Zero-length, slotted-lip inlet performance and associated fan blade stresses were determined during model tests using a 20-inch diameter fan simulator in the NASA-LeRC 9- by 15-foot low-speed wind tunnel. The model configuration variables consisted of inlet contraction ratio, slot width, circumferential extent of slot fillers, and length of a constant area section between the inlet throat and fan face. Inlet configurations having contraction ratios of 1.2 and 1.3 satisfied all critical low-speed inlet operating requirements for a fixed horizontal nacelle and tilt-nacelle-type subsonic V/STOL aircraft, respectively. Relative to a conventional axisymmetric tilt-nacelle inlet, the zero-length, slotted-lip inlet has a 27-percent smaller inlet lip contraction ratio, an 83-percent shorter total length, and a 5-percent smaller maximum cowl diameter.


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    Title :

    Zero-length, slotted-lip inlet for subsonic military aircraft


    Contributors:

    Conference:

    Joint Propulsion Conference ; 1980 ; Hartford, CT


    Publication date :

    1980-06-01


    Type of media :

    Conference paper


    Type of material :

    No indication


    Language :

    English


    Keywords :


    Zero-length, slotted-lip inlet for subsonic military aircraft

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    Zero-length inlets for subsonic V/STOL aircraft

    GLASGOW, E. / BECK, W. / WOOLLETT, R. | AIAA | 1981


    Zero-length inlets for subsonic V/STOL aircraft

    GLASGOW, E. R. / BECK, W. E. / WOOLLETT, R. R. | AIAA | 1983