TU Braunschweig Sustainable and Energy-Efficient Aviation SE²A
DLR - Institute of Aerodynamics and Flow Technolog
TU Braunschweig - Institute of Fluid Mechanics
TU Braunschweig - Institute of Aircraft Design and Lightweight Structures
TU Braunschweig - Institute for Joining and Welding Technology
Funding: German Research Foundation (DFG) - Project number: 390881007
Subproject of: Sustainable and Energy-Efficient Aviation SE²A
Laminarisation of aircraft wings significantly reduces friction drag, thereby increasing overall energy efficiency. To promote laminar flow, extended hybrid laminar flow control (xHLFC) concepts are being investigated, which incorporate active boundary layer suction in the rear section of the wing. When applied effectively, this suction delays the transition from laminar to turbulent flow, resulting in a greater laminar flow coverage across the wing surface and thus lower drag.
Our work focuses on the development of an additively manufactured xHLFC suction panel that integrates multiple functions into a single component. The panel is designed to feature a micro-perforated aerodynamic surface, a core structure that provides both structural support and air transport, and connector solutions for transmitting mechanical loads and suction air.
To construct the core, the project employs triply periodic minimal surface (TPMS) sheet networks, which offer advantages such as lightweight construction, omnidirectional air transport, and customizable internal pressure distributions. Building on the achievements of the previous funding phase, the current focus is on designing and fabricating the first fully functional test panels, which will undergo wind tunnel testing to validate their aerodynamic and structural performance.
For further information visit: SE²A - Sustainable and Energy-Efficient Aviation