A significant percentage of high bypass ratio, turbofan engine performance deterioration was caused by an increase in operating clearance between fan/compressor and turbine blades and their outer air seals. These increased clearances resulted from rubs induced by a combination of engine power transients and aircraft flight loads. An analytical technique for predicting the effect of quasi-steady state aircraft flight loads on engine performance deterioration was developed and is presented. Thrust, aerodynamic and inertia loads were considered. Analytical results are shown and compared to actual engine test experience.


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    Title :

    Effect of flight loads on turbofan engine performance deterioration


    Contributors:
    Stakolich, E. G. (author) / Jay, A. (author) / Todd, E. S. (author) / Kafka, P. G. (author) / White, J. L. (author)

    Conference:

    Ann. Intern. Gas Turbine Conf. ; 1979 ; San Diego, CA, United States


    Publication date :

    1978-01-01


    Type of media :

    Conference paper


    Type of material :

    No indication


    Language :

    English





    Effect of flight loads on turbofan engine performance deterioration

    Stakolich, E. G. / Jay, A. / Todd, E. S. et al. | NTRS | 1979


    Effect of Flight Loads on Turbofan Engine Performance Deterioration

    E. G. Stakolich / A. Jay / E. S. Todd et al. | NTIS | 1978


    Effect of time-dependent flight loads on turbofan engine performance deterioration

    Lewis, B.L. / Jay, A. / Stakolich, E.G. | Tema Archive | 1981


    Effect of time-dependent flight loads on turbofan engine performance deterioration

    Lewis, B. L. / Jay, A. / Stakolich, E. G. | NTRS | 1981