Aerodynamic and trajectory characteristics of a typical mortar projectile with a deflectable nose
| Autor: | Jing-wei Li, Yu-ming Ren, Shu-shan Wang, Yue-song Mei, Xun-cheng Guo |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
0209 industrial biotechnology
Computational Mechanics 02 engineering and technology 01 natural sciences 010305 fluids & plasmas 020901 industrial engineering & automation Deflection (engineering) 0103 physical sciences Static margin Wind tunnel Physics business.industry Projectile Mechanical Engineering Metals and Alloys Aerodynamics Structural engineering Trajectory optimization Military Science Computer Science::Computer Vision and Pattern Recognition Physics::Space Physics Ceramics and Composites Pitching moment Mortar business |
| Zdroj: | Defence Technology, Vol 15, Iss 5, Pp 758-767 (2019) |
| ISSN: | 2214-9147 |
| Popis: | Deflectable nose control is a new trajectory correction method. In this paper, the aerodynamic and trajectory characteristics of a typical mortar projectile with a deflectable nose are investigated with respect to its flight conditions. Using the method of wind tunnel testing, the aerodynamic coefficients of four kinds of mortar models were measured under the conditions of different angles of attack from −10° to 10° and Mach numbers from 0.3 to 0.9. Based on the aerodynamic coefficients, the trajectory ranges at different nose deflection angles and times were calculated. Furthermore, a trajectory optimization was performed by reducing the static margin. The results and discussions show that the nose deflection provided limited lift, while the pitching moment varied significantly. The mortar obtained the extended flight range and trajectory correction ability with nose deflection. Keywords: Nose deflection, Aerodynamic characteristics, Wind tunnel test, Trajectory simulation |
| Databáze: | OpenAIRE |
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