr.de
Tanno, Hideyukitanno.hideyuki@jaxa.jp
Ito, KatsuhiroIto.Katsuhiro@jaxa.jp
Date:2011
Keywords:HEG, transition, hypersonic flow, cone, Mach 8, Mack modes, second mode instability, stability analysis, NOLOT
Event Title:Seminar
Event Location:California Institute of Technology (Caltech), Los Angeles, Kalifornien
Event Type:Other
Event Dates:19.04.2011
Organizer:Joseph E. Shepherd
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W RP - Raumtransport
DLR - Research area:Space
DLR - Program:W RP - Raumtransport
DLR - Research theme (Project):W - Projekt IMENS-3C (old)
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Spacecraft
Deposited By: Alexander Wagner
Deposited On:18 May 2011 14:19
Last Modified:18 May 2011 14:19

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