A scale model of the JT8D refan stage was tested with a scale model of the S-duct inlet design for the refanned Boeing 727 center engine. Detailed survey data of pressures, temperatures, and flow angles were obtained over a range of flows at speeds from 70 to 97 percent of design speed. Two S-duct configurations were tested; one with a bellmouth inlet and the other with a flight lip inlet. The results indicated that the overall performance was essentially unaffected by the distortion generated by the S-duct inlet. The stall weight flow increased by less than 0.5 kg/sec (approximately 1.5% of design flow) with the S-duct inlet compared with that obtained with uniform flow. The detailed measurements indicated that the inlet guide vane (IGV) significantly reduced circumferential variations. For example, the flow angles ahead of the IGV were positive in the right half of the inlet and negative in the left half. Behind the IGV, the flow angles tended to be more uniform circumferentially.


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    Title :

    Aerodynamic performance of 0.4066-scale model of JT8D refan stage with S-duct inlet


    Contributors:

    Publication date :

    1977-05-01


    Type of media :

    Miscellaneous


    Type of material :

    No indication


    Language :

    English


    Keywords :


    Aerodynamic performance of 0.4066-scale model of JT8D refan stage with S-duct inlet

    Moore, Royce D. / Kovich, George / Lewis, George W. | TIBKAT | 1977


    Aerodynamic performance of 0.4066-scale model of JT8D refan stage

    Moore, Royce D. / Kovich, George / Tysl, Edward R. | TIBKAT | 1976



    The 727/JT8D refan side nacelle airloads

    Bailey, R. W. / Vadset, H. J. | NTRS | 1974


    The 727/Jt8d Refan Side Nacelle Airloads

    R. W. Bailey / H. J. Vadset | NTIS | 1974