Two-dimensional rotational and vibrational temperature measurements were made at the nozzle exit of a free-piston shock tunnel using planar laser-induced fluorescence. The Mach 7 flow consisted predominantly of nitrogen with a trace quantity of nitric oxide. Nitric oxide was employed as the probe species and was excited at 225 nm. Nonuniformities in the distribution of nitric oxide in the test gas were observed and were concluded to be due to contamination of the test gas by driver gas or cold test gas.The nozzle-exit rotational temperature was measured and is in reasonable agreement with computational modeling. Nonlinearities in the detection system were responsible for systematic errors in the measurements. The vibrational temperature was measured to be constant with distance from the nozzle exit, indicating it had frozen during the nozzle expansion.


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Title :

    Fluorescence Imaging of Rotational and Vibrational Temperature in a Shock Tunnel Nozzle Flow


    Contributors:

    Conference:

    20th AIAA Advanced Measurement and Ground Testing Technology Conference ; 2001 ; Albuquerque, NM, United States


    Published in:

    Publication date :

    2003-09-01


    Type of media :

    Preprint


    Type of material :

    No indication


    Language :

    English