What are the aerodynamic design challenges for blended wing body aircraft?

Blended wing body (BWB) aircraft merge fuselage and wing, presenting unique challenges: Thick centerbody requires careful section design to avoid strong shocks while maintaining cabin height; Longitudinal stability without tail requires careful CG management, reflexed camber, or control surfaces; Lateral-directional stability challenged by short moment arms requiring large winglets or unconventional controls; Propulsion integration for noise shielding and efficiency; High CLmax at low sweep centerbody versus low CLmax at swept outboard; and Control authority through elevons must handle all axes. Benefits include 20-30% fuel burn reduction from reduced wetted area and structural efficiency. Analysis requires full aircraft CFD and careful stability assessment.