Lift Prediction of Spanwise Cambered Delta Wings

摘要

An analytic prediction method is derived to estimate the lift of delta wings with constant anhedral or dihedral, i.e. a V wing. The method is based on the leading-edge suction analogy, with expressions for leading-edge suction being developed that account for anhedral and dihedral. An empirical correction is combined with the resulting expression to incorporate an effective leading-edge sweep interpretation of wing roll. This approach allows an estimation of the disparate effects of anhedral and dihedral. The attached flow lift component is estimated using a Trefftz plane expression for the apparent mass of aV wing. Comparisons are made with a variety of planforms, with encouraging agreement between theory and experiment being demonstrated.