Supervisor:
Southwest Ordnance Industry Bureau
Organizer:
Chongqing Ordnance Industry Society
Chongqing University of Technology
Chongqing University of Technology
Simulation analysis of the aerodynamic characteristics of airborne submunitions
| DOI: | 10.11809/bqzbgcxb2024.11.013 |
| Keywords: | airborne submunitions; computational fluid dynamics; simulation; aerodynamic characteristics |
| Abstract: | In order to optimize the shape of the airborne submunition, three different head shapes (flat head, concave head, convex head) were designed based on the characteristics of the submunition.Three numerical models of the submunition were established based on computational fluid dynamics (CFD) and simulation calculations were performed.The validity of the numerical model is verified by wind tunnel test.The surrounding flow field and aerodynamic characteristics of the submunition with different head shapes were compared and analyzed.The results show that low pressure areas appear on the sides and bottom of the submunition in all three models, and the flat head model has the largest range and intensity of low pressure areas; The shape of the submunition head has a significant impact only on the drag coefficient.The drag coefficient of the flat headed model is the highest and the drag dispersion is small.The pressure center is located behind the center of gravity, and the submunition is statically stable; Considering the assembly and processing technology of the submunition inside the dispenser, the flat headed model is more conducive to reducing the velocity of the projectile when the parachute opens. |
| Published: | 2024-11-30 |