Four configurations of rounded shoulder boattail nozzles were tested on an underwing nacelle mounted on an F-106B aircraft. The effects of various parameters on boattail drag were investigated at Mach numbers of 0.6 and 0.9. The parameters studied were Reynolds number, angle-of-attack, nozzle pressure ratio, nozzle geometry, and nozzle axial location with respect to the wing. These nozzles simulated nonafterburning configurations appropriate for turbofan powered aircraft with supersonic dash capability. Increasing Reynolds number significantly lowered the boattail drag coefficient of all the nozzles at both M sub 0en1 = 0.6 and M sub 0 = 0.9. (Author)


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    Title :

    Flight Investigation of 24 Deg Boattail Nozzle Drag at Varying Subsonic Flight Conditions


    Contributors:

    Publication date :

    1972


    Size :

    69 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English