动力干扰下宽体客机机翼多目标优化设计

doi:10.7527/S1000-6893.2018.22381

Abstract

Abstract: A recent effort of multi-objective wing shape optimization for a wide-body civil aircraft in Wing-Body-Pylon-powered Nacelle (WBPN) configuration is presented. Based on the momentum analysis for the flow-field of a powered-on configuration, the nominal "drag" directly from wall integration can be reasonably used as the cost function in airframe shape optimizations without thrust/drag bookkeeping. The lift losses of the baseline shape induced by pylon/nacelle and jet are calculated, and the results show the importance of considering both the installation and jet effects when designing wing shape of a wing-mounted wide-body aircraft. By running an automated optimization framework setup on a super computer, a three objective wing shape optimization process for the powered-on configuration is completed in 80 h. Nearly twenty thousand cases with 40 generations of evolution are evaluated by solving Reynolds Averaged Navier-Stokes (RANS) equations. The selected optimum has better performance of drag divergence than the baseline. A manual refinement process after automatic optimization improves both spanwise thickness variation and the distribution of sectional pressure. The drag reduction achieved under power-on configuration is also affirmed by the verification calculation under the flow through configuration.

Key words: wing-body-pylon-powered nacelle configuration, multi-objective optimization design, jet interference, Reynolds Averaged Navier-Stokes (RANS) equations, super computers

CLC Number:

V211.3

XUE Bangmeng, ZHANG Wensheng, SUN Xuewei, WU Yuang. Multi-objective wing shape optimization for a wide-body civil aircraft in wing-body-pylon-powered nacelle configuration[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2019, 40(2): 522381-522381.

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Multi-objective wing shape optimization for a wide-body civil aircraft in wing-body-pylon-powered nacelle configuration

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