Innovative technologies are essential to enhancing an aircraft’s performance further and reduce the aviation industry’s environmental footprint. Two promising technology options that increase aerodynamic efficiency and reduce fuel consumption are hybrid laminar flow control (HLFC) and variable camber (VC). Past research indicates favorable effects when combining these two concepts onto aircraft wings; however, the influence on overall aircraft level still needs to be explored. Therefore, this work deals with the simultaneous integration of HLFC and VC inconceptual overall aircraft design.For considering the interdisciplinary dependencies of the technologies, the Multidisciplinary Integrated Conceptual Aircraft Design and Optimization environment MICADO is used. Extending this environment allows evaluation of the synergistic effects of the technology composition on an overall aircraft design level. The required level of detail in the aerodynamic performance estimation is achieved by utilizing an established process chain that combines aerodynamic information, stored in an airfoil database, with a transition prediction suite through transformation rules for both geometry and freestream conditions.In this work, methods to model and subsequently analyze the combined technology application are developed and integrated into MICADO. Since retrofitting aircraft wings with these technologies naturally limits the expected potential, a sophisticated wing design methodology, including a well-founded airfoil and sweep angle selection process, is developed. This design process utilizes the same aerodynamic database as the aerodynamic performance estimation and, thus, provides consistency for the overall aircraft design loop. The process is completed by the optional consideration of HLFC and VC as additional design criteria.Preliminary aerodynamic studies investigate the potential synergy effects between the two technologies. Afterward, application studies on the overall aircraft design level demonstrate the effectiveness of the developed processes. In the first part, both technologies are applied as an add-on solution to the wing of a turbulent CS-25 medium-range reference aircraft. The step-by-step integration of the technologies allows for a transparent identification of their individual and combined potentials. The results are promising, showing a considerable potential of 3.6% fuel reduction achieved through synergistic action. The second part expands the design space by integrating the novel design method into the design loop. The aircraft with the new wing geometry surpasses the previously identified potential from the retrofit design with a tripfuel reduction potential of 5.2%, showcasing the design capabilities and the promising effect of integrating HLFC and VC simultaneously. The work concludes with selected sensitivity studies, highlighting further optimization potential, which boosts the trip fuel reduction to over 7%, and the impact of system failure scenarios.
Simultaneous application of hybrid laminar flow control and variable camber in conceptual overall aircraft design
Simultane Applikation von hybrider laminarer Strömungskontrolle und variabler Wölbung im Flugzeugvorentwurf
01.01.2025
1 Online-Ressource : Illustrationen pages
Dissertation, Rheinisch-Westfälische Technische Hochschule Aachen, 2024; Aachen : RWTH Aachen University 1 Online-Ressource : Illustrationen (2025). = Dissertation, Rheinisch-Westfälische Technische Hochschule Aachen, 2024
Sonstige
Elektronische Ressource
Englisch
TIBKAT | 2024
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