Accession Number : ADA476494


Title :   Shock Wave / Boundary Layer Interaction Experiment on Control Surface


Descriptive Note : Conference paper


Corporate Author : EIDGENOESSISCHE TECHNISCHE HOCHSCHULE ZURICH (SWITZERLAND) INST OF FLUID DYNAMICS


Personal Author(s) : Schlamp, Stefan ; Prochazka, Lukas ; Rosgen, Thomas


Full Text : http://www.dtic.mil/get-tr-doc/pdf?AD=ADA476494


Report Date : 01 JUN 2007


Pagination or Media Count : 23


Abstract : 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.


Descriptors :   *BOUNDARY ELEMENT METHODS , ALGORITHMS , DETECTORS , MODELS , STATE OF THE ART , FINITE ELEMENT ANALYSIS , SHOCK WAVES , COMPUTATIONAL FLUID DYNAMICS , INFRARED IMAGES , HEAT FLUX , THERMOCOUPLES , LECTURES


Subject Categories : ELECTROOPTICAL AND OPTOELECTRONIC DEVICES
      NUMERICAL MATHEMATICS


Distribution Statement : APPROVED FOR PUBLIC RELEASE