A new type of engine seal is being developed to meet the needs of advanced hypersonic engines. A seal braided of emerging high temperature ceramic fibers comprised of a sheath-core construction has been selected for study based on its low leakage rates. Flexible, low-leakage, high-temperature seals are required to seal the movable engine panels of advanced ramjet-scramjet engines either preventing potentially dangerous leakage into backside engine cavities or limiting the purge coolant flow rates through the seals. To predict the leakage through these flexible, porous seal structures as a function of preload and engine pressures, new analytical flow models are required. An empirical leakage resistance/preload model is proposed to characterize the observed decrease in leakage with increasing preload. Empirically determined compression modulus and preload factor are used to correlate experimental leakage data for a wide range of seal architectures. Good agreement between measured and predicted values are observed over a range of engine pressures and seal preload.


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    Titel :

    Development of hypersonic engine seals - Flow effects of preload and engine pressures


    Beteiligte:
    Cai, Zhong (Autor:in) / Mutharasan, Rajakkannu (Autor:in) / Ko, Frank K. (Autor:in) / Steinetz, Bruce M. (Autor:in)

    Kongress:

    AIAA, SAE, ASME, and ASEE, Joint Propulsion Conference and Exhibit ; 1993 ; Monterey, CA, United States


    Erscheinungsdatum :

    1993-06-01


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Keine Angabe


    Sprache :

    Englisch


    Schlagwörter :


    Development of hypersonic engine seals - Flow effects of preload and engine pressures

    Cai, Zhong / Mutharasan, Rajakkannu / Ko, Frank K. et al. | AIAA | 1994



    Development of hypersonic engine seals - Flow effects of preload andengine pressures

    CAI, ZHONG / MUTHARASAN, RAJAKKANNU / KO, FRANK et al. | AIAA | 1993


    Further Investigations of Hypersonic Engine Seals

    Dunlap, Patrick / Steinetz, Bruce / Demange, Jeffrey | AIAA | 2004