BLENDED WING BODYAIRCRAFT
Gyancity Journal of Engineering and Technology
In recent years there has emerged a significant increase of interest in the design of Blended Wing Body (BWB) aircraft, specifically applied to a large commercial transport aircraft. The BWB design has been proven to have significant improvements in aerodynamic efficiency, as compared to the conventional wing fuselage design. However, due to inability to counteract significant pitching moments, there is difficulty in the design of high lift devices for BWB, especially trailing edge devices. Due
... g edge devices. Due to large wing area increased lift-to-drag ratio, it was found that, in terms of longitudinal stability, high lift devices could be successfully applied to the aircraft, which would meet the take-off and landing requirements for a field length comparable to those of current conventional large transport aircraft. The intention of the paper to study the concept and performance characteristic of BWB configuration. BWB Aircraft Blended Wing Body (BWB) aircraft have a flattened and aerofoil shaped body which form a single entity by merging fuselage with wing and tail [ fig.3 ]. BWB is a hybrid of flying-wing aircraft and the conventional aircraft where the body is designed to have a shape of an aerofoil and carefully streamlined with the wing to have a desired plan-form. In the conventional aircraft, the wing is generating the major part of the lift, whereas in BSW in addition to the wing, the fuselage is also contributing in the generation of lift, thus increasing the lifting surface area. The streamlined shape between fuselage and wing intersections reduces interference drag, reduces the wetted surface area that reduces friction drag. Since there is a slow evolution of fuselage-to-wing thickness which creates the wing root area comparatively thick which can be used for payload and fuel capacity.