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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2023, Vol. 44 ›› Issue (12): 127757-127757.doi: 10.7527/S1000-6893.2022.27757

• Fluid Mechanics and Flight Mechanics • Previous Articles    

Integrated aerodynamic and stealth optimization of aircraft based on NS/CFIE adjoint equations

Jiangtao HUANG1, Lin ZHOU1, Xian CHEN1(), Chuang MA1, Gang LIU1, Zhenghong GAO2   

  1. 1.Aerospace Technology Institute,China Aerodynamics Research and Development Center,Mianyang 621000,China
    2.School of Aeronautics,Northwest Polytechnic University,Xi’an 710072,China
  • Received:2022-07-04 Revised:2022-07-18 Accepted:2022-08-10 Online:2022-08-29 Published:2022-08-31
  • Contact: Xian CHEN E-mail:climate_2007@yeah.net
  • Supported by:
    Provincial or Ministerial Level Project

Abstract:

Advanced integrated aerodynamic and stealth design technology is the key link to realize the technical indexes of future combat aircraft, such as high stealth, high maneuverability, wide speed range and long range. This study derives the “coupled” adjoint equation of aerodynamic stealth based on the idea of interdisciplinary coupling adjoint. First, the adjoint equation of the flow field is constructed based on the Navier-Stokes equation. Through the variational processing of near-field vector multiplication, far-field vector multiplication, and the radar scattering area, the adjoint equation based on MLFMA is then developed. The electromagnetic adjoint equation of the algorithm, combined with the independently developed XSQP optimization framework and parametric modeling technology, constructs a highly reliable aerodynamic stealth comprehensive optimization technology platform. Taking a certain flying wing layout as the research object, we conduct the aerodynamic stealth integration test. The test results show that both the gradient calculation accuracy of the established accompanying platform and the optimization design efficiency are high, providing strong technical support for the aerodynamic stealth integration design of combat aircraft.

Key words: multidisciplinary coupled adjoint equation, flow adjoint equation, electromagnetic adjoint equation, integration of aerodynamics and stealth, aircraft

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