The use of planar laser-induced fluorescence (PLIF) of nitric oxide (NO) was inves-tigated for use in visualizing wake flowfields downstream of rapid prototyping models in a hypersonic wind tunnel. The re-entry models for use in this study were fabricated using a stereo-lithography apparatus. These models were produced in one day or less, which is a significant time savings compared with the manufacture of ceramic or metal models. The models were tested in the NASA Langley Research Center 31-Inch Mach 10 Air Tunnel. 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. Various entry capsule model types and configurations and NO-seeding methods were used, including a new streamwise visualization method based on PLIF. Virtual diagnostics interface technology, developed at NASA Langley Research Center, was used to visualize the datasets in post-processing. The use of calibration ‘dotcards’ was investigated to correct for camera perspective and lens distortions in the PLIF images.


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    Title :

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


    Contributors:
    Danehy, P M (author) / Alderfer, D W (author) / Inman, J A (author) / Berger, K T (author) / Buck, G M (author) / Schwartz, R J (author)


    Publication date :

    2008-05-01


    Size :

    15 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English






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


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    Alderfer, D. W. / Danehy, P. M. / Inma, J. A. et al. | NTRS | 2007


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

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