The aircraft energy-climb trajectory for configurations with a sharp transonic drag rise is well known to possess two branches in the altitude/Mach-number plane. Transition in altitude between the two branches occurs instantaneously, a 'corner' in the minimum-time solution obtained with the energy-state model. If the initial and final values of altitude do not lie on the energy-climb trajectory, then additional jumps (crude approximations to dives and zooms) are required at the initialand terminal points. With a singular-perturbation approach, a 'boundary-layer' correction is obtained for each altitude jump, the transonic jump being a so-called 'internal' boundary layer, different in character from the initial and terminal layers. The determination of this internal boundary layer is examined and some computational results for an example presented.


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    Title :

    Altitude transitions in energy climbs


    Additional title:

    Hoehenuebergaenge und Energiezunahme bei Hochgeschwindigkeitsfluegen


    Contributors:
    Weston, A.R. (author) / Cliff, E.M. (author) / Kelley, H.J. (author)

    Published in:

    Automatica, Oxford ; 19 , 2 ; 199-202


    Publication date :

    1983


    Size :

    4 Seiten, 4 Bilder, 12 Quellen



    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




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