The details of the efforts to synthesize a control-compatible multivariable model of a liquid nitrogen cooled, gaseous nitrogen operated, closed circuit, cryogenic pressure tunnel are presented. The synthesized model was transformed into a real-time cryogenic tunnel simulator, and this model is validated by comparing the model responses to the actual tunnel responses of the 0.3 m transonic cryogenic tunnel, using the quasi-steady-state and the transient responses of the model and the tunnel. The global nature of the simple, explicit, lumped multivariable model of a closed circuit cryogenic tunnel is demonstrated.


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    Title :

    Synthesis of a control model for a liquid nitrogen cooled, closed circuit, cryogenic nitrogen wind tunnel and its validation


    Contributors:

    Publication date :

    1979-11-01


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English





    Cryogenic nitrogen as a transonic wind-tunnel test gas

    ADCOCK, J. / KILGORE, R. / RAY, E. | AIAA | 1975


    Cryogenic nitrogen as a transonic wind-tunnel test gas

    Adcock, J. B. / Kilgore, R. A. / Ray, E. J. | NTRS | 1975



    Cost effective use of liquid nitrogen in cryogenic wind tunnels

    Mcintosh, Glen E. / Lombard, David S. / Martindale, David L. et al. | NTRS | 1987