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Acta Aeronautica et Astronautica Sinica ›› 2025, Vol. 46 ›› Issue (20): 531923.doi: 10.7527/S1000-6893.2025.31923

• Special Issue: Key Technologies for Supersonic Civil Aircraft • Previous Articles    

Transition prediction and uncertainty analysis of self-developed benchmark models for supersonic laminar wings

Yayun SHI1,2(), Xinze JI3,4, Tihao YANG3,4, Pengfei WU3,4, Lu XIE5, Junqiang BAI6,7, Kaixuan FENG1,2   

  1. 1.School of Aerospace Engineering,Xi’an Jiaotong University,Xi’an 710049,China
    2.State Key Laboratory for Strength and Vibration of Mechanical Structures,Xi’an 710049,China
    3.School of Aeronautic,Northwestern Polytechnical University,Xi’an 710072,China
    4.National Key Laboratory of Aircraft Configuration Design,Xi’an 710072,China
    5.AVIC The First Aircraft Design Institute,Xi’an 710089,China
    6.Unmanned System Research Institute,Northwestern Polytechnical University,Xi’an 710072,China
    7.National Key Laboratory of Unmanned Aerial Vehicle Technology,Xi’an 710072,China
  • Received:2025-03-03 Revised:2025-03-24 Accepted:2025-04-07 Online:2025-05-20 Published:2025-05-19
  • Contact: Yayun SHI E-mail:yayunshi@xjtu.edu.cn

Abstract:

Laminar flow drag reduction is one of the key technologies for enhancing the comprehensive performance of supersonic civil aircraft. However, further research is required in its engineering application, particularly regarding the calibration of transition prediction models for supersonic laminar wings and their sensitivity to external disturbances. In this paper, two self-developed benchmark models of supersonic laminar wing are designed, one with a supersonic leading edge and the other with a subsonic leading edge. Wind tunnel test results demonstrated that the supersonic leading-edge laminar wing maintained a laminar region of 30%c to 60%c, while the subsonic leading-edge laminar wing exhibited laminar regions spanning approximately 20%c to 70%c. Experimental and numerical analysis confirmed that the eN transition prediction method, based on linear stability theory, accurately captured the transition phenomena of supersonic laminar wings, with a calibrated critical N factor of 5.2. Furthermore, the self-adaptive Kriging method was developed to quantify the impact of high-dimensional, multi-source uncertainties, including critical N factor, operating conditions, and geometry deviation on transition prediction. Uncertainty quantification analysis reveals substantial variation in the influence degree of uncertainty factors on the performance metrics of different supersonic laminar wing benchmark models. The critical N factor has the greatest influence on transition prediction for the supersonic leading-edge laminar model. For the subsonic leading-edge laminar model, Mach number disturbances have the most significant impact on transition prediction. The self-developed benchmark models for supersonic laminar wings designed in this paper, along with the calibrated critical N factor and revealed uncertainty influence mechanisms, are of significant importance for achieving precise transition prediction and aerodynamic robust design optimization for supersonic laminar wings.

Key words: supersonic laminar wings, self-developed benchmark models, transition prediction, adaptive Kriging, uncertainty analysis, transition critical

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