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Acta Aeronautica et Astronautica Sinica ›› 2026, Vol. 47 ›› Issue (5): 132490.doi: 10.7527/S1000-6893.2025.32490

• Fluid Mechanics and Flight Mechanics • Previous Articles    

Aerodynamic design methods for cross-domain morphing aircraft oriented to online deformation

Haipeng CHEN1, Haichuan YU1, Xiangyu GU1(), Xinwei WANG1, Xiaojiu ZHANG1, Jun CHEN2   

  1. 1.China Academy of Launch Vehicle Technology,Beijing 100076,China
    2.School of Aeronautics,Northwestern Polytechnical University,Xi’an 710072,China
  • Received:2025-06-30 Revised:2025-11-10 Accepted:2025-11-13 Online:2025-11-21 Published:2025-11-20
  • Contact: Xiangyu GU E-mail:xiangyu_gu@outlook.com
  • Supported by:
    Key Program of the National Natural Science Foundation of China(92471205)

Abstract:

Morphing aircraft, which adapt their aerodynamic shape online to meet mission demands, are a prominent research topic for maintaining high performance across wide flight envelopes. To address the challenges of integrated coordination between online/offline design variables and multi-profile heterogeneous constraints in the aerodynamic design of morphing aircraft, we develop a multi-mission aerodynamic design method for cross-domain aircraft. The proposed method parameterizes the aerodynamic shape with both online and offline variables and constructs an inner-outer dual-layer coupled optimization framework aimed at achieving a globally optimal offline shape while meeting the optimal online configurations for each flight profile. The method was applied to a variable-sweep cross-domain aircraft, and shape optimization is carried out for take-off/landing (max lift coefficient) and high-speed flight (max lift-to-drag ratio with center of pressure constraints). Depending on the objective weights, the optimized lift coefficient at Ma=0.4 increased by 55.03% and 56.85%, while lift-to-drag ratios at Ma=6.0 and Ma=10.0 increased by 1.16%, 1.69% and 0.94%, 1.68%, respectively. Crucially, the high-speed center of pressure variation was successfully controlled within the 2% design constraint in all cases. These results verify the effectiveness of the proposed optimization framework.

Key words: cross-domain morphing, multi-point design, dual-layer optimization method, shape optimization, planar shape optimization

CLC Number: