Abstract
The industrial valid design of a folding bull nose Krueger leading edge device will be presented. It serves as a geometrical basis for the UHURA project, which investigates the retraction and deployment process with numerical and experimental means.A set of realistic aerodynamic and kinematic requirements was applied, such as deflection angle range and deployed target position to enable insect shielding. In order to achieve an industrial relevant design solution of a Krueger device, realistic space allocation constraints and structural keep-out-zones were defined within the fixed leading edge.Numerical shape optimization of the Krueger device was performed to balance size, shape and deployed position with optimal aerodynamic performance, respecting the given requirements and constraints.Based on that, layout and sizing of the kinematic structural and connecting elements was carried out. Industrial viability was ensured by applying aerospace design rules, as well as relevant material selection, deformation and tolerance analysis.
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