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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2023, Vol. 44 ›› Issue (6): 127228-127228.doi: 10.7527/S1000-6893.2023.27228

• Fluid Mechanics and Flight Mechanics • Previous Articles    

Spatial streamwise vortex signature identification based on surface pressure information

Jianglong GUO, Yunsong GU(), Shuai LUO, Linkai LI   

  1. College of Aerospace Engineering,Nanjing University of Aeronautics & Astronautics,Nanjing 210016,China
  • Received:2022-04-01 Revised:2022-04-20 Accepted:2022-06-21 Online:2022-07-12 Published:2022-07-12
  • Contact: Yunsong GU E-mail:yunsonggu@nuaa.edu.cn
  • Supported by:
    National Numerical Windtunnel Project;National Natural Science Foundation of China(11972017);The Priority Academic Program Development of Jiangsu Education Institutions;Innovation Workstation Project of Yangzhou Institute of Shenyang Institute

Abstract:

The interaction between vortices and the object surface exists in various situations of aircraft. The vortices affect the pressure distribution on the surface and aerodynamic performance of the aircraft. The pressure distribution on the surface can reflect the spatial flow characteristics of the vortices around the aircraft. Combined with the angle of attack, sideslip angle and other flow parameters, the surface pressure distribution can predict the force state and motion trend of the aircraft. This study establishes a vortex signature identification method based on surface pressure distribution according to the theories of point vortex and “mirror vortex”. The experimental results demonstrate that the surface pressure distribution curve can characterize the spatial position (projection position and height of the vortex core distance surface) and intensity of the vortex. The correlation analysis between the spatial flow field measurement and the vortex identification result based on surface pressure distribution verifies the effectiveness of the proposed method. It has laid an important technical foundation for reconstructing the vortex flow structure around the aircraft and realizing the prediction of the aerodynamic forces of the aircraft.

Key words: vortex signature identification, vortex interaction, vortex intensity, vortex center position, correlation analysis

CLC Number: