Development of Short-Range Laminar Aircraft:Conceptual Design with Integrated System Sizing

Kurzfassung

The aviation industry is under increasing pressure to enhance sustainability by improving energy efficiency and reducing climate impact. A promising approach is to reduce aerodynamic drag using laminar flow technologies, particularly Natural Laminar Flow (NLF) and Hybrid Laminar Flow Control (HLFC). Previous research has primarily focused on aerodynamic performance, often considering only one technology at a time, using simplified HLFC system design models, and targeting long-range aircraft. This study adopted a more holistic approach by conducting a conceptual design of a short-to-medium range (SMR) aircraft equipped with both NLF and HLFC. The technologies were applied to the wing and empennage, with detailed HLFC system modelling integrated into the conceptual design process using established methods. A failure analysis was also performed to assess the performance impact of potential malfunctions. Results indicated that combining NLF and HLFC can reduce fuel consumption by 5.9 % on the design mission compared to a fully turbulent reference aircraft. Moreover, selectively applying the technologies to specific components enhances fuel savings while reducing system complexity. These findings demonstrated the potential of laminar flow technologies to improve fuel efficiency in SMR aircraft and highlight the importance of integrated aerodynamic and systems-level evaluation.