In the context of conceptual design there are low-fidelity lifting line models capable of predicting the maximum lift coefficient of trapezoidal twisted wings. However, more complex geometries like that of the blended-wing–body (BWB) require the introduction of additional geometrical hypotheses. This paper introduces a compound-wing lifting line model that predicts the maximum lift coefficient of geometries like the BWB. Such a model would decrease computation times at early design stages for the BWB. The proposed model is calibrated using Reynolds-Averaged Navier–Stokes (RANS) simulations of a regional BWB geometry near stall with three different twist distributions at low-speed conditions. Application of the calibrated compound wing model on the regional BWB geometry allows to quickly find an optimal twist distribution for this specific configuration: a semiconstant twist distribution on a fraction of the outer wing.
Predicting Maximum Lift Coefficient for Compound Wings Using Lifting Line Theory
Journal of Aircraft ; 58 , 4 ; 717-732
2021-06-03
16 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Predicting Maximum Lift Coefficient for Twisted Wings Using Lifting-Line Theory
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