Adaptive Trailing Edge: Specifications, Aerodynamics, and Exploitation

Abstract

ATE functional aim is to modify the wing TE shape at high speed in order to obtain an improvement in lift over drag (LoD) ratio in the whole flight envelope, virtually obtaining a wing working always at its actual LoD optimum level. This allows to compensate the weight reduction following the fuel burning and to increase climb and descent A/C performance levels. Initial morphed shapes specification has been obtained by a multidisciplinary optimization process matching the aerodynamic performances and structural loads on wing with a defined level of structural strain for an acceptable duration of skin material life cycle. The so obtained different wing seamless shapes have been further parametrically investigated from aerodynamic point of view so to obtain the most profitable device span and chord extension. Based on these requirements, a full-scale ATE functional concept demonstrator has been designed, sized, and realized, based on reference wing geometry of a 130 Pax jet engines regional A/C with a range of 3000 nautical miles, cruise Mach 0.75, and flight level 35,000 ft. Reference wing aerodynamic studies show the best ATE performances in a relatively high CL range (above 0.5) and for Mach below 0.6. Additional exploitation of ATE has been performed on a light business jet, designed to carry 4 passengers at a speed of Mach 0.65, or fly 1200 nm with 2 passengers. CL range of this A/C is relatively small (below 0.6). In this wing working range, the ATE application seems not to be effective.