Reentry models for use in hypersonic wind tunnel tests were fabricated using a stereolithography apparatus. These models were produced in one day or less, which is a significant time savings compared to the manufacture of ceramic or metal models. The models were tested in the NASA Langley Research Center 31-Inch Mach 10 Air Tunnel. Most of the models did not survive repeated tests in the tunnel, and several failure modes of the models were identified. Planar laser-induced fluorescence (PLIF) of nitric oxide (NO) was used to visualize the flowfields in the wakes of these models. Pure NO was either seeded through tubes plumbed into the model or via a tube attached to the strut holding the model, which provided localized addition of NO into the model s wake through a porous metal cylinder attached to the end of the tube. Models included several 2-inch diameter Inflatable Reentry Vehicle Experiment (IRVE) models and 5-inch diameter Crew Exploration Vehicle (CEV) models. Various configurations were studied including different sting placements relative to the models, different model orientations and attachment angles, and different NO seeding methods. The angle of attack of the models was also varied and the location of the laser sheet was scanned to provide three-dimensional flowfield information. Virtual Diagnostics Interface technology, developed at NASA Langley, was used to visualize the data sets in post processing. The use of calibration "dotcards" was investigated to correct for camera perspective and lens distortions in the PLIF images. Lessons learned and recommendations for future experiments are discussed.


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    Titel :

    Fluorescence Visualization of Hypersonic Flow over Rapid Prototype Wind-Tunnel Models


    Beteiligte:
    Alderfer, D. W. (Autor:in) / Danehy, P. M. (Autor:in) / Inma, J. A. (Autor:in) / Berger, K. T. (Autor:in) / Buck, G. M. (Autor:in) / Schwartz, R J. (Autor:in)

    Kongress:

    45th AIAA Aerospace Sciences Meeting and Exhibit ; 2007 ; Reno, NV, United States


    Erscheinungsdatum :

    2007-01-01


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Keine Angabe


    Sprache :

    Englisch


    Schlagwörter :


    Fluorescence Visualization of Hypersonic Flow Over Rapid Prototype Wind-Tunnel Models

    Alderfer, David / Danehy, Paul / Inman, Jennifer et al. | AIAA | 2007


    Fluorescence Visualization of Hypersonic Flow Over Rapid Prototype Wind-Tunnel Models AIAA Paper

    Alderfer, D. / Danehy, P. / Inman, J. et al. | British Library Conference Proceedings | 2007


    Fluorescence imaging and streakline visualization of hypersonic flow over rapid prototype wind-tunnel models

    Danehy, P M / Alderfer, D W / Inman, J A et al. | SAGE Publications | 2008