Local heating compensates for conduction of heat from sensors into modules. Two hot-film sensors stacked on wind-tunnel model. Outer sensor detects changes in boundary-layer flow. Inner sensor provides active thermal isolation between outer sensor and model. Thermal boundary condition controlled at response time of detection hot-film sensor, significantly less than response time of internally heated model. Requires less power to maintain outer hot-film sensor at given temperature, enabling system to respond over greater dynamic range before power limits of instrument reached. Stacked sensors bonded to surface of most wind-tunnel models, even to curved surfaces, and removed after completion of experiments.


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    Titel :

    Active Thermal Isolation For Hot-Film Anemometers


    Beteiligte:

    Erschienen in:

    Erscheinungsdatum :

    1993-08-01



    Medientyp :

    Sonstige


    Format :

    Keine Angabe


    Sprache :

    Englisch


    Schlagwörter :


    Hot-Wire and Hot-Film Anemometers

    R. F. Blackwelder | NTIS | 1981


    Vortex anemometers - second generation

    Colton, R.F. | Tema Archiv | 1975



    Characteristics of hot-film anemometers for use in hypersonic flows

    DEMETRIADES, ANTHONY / ANDERS, SCOTT G. | AIAA | 1990