Effects of cycle parameters on engine performance at typical cruise condition are examined; high-bypass h-p cycles are shown to have potential for large improvement in specific fuel consumption compared to present-day turbofan cycles; engine and installation concept suitable for bypass ratios in 5-to-10 range is described; results of parametric analysis of engine and installation characteristics are used to compute relative aircraft range as function of cycle parameters assuming cruise sizing of engines; with use of air-cooled turbine temperatures, increases in bypass ratio up to value of 10 studied and increases in cycle pressure ratio up to value of 30 studied yield improvements in range; takeoff requirements are considered and shown to have little effect upon trends; it is pointed out that high-bypass engines need not be greatly different from current turbofans in respect to takeoff to cruise thrust relationship.


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    Title :

    High-bypass turbofan cycles for long-range subsonic transports


    Additional title:

    J Aircraft


    Contributors:

    Published in:

    Publication date :

    1966


    Size :

    5 pages


    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English