Shock Wave / Boundary Layer Interaction Experiment on Control Surface

The shock wave / boundary layer interaction (SWBLI) experiment is part of the EXPERT mission. SWBLI is studied on two identical fixed compression ramps made of C/SiC, which are models for control surfaces. The flow separates on the flat surfaces upstream of the compression ramps and reattaches on th...

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Bibliographic Details
Main Authors: Schlamp, Stefan, Prochazka, Lukas, Rosgen, Thomas
Format: Report
Language:English
Subjects:
ALGORITHMS
BOUNDARY ELEMENT METHODS
COMPUTATIONAL FLUID DYNAMICS
DETECTORS
Electrooptical and Optoelectronic Devices
FINITE ELEMENT ANALYSIS
FOREIGN REPORTS
HEAT FLUX
INFRARED IMAGES
LECTURES
NATO FURNISHED
Numerical Mathematics
SHOCK WAVES
STATE OF THE ART
THERMOCOUPLES
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Summary:The shock wave / boundary layer interaction (SWBLI) experiment is part of the EXPERT mission. SWBLI is studied on two identical fixed compression ramps made of C/SiC, which are models for control surfaces. The flow separates on the flat surfaces upstream of the compression ramps and reattaches on the ramp surfaces. A reattachment shock results, which interacts with the boundary layer. One ramp is instrumented with thermocouples. An infrared camera (InGaAs detector array) views the inside of the second flap. A 50 nm bandpass in front of the detector extends its temperature measurement range to over 2,000 K. This provides temperature maps with a spatial resolution of O(1 mm) at 30 Hz. The heat flux on the flap's exterior is obtained from the temperature distribution history and the known thermal properties of the structure using an inverse method. The locations of the detachment and reattachment shocks are very sensitive to numerical errors and changes of the flow conditions. This flow phenomenon is thus highly suitable to validate numerical results and to examine if and how wind tunnel results can be extrapolated to re-entry flows. The status quo of the payload design is described; CFD and FEM results are presented. See also ADM002057., The original document contains color images. Presented during the RTO-EN-AVT-130 RTO AVT/VKI Lecture Series held at the von Karman Institute, Rhode St. Genese, Belgium, on 24-27 Oct 2005.