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Time Response Calibration of Ultra-Fast Temperature Sensitive Paints for the Application in High Temperature Hypersonic Flows

Martinez Schramm, Jan (2018) Time Response Calibration of Ultra-Fast Temperature Sensitive Paints for the Application in High Temperature Hypersonic Flows. In: 21th STAB/DGLR Symposium on New Results in Numerical and Experimental Fluid Mechanics. 21. STAB/DGLR Symposium 2018, 6.-7. Nov. 2018, Darmstadt.

Full text not available from this repository.

Official URL: https://www.sla.tu-darmstadt.de/stab_2018/stab2018_home.de.jsp

Abstract

Ultra-fast measurements (acquisition rates of 1MHz) of time varying surface temperatures using temperature sensitive paints, TSPs, is a very promising but also challenging technique to obtain experimental heat flux distributions in hot hypersonic impulse facilities. The demand on experimental data of heat flux distributiosn in hot hypersonic ground based testing facilities [1] drives the development of the classical TSP techniques towards ultra-fast applications. A main advantage over classical measurement techniques used over the last five decades [2], such as thermocouple or thin film gauge measurements is that spatially highly resolved data can be obtained with TSP. Additionally a reduction of the huge preparation times of wind tunnel models (generally required due to the integration of a large number of temperature gauges) is possible. However, compared to the application of TSP in low speed flows or in continuously running ground based test facilities, the utilization of the TSP technique in impulse facilities results in a number of new specific requirements and challengs not completely resolved so far. Therefore, this paper will present a calibration setup to determine the response time of thin thermal active layers which are constructed from TSP solutions. A high power laser system is used to generate a Gaussian laser spot on a TSP have a duration of a few ns only. A complete TSP system is used to measure the time response function (temperature decay). The decay functions can be used to characterize the response time of the TSP used and its dependence on the thickness of the TSP layer. The experimental results will be presented and on the basis of the analysis, conclusions that can be drawn with respect to the applicability in hot hypersonic hypersonic impulse facilities will be discussed.

Item URL in elib:https://elib.dlr.de/119349/
Document Type:Conference or Workshop Item (Speech)
Title:Time Response Calibration of Ultra-Fast Temperature Sensitive Paints for the Application in High Temperature Hypersonic Flows
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Martinez Schramm, JanAS-RFZUNSPECIFIED
Date:6 November 2018
Journal or Publication Title:21th STAB/DGLR Symposium on New Results in Numerical and Experimental Fluid Mechanics
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Series Name:Notes on Numerical Fluid Mechanics and Multidisciplinary Design
Status:Published
Keywords:temperature sensitive paints, high enthalpy shock tunnel, HEG, TSP, thin layers
Event Title:21. STAB/DGLR Symposium 2018
Event Location:Darmstadt
Event Type:national Conference
Event Dates:6.-7. Nov. 2018
Organizer:Technische Universität Darmstadt
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 und Antriebstechnologie
Location: Göttingen
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Spacecraft, GO
Deposited By: Martinez Schramm, Jan
Deposited On:20 Jan 2019 14:22
Last Modified:20 Jan 2019 14:34

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