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.
Altitude transitions in energy climbs
Hoehenuebergaenge und Energiezunahme bei Hochgeschwindigkeitsfluegen
Automatica, Oxford ; 19 , 2 ; 199-202
1983
4 Seiten, 4 Bilder, 12 Quellen
Aufsatz (Zeitschrift)
Englisch
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