Challenge of design exploration for small blended wing body using unstructured flow solver

In this study, the conceptual design and the aerodynamic shape optimization of a 150 PAX class blended wing body type aircraft, which was named as Novel-Wing-Body (NWB), is discussed. The modified geometry parameterization is developed based on authors’ previous study for the planform design. The airfoil is defined to obtain better aerodynamic performance based on NASA-SC(2)0711. In addition, double-tapered wing is employed for outboard wing to arrow of higher sweepback angle without increasing the structured weight. The aerodynamic design exploration is carried out with this modified geometry representation. According to the design exploration result, it is found that the most solutions show better performance than that of the best solution obtained by previous study, and it is also suggests that the promising designs has large sweep back and, the sharp fuselage-nose.

► The aerodynamic shape optimization of a small BWB was successfully carried out.
► It was useful to employ NASA-SC(2)0711 for accruing better aerodynamic performance.
► According to the 3D design, it was found that many solutions show good performance.
► The promising designs have large sweep back wing and the sharp fuselage-nose.
► The BWB can be one of the promising concepts for the future regional aircraft.