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This paper presents a three-dimensional airframe design methodology for low noise emission and high fuel efficiency, based on a blended-wing-body type aircraft. The design methodology uses a combination of high and low fidelity tools to assess the performance and acoustics of the aircraft. Three-dimensional view of the current Silent Aircraft eXperimental airframe design. The Silent Aircraft Initiative (SAI), a collaborative effort between the Massachusetts Institute of Technology and the University of Cambridge funded by the Cambridge-MIT Institute, aims to design an aircraft inaudible outside the airport boundary within a well populated, urban environment. To achieve this step change in noise reduction, noise has to become a primary variable in the aircraft design process. Aerodynamic and acoustic design tools have to be combined to achieve the noise goal, and the tradeoff between cruise L/D and approach noise must be assessed to understand what penalty is paid. This paper presents a novel design methodology that unites three-dimensional aerodynamic design with aircraft operations and aeroacoustic considerations. Schematic representation of the quasi-inverse, three-dimensional design process used to create the airframe in Figure 1. The framework is comprised of three main components: three-dimensional airframe generation, cruise performance analysis, and approach performance analysis. Define the detailed three-dimensional aerodynamic aircraft design for low approach noise levels and competitive cruise
performance using the established design framework and enabling technologies such as for example thrust vectoring and leading edge
camber. Three-Dimensional Computational Fluid Dynamics. Two-Dimensional Airfoil Design, Approach Performance Analysis.
Tags : computational fluid dynamics, airframe design, three dimensional design, massachusetts institute of technology, thrust vectoring, silent aircraft initiative, low fidelity, design methodology, novel design, blended wing body, airfoil design, university of cambridge, noise emission, design framework, acoustic design
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