关键词: 兵器科学与技术, 优化设计, 正交试验, 无伞末敏弹, 气动外形

Abstract:

To seek the best aerodynamic shape of S-S style wings terminal sensitive projectile (TSP), based on computational fluid dynamics and orthogonal test, the wing bent area and bent angle are optimized with source aerodynamic parameters of the S-S style TSP aerodynamic model. Then the primary and secondary relations of wing parameters which affect the aerodynamic characteristics are obtained, and one aerodynamic shape, which has the largest drag coefficient and polar torque coefficient, is determined. The results show that, compared with the initial model, the drag coefficient increases by 7. 11% and the torque coefficient increases by 15. 77%. The tower free flight tests showed that the falling speed and rota- tion speed of the optimized TSP structure are 30. 0 m/ s and 11. 5 r/ s, respectively. The falling speed, rotation speed and scanning angle of TSP stayed steady during its falling which means that the optimized aerodynamic shape can lead to steady scanning motion.

Key words: ordnance science and technology, optimum design, orthogonal test, non-parachute terminal sensitive projectile, aerodynamic shape