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《中国航空学报(英文版)》 2018-01
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Multipoint optimization on fuel efficiency in conceptual design of wide-body aircraft

Xiao CHAI;Xiongqing YU;Yu WANG;College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics;  
Aircraft conceptual design optimizations that maximize the performance at a design condition(single-point) may result in designs with unsatisfying off-design performance.To further improve aircraft efficiency under actual flight operations, there is a need to consider multiple flight conditions(multipoint) in aircraft conceptual design and optimization.A new strategy for multipoint optimizations in aircraft conceptual design is proposed in this paper.A wide-body aircraft is taken as an example for both single-point and multipoint optimizations with the objective of maximizing the specific hourly productivity.Boeing 787-8 flight data was used in the multipoint optimization to reflect the true objective function.The results show that the optimal design from the multipoint optimization has a 7.72% total specific hourly productivity increase of entire flight missions compared with that of the baseline aircraft, while the increase in the total specific hourly productivity from the single-point optimal design is only 5.73%.The differences between the results of single-point and multipoint optimizations indicate that there is a good option to further improve aircraft efficiency by considering actual flight conditions in aircraft conceptual design and optimization.
【Fund】: supported by the Fundamental Research Funds for Central Universities(NUAA NS2016010)
【CateGory Index】: V221
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