The characteristics of fountains below hovering multi-nozzle VTOL vehicles have been determined from experimental data. Specifically, the thermodynamic and entrainment parameters of the fountain core, and the effects of the blocking surface on the fountain and of the fountain on ground jet entrainment are presented. The fountain-related interference effects are also discussed. It is found that the thermodynamic characteristics of the fountain are significantly higher than predicted, that the interference effects are of the same magnitude as the fountain-coreproduced forces, and that the fountains lose mass or have negative entrainment characteristics under certain conditions. (Kursetz)
Aerodynamic and thermodynamic characteristics of flow fields below VTOL vehicles in ground proximity
Aerodynamische und thermodynamische Charakteristik von Stroemungsfeldern unter Senkrechtstartflugzeugen bei Grundnaehe
AIAA-Papers ; Jan ; 1-14
1979
14 Seiten, 37 Bilder, 8 Quellen
Aufsatz (Konferenz)
Englisch
Ground proximity and VTOL aircraft
Engineering Index Backfile | 1962
|Engineering Index Backfile | 1960
|Aerodynamic characteristics in ground proximity
NTRS | 1976
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