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Unformatted text preview: Optimization and Design Space Exploration of a Supersonic Business Jet Planform Josiah T. VanderMey 1 and Hassan J. Bukhari 2 Massachusetts Institute of Technology, Cambridge, MA, 02139 A low fidelity, response surface model is used to optimize the wing and tail geometry of a supersonic jet with regard to its profit potential in the business jet market. The model is used to rapidly asses the design space and give preliminary indication as to the performance of such aircraft. Sequential quadratic programming and simulated annealing are considered as optimization techniques. Recommendations for future study are provided. Nomenclature RSE = response surface equation SA = simulated annealing SQP = sequential quadratic programming SSBJ = supersonic business jet g = objective function G = response surface input variable = response surface coefficient = objective weight factor I. Introduction S Tarting with the introduction of the Arospatiale-BAC Concorde in the late 1960s, the vision for a viable supersonic transport aircraft has remained largely unrealized. While a supersonic transport aircraft would provide a significant reduction in travel time, the materials and technologies required to allow for these speed increases incur significant cost penalties over conventional, subsonic jets. 1 Although the average traveler may be unwilling to pay the increased ticket prices associated with supersonic aircraft, the fast paced lifestyles and deep pockets of business executives allow them to justify more expensive flights. This potential for a sustainable market has directed the focus on supersonic aircraft design to the business jet sector. In addition to its prospective feasibility, the business jet market provides further stability under variable economic conditions as well as extended applications to military, MEDEVAC, and airfreight. 2 The challenges to designing a profitable SSBJ come with the need to meet strict performance and operating requirements while maintaining sufficiently low acquisition and operating costs. Increased environmental awareness has lead to a premium being placed on low emissions and noise pollution. The creation of sonic booms in supersonic flight and the high fuel burn of supersonic engines make these requirements particularly challenging for the SSBJ. Additional performance requirements also constrain SSBJ designs. According to Chudoba et al., a feasible SSBJ should achieve a range of at least 4500 nautical miles with a cruise speed between Mach 1.4 and Mach 1.8. 1 Furthemore, the SSBJ needs to comply with existing regulations and be capable of operating out of a wide range of commercial airports. This paper describes a preliminary optimization of a SSBJ wing and tail planform geometry with respect to the potential profitability of the vehicle as a supplement to the subsonic business jet market. The optimization is based a low fidelity response surface and performance constraints are used to limit the feasible design...
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- Fall '03