Short term engine deterioration occurs in less than 250 flights on a new engine and in the first flights following engine repair; while long term deterioration involves primarily hot section distress and compression system losses which occur at a somewhat slower rate. The causes for short-term deterioration are associated with clearance changes which occur in the flight environment. Analytical techniques utilized to examine the effects of flight loads and engine operating conditions on performance deterioration are presented. The role of gyroscopic, gravitational, and aerodynamic loads are discussed along with the effect of variations in engine build clearances. These analytical results are compared to engine test data along with the correlation between analytically predicted and measured clearances and rub patterns. Conclusions are drawn and important issues are discussed.


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    Titel :

    Effect of Steady Flight Loads on JT9D-7 Performance Deterioration


    Beteiligte:
    A. Jay (Autor:in) / E. S. Todd (Autor:in)

    Erscheinungsdatum :

    1978


    Format / Umfang :

    128 pages


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch