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Acta Aeronautica et Astronautica Sinica ›› 2025, Vol. 46 ›› Issue (20): 531935.doi: 10.7527/S1000-6893.2025.31935

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

High-fidelity numerical simulation of near-/mid-field sonic boom propagation using a space-marching method for supersonic civil aircraft

Liwen ZHANG1,2, Zhonghua HAN1,2(), Keshi ZHANG1,2, Ke SONG1,2, Wenping SONG1,2   

  1. 1.Institute of Aerodynamic and Multidisciplinary Design Optimization,School of Aeronautics,Northwestern Polytechnical University,Xi’an 710072,China
    2.National Key Laboratory of Aircraft Configuration Design,Xi’an 710072,China
  • Received:2024-03-04 Revised:2024-04-02 Accepted:2024-04-29 Online:2025-05-07 Published:2025-05-06
  • Contact: Zhonghua HAN E-mail:hanzh@nwpu.edu.cn
  • Supported by:
    National Natural Science Foundation of China(52472385);National Key Research and Development Program of China(2023YFB3002800)

Abstract:

For the numerical simulation of near-/mid-field sonic boom propagation of a supersonic civil aircraft, the conventional Computational Fluid Dynamics (CFD) using a time-marching method is computationally intensive, while the acoustic propagation method based on solving the augmented Burgers equation has difficulty in simulating velocity and density variations of three-dimensional flows. To address these problems, a high-fidelity numerical simulation method of using a space-marching approach is proposed, and an in-house code “SMFlow3D” is developed. The simulation procedure consists of three steps. First, a structured Mach-aligned grid of a conical shape is generated. Second, circumferential distributions of density, velocity, and pressure variables are extracted at one-body length distance from a supersonic aircraft, and are interpolated to the grid nodes as initial conditions. Third, within a finite difference method framework, three-dimensional steady governing equations in a curvilinear coordinate system are solved along the post-Mach cone direction using a third-order Runge-Kutta method. The developed method was applied to simulate the near-/mid-field sonic boom propagation for the JAXA Wing Body (JWB) model, which was proposed in the 2nd Sonic Boom Prediction Workshop. The predicted sonic-boom waveforms are compared with the results obtained from conventional CFD method and acoustic propagation method based on the augmented Burgers equation, validating the accuracy and effectiveness of the developed method. Furthermore, near-field simulation for a Delta Wing Body model demonstrates that, compared to conventional CFD method, the developed method reduces computational time by approximately 97.3%, while improving the precision of shock capturing. The developed method can provide support for rapid prediction of sonic boom and analysis of shock system evolution.

Key words: supersonic civil aircraft, sonic boom, sonic boom propagation, space-marching method, computational fluid dynamics

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