A specially designed Doppler global velocimetry system (DGV, planar Doppler velocimetry) was tested in a high-speed cryogenic facility at Mach 0.3 to Mach 0.8 and pressures between 1.2 and 2.5 bar. The necessary seeding was achieved by injecting a mixture of gaseous nitrogen and water vapor into the dry and cold tunnel flow which then immediately formed a large amount of small ice crystals. As operational and access conditions are quite restrictive with respect to other facilities, DGV is currently considered the best choice for the non-intrusive measurement of flow fields. A comparison of DGV to the more wide-spread particle image velocimetry technique (PIV) is also given.


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    Title :

    On the development of Doppler global velocimetry for cryogenic wind tunnels


    Contributors:
    Willert, C. (author) / Stockhausen, G. (author) / Klinner, J. (author) / Beversdorff, M. (author) / Quest, J. (author) / Jansen, U. (author) / Raffel, M. (author)


    Publication date :

    2003-01-01


    Size :

    958731 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



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