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Boundary Layer Transition Studies on the HEXAFLY-INT Hypersonic Glide Vehicle

Wagner, Alexander and Martinez Schramm, Jan and Wartemann, Viola and Ponchio Camillo, Giannino and Ozawa, Hiroshi and Steelant, Johan (2021) Boundary Layer Transition Studies on the HEXAFLY-INT Hypersonic Glide Vehicle. In: Boundary Layer Transition Studies on the HEXAFLY-INT Hypersonic Glide Vehicle. European Symposium on Laminar-Turbulent Transition in Hypersonic Regime, 2021-05-25 - 2021-05-26, Bordeaux, France - online.

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Official URL: https://www.hyfar-ara.org/2021-conference_transition_lt/

Abstract

The present experimental study addresses natural boundary layer transition and the effect of surface imperfections such as steps and gaps on the boundary layer state of the HEXAFLY-INT hypersonic glider. An experimental test campaign using a 1:2.6 scaled model was carried out in the High Enthalpy Shock Tunnel Gottingen (HEG) at Mach 7.4. The artificial steps and gaps on the surface are generated by means of e.g. adjustable leading edge segments which are precise scaled down elements of the flight vehicle segments. The purpose of the study is to reproduce unavoidable surface imperfections caused for instance by different thermal expansion at material junctions during flight. The experimental tests essentially helped revealing the existence of a vortex pair which after breaking down forms turbulent wedges. Until the experimental tests in HEG the existence of the vortex pair was unknown. This led to a revision of the thermal boundary conditions for the HEXAFLY-INT glider thermal analysis since the surface heat flux density in the area wetted by the turbulent wedges was found to locally increase up to five times above the laminar heat flux level.

Item URL in elib:https://elib.dlr.de/142640/
Document Type:Conference or Workshop Item (Speech)
Title:Boundary Layer Transition Studies on the HEXAFLY-INT Hypersonic Glide Vehicle
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Wagner, AlexanderUNSPECIFIEDhttps://orcid.org/0000-0002-9700-1522UNSPECIFIED
Martinez Schramm, JanUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Wartemann, ViolaUNSPECIFIEDhttps://orcid.org/0000-0002-1920-3364UNSPECIFIED
Ponchio Camillo, GianninoUNSPECIFIEDhttps://orcid.org/0000-0002-2178-0777UNSPECIFIED
Ozawa, HiroshiTokyo Metropolitan UniversityUNSPECIFIEDUNSPECIFIED
Steelant, JohanUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Date:26 May 2021
Journal or Publication Title:Boundary Layer Transition Studies on the HEXAFLY-INT Hypersonic Glide Vehicle
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 transition, HEG, hypersonic glider, HEXAFLY-INT, roughness induced transition
Event Title:European Symposium on Laminar-Turbulent Transition in Hypersonic Regime
Event Location:Bordeaux, France - online
Event Type:Workshop
Event Start Date:25 May 2021
Event End Date:26 May 2021
Organizer:HyFAR-ARA
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Transportation
DLR - Research area:Raumfahrt
DLR - Program:R RP - Space Transportation
DLR - Research theme (Project):R - Reusable Space Systems and Propulsion Technology
Location: Braunschweig , Göttingen
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Spacecraft, GO
Institute for Aerodynamics and Flow Technology > Spacecraft, BS
Deposited By: Wagner, Alexander
Deposited On:22 Jun 2021 10:07
Last Modified:24 Apr 2024 20:42

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