A UAV Ejection Device Integrating Thermal and Compressed Air Coupled Launch

Yaxiong Li; Yuming Qi; Xiumin Shi

doi:10.6919/ICJE.202604_12(4).0037

Authors

Yaxiong Li
Yuming Qi
Xiumin Shi

DOI:

https://doi.org/10.6919/ICJE.202604_12(4).0037

Keywords:

UAV Ejection; Compressed Air; Gunpowder Pressurization; Multi-Physics Coupling; Numerical Simulation.

Abstract

Aiming at the rapid take-off demand of small and medium-sized UAVs under restricted site conditions, a composite ejection device combining compressed air and gunpowder is proposed. The device combines the transient high-pressure characteristics of gunpowder gas with the controllable release characteristics of compressed air to achieve efficient acceleration of UAVs within a short stroke. Based on the LS-DYNA platform, a multi-physics field coupling numerical model including structure, gas and gas source is established, and the dynamic response characteristics under pure compressed air ejection and composite ejection are compared and analyzed. The simulation results show that under the same stroke condition, the maximum velocity and total system energy of the composite ejection scheme are significantly improved, with the maximum velocity increased by about 46% and the total system energy increased by about 5.9 times. Meanwhile, the structural stress of the UAV is lower than the allowable value of the material. The research results provide a theoretical basis for the engineering design and parameter optimization of composite energy UAV ejection devices.

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