导航

Acta Aeronautica et Astronautica Sinica ›› 2024, Vol. 45 ›› Issue (13): 129280-129280.doi: 10.7527/S1000-6893.2023.29280

• Fluid Mechanics and Flight Mechanics • Previous Articles    

Wind tunnel experimental verification of aerodynamic control force of cross⁃shaped flexible control surface

Yihui HAN, Jun HU, Yong YU(), Jianqiao YU   

  1. School of Aerospace Engineering,Beijing Institute of Technology,Beijing 100081,China
  • Received:2023-07-07 Revised:2023-09-28 Accepted:2023-10-11 Online:2023-10-18 Published:2023-10-13
  • Contact: Yong YU E-mail:yuyong@bit.edu.cn

Abstract:

Modern warfare with complex and changeable battlefield environment requires rapid maneuvering turning ability of projectiles and missles at large angles. However,traditional aerodynamic rudders cannot meet the high maneuverability turning requirements of missile aircraft over 90°. This paper innovatively proposes a new type of flexible control mechanism—A cross-shaped flexible control surface with a large-scale expandable and variable configuration to generate excess aerodynamic control force and realize the rapid maneuvering of projectiles and missles; meanwhile,this paper analyzes the aerodynamic control force generated by a reduced scale cross-shaped flexible control surface with a variable configuration in a wind tunnel experiment. The experimental results show that,compared with the symmetrical cross-shaped flexible control surface without configuration change,the cross-shaped flexible control surface with changed configuration can be basically stabilized in the direction of the retracted control rope in cases of control rope shrinking at different mounting points. No more rotation and swing appear on the side of the mounting point. This result indicates that the cross-shaped flexible control surface with changed configuration can produce a relatively stable radial control force; quantitative analysis of the aerodynamic control force measurement values further confirms the directivity of the aerodynamic control force on the flexible surface; an available radial force with an aerodynamic coefficient of about 0.29–0.34 is produced with the incoming flow being Re=2.3×105 and the control rope contraction ratio 0.9. This research confirms the availability of the control force of the variable configuration cross-shaped flexible surface,and provides a basis for further research on the aerodynamic characteristics of the flexible control force and the design of the variable configuration control strategy.

Key words: cross-shaped flexible control surface, missile agile turning, aerodynamic control force, aerodynamic characteristics, wind tunnel experiment

CLC Number: