Correlated optimum lift coefficient and thrust-vector angle for longitudinal performance

Laurent Bovet (1, 2)

1 CReA - Centre de Recherche de l'École de l'air
2 CEMEF - Centre de Mise en Forme des Matériaux

This note explores the optimization of thrust-vector angle for the cruise and initial climb phases of an airliner. For each performance, the lift coefficient and thrust-vector angle have been optimized simultaneously leading to a global optimum. However, the gain offered on the longitudinal performance by an ad-hoc inclination is limited. Finally, analytical expressions of the optimum thrust-vector angle have been derived for each performance, in complement to the expressions already provided by former studies on this subject.

Mots clés: Aircraft design; Optimization; Thrust-vector angle; Longitudinal flight; Performance

Domaines: Matériaux

Laurent Bovet. Correlated optimum lift coefficient and thrust-vector angle for longitudinal performance. Aerospace Science and Technology, 2017, 67, pp.141 - 143. ⟨10.1016/j.ast.2017.04.003⟩. ⟨hal-01521341⟩