Analysis of the Impact of Shock Waves on the Safe Exit of the Rocket-assisted Vehicle Nose Cap during the Thermal Emission Process of a Concentric Canister Launcher
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摘要: 针对同心筒热发射过程冲击波对火箭助飞航行体头帽出筒安全性, 采用计算流体力学(CFD)软件数值仿真点火发射过程, 详细分析了固体火箭发动机产生的冲击波、燃气在同心筒内的传播过程, 得到了冲击波作用下头帽受力变化曲线, 揭示了头帽在冲击波作用下的筒内受力机理。通过某产品外场试验冲击波开盖过程试验数据, 进一步说明了头帽在冲击波环境下的受力变化过程。研究结果有助于清晰认识同心筒热发射过程冲击波作用下头帽受力变化机理, 可用于指导头帽出筒安全性设计。Abstract: In response to the impact of shock waves on the safety of the rocket-assisted vehicle nose cap during the concentric tube thermal launch process, computational fluid dynamics (CFD) software was used to numerically simulate the ignition and launch process. The propagation process of shock waves and gas generated by solid rocket motors in the concentric tube was analyzed in detail, and the force variation curve of the nose cap under the action of shock waves was obtained, revealing the force mechanism of the nose cap inside the tube under the action of shock waves. The test data of the shock wave opening process during the field test of a certain product further illustrates the force variation process of the nose cap in the shock wave environment. The research results contribute to a clear understanding of the mechanism of force changes on the nose cap under the shock wave during the thermal emission process of concentric cylinders, and can be used to guide the safety design of the nose cap exiting the cylinder.
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Key words:
- jet flow /
- thermal emission /
- concentric canister launcher /
- rocket-assisted vehicle /
- nose cap
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图 3 筒内马赫数分布云图(t=19.24 ms)
Figure 3. Contour of Mach number distribution inside the cylinder
图 4 筒内压强分布云图(t=19.24 ms, 受力状态: 压)
Figure 4. Contour of pressure distribution inside the cylinder
图 6 筒内压强分布云图(t=26.62 ms, 受力状态: 拔)
Figure 6. Contour of pressure distribution inside the cylinder
图 8 筒内压强分布云图(t=29.85 ms, 受力状态: 拔)
Figure 8. Contour of pressure distribution inside the cylinder
图 9 头帽内外压强分布云图(t=29.85 ms)
Figure 9. Contour of pressure distribution inside and outside the nose cap
图 10 筒内燃气质量分数云图(t=29.85 ms)
Figure 10. Contour of gas mass fraction inside the cylinder
图 13 筒内压强分布云图(t=38 ms, 受力状态: 拔)
Figure 13. Contour of pressure distribution inside the cylinder
图 14 筒内燃气质量分数云图(t=44.4 ms)
Figure 14. Contour of gas mass fraction inside the cylinder
图 15 筒内马赫数分布云图(t=44.4 ms)
Figure 15. Contour of Mach number distribution inside the cylinder
图 16 筒内压强分布云图(t=44.4 ms, 受力状态: 压)
Figure 16. Contour of pressure distribution inside the cylinder
图 18 试验头帽内外压力的无量纲曲线
Figure 18. Non dimensional curve of pressure inside and outside the test head cap
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