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Study on the Mechanism of the Micro-Charge-Detonation-Driven Flyer
Shuang Li1, Jie Ren2, Chang Leng1
1State Key Laboratory of Explosion Science and Technology, School of Mechatronical Engineering, Beijing Institute of Technology, Beijing 100081, China.
Micromachines
|April 26, 2025
Summary
This study optimized micro-charge flyer performance by analyzing energy transfer. Optimal flyer thickness is 30-70 μm, with charge density and acceleration chamber dimensions critical for maximizing flyer velocity.
Area of Science:
- Materials Science
- Explosives Engineering
- Computational Physics
Background:
- Micro-explosive initiators are crucial for driving flyers in various applications.
- Understanding energy transfer in micro-charges is key to optimizing performance.
- Existing research often lacks detailed analysis of micro-charge-driven flyer dynamics.
Purpose of the Study:
- To investigate energy transfer mechanisms in micro-explosive initiator-driven flyer processes.
- To guide performance evaluation of micro-sized charges and structural design of micro-initiators.
- To determine optimal parameters for maximizing flyer velocity and kinetic energy.
Main Methods:
- Combined numerical simulations and experimental tests.
- Measurement of output pressure and detonation velocity using manganese-copper piezoresistive method and electrical probe technique.
- Development and validation of a simulation model using Photonic Doppler Velocimetry (PDV).
Main Results:
- Flyer velocity decreases with increasing thickness; optimal thickness is 30-70 μm.
- Flyer velocity increases with micro-charge density and height, up to a threshold.
- Acceleration chamber diameter significantly impacts flyer velocity, requiring careful design relative to charge diameter.
Conclusions:
- Charge conditions and structural parameters critically influence flyer velocity and morphology.
- Optimal flyer thickness and acceleration chamber dimensions are identified for enhanced performance.
- The study provides valuable insights for the design and application of micro-initiator systems.
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