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Time-resolved Temperature Sensitive Paint Measurements on a Hypersonic Intake Ramp

Laurence, Stuart Jon and Ozawa, Hiroshi and Martinez Schramm, Jan and Hannemann, Klaus (2018) Time-resolved Temperature Sensitive Paint Measurements on a Hypersonic Intake Ramp. In: 22nd AIAA International Space Planes and Hypersonics Systems and Technologies Conference, 2018. 22nd AIAA International Space Planes and Hypersonics Systems and Technologies Conference, 17.-19. Sep. 2018, Orlando, Florida, USA. DOI: 10.2514/6.2018-5383 ISBN 978-162410577-7

Full text not available from this repository.

Official URL: https://doi.org/10.2514/6.2018-5383

Abstract

A series of experiments is performed in the High Enthalpy shock tunnel G¨ottingen (HEG) to measure the global heat-flux distribution on a hypersonic inlet ramp, consisting of a flat plate with sidewalls at an angle of attack. A newly developed TSP formulation with relatively short excitation and emission wavelengths is employed, allowing the detrimental effects of tunnel luminosity to be minimized. The paint response is sufficiently fast and image acquisition rate sufficiently high that the heat flux on the ramp surface can be determined with a temporal resolution of approximately 100 µs. An in situ calibration procedure is introduced, as the a priori calibration is found to be inaccurate with the current TSP. Two HEG conditions are investigated, one in which the main ramp flow is laminar and the other in which it is transitional. In both cases, the corner flow regions near the sidewalls are observed to transition upstream of the main ramp flow, leading to turbulent regions spreading inwards from the sidewalls. In the transitional case, substantial two-dimensional unsteadiness is observed in the transition front location; the fast-response TSP allows this motion to be resolved and compared with unsteadiness in the reservoir supply conditions. Only weak correlation is observed between the two.

Item URL in elib:https://elib.dlr.de/123372/
Document Type:Conference or Workshop Item (Speech)
Title:Time-resolved Temperature Sensitive Paint Measurements on a Hypersonic Intake Ramp
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Laurence, Stuart JonDept. of Aerospace Engineering, University of MarylandUNSPECIFIED
Ozawa, HiroshiTokyo Metropolitan UniversityUNSPECIFIED
Martinez Schramm, JanJan.Martinez (at) dlr.deUNSPECIFIED
Hannemann, KlausKlaus.Hannemann (at) dlr.deUNSPECIFIED
Date:17 September 2018
Journal or Publication Title:22nd AIAA International Space Planes and Hypersonics Systems and Technologies Conference, 2018
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:No
DOI :10.2514/6.2018-5383
ISBN:978-162410577-7
Status:Published
Keywords:HEG, TSP, hypersonic inlet
Event Title:22nd AIAA International Space Planes and Hypersonics Systems and Technologies Conference
Event Location:Orlando, Florida, USA
Event Type:international Conference
Event Dates:17.-19. Sep. 2018
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 - Wiederverwendbare Raumfahrtsysteme
Location: Göttingen
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Spacecraft, GO
Deposited By: Martinez Schramm, Jan
Deposited On:22 Nov 2018 17:01
Last Modified:16 Jan 2019 12:33

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