The performance and distortion levels of the right inlet of the F/A-18A High Alpha Research Vehicle were assessed during maneuvers with rapidly changing angle-of-attack at the NASA Dryden Flight Research Center, Edwards, California. The distortion levels were compared with those produced by current inlet-engine compatibility evaluation techniques. The objective of these analyses was to determine whether the results obtained for steady aerodynamic conditions were adequate to describe the inlet-generated distortion levels that occur during rapid aircraft maneuvers. Levels of inlet recovery, peak dynamic circumferential distortion, and peak dynamic radial distortion of dynamic maneuvers for a General Electric F404-GE-400 turbofan engine were compared with estimations based on steady aerodynamic conditions. The comparisons were performed at equivalent angle-of-attack, angle-of-sideslip, and Mach number. Results showed no evidence of peak inlet distortion levels being elevated by dynamic maneuver conditions at high angle-of-attack compared with steady aerodynamic estimations. The dynamic maneuvers were shown to be effective at identifying conditions when discrete changes in inlet behavior occur.


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    Title :

    F/A-18A Inlet Flow Characteristics During Maneuvers with Rapidly Changing Angle of Attack


    Contributors:
    A. J. Yuhas (author) / W. G. Steenken (author) / J. G. Williams (author) / K. R. Walsh (author)

    Publication date :

    1997


    Size :

    24 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English




    F/A-18A Inlet Flow Characteristics During Maneuvers with Rapidly Changing Angle of Attack

    Yuhas, Andrew J. / Steenken, William G. / Williams, John G. et al. | NTRS | 1997



    Inlet Flow Characteristics During Rapid Maneuvers for an F/A-18A Airplane

    Steenken, William G. / Williams, John G. / Walsh, Kevin R. | NTRS | 1999



    Inlet Flow Characteristics During Rapid Maneuvers for an F/A-18A Airplane

    W. G. Steenken / J. G. Williams / K. R. Walsh | NTIS | 1999