Simulation Study on Ezploding Foil Initiator
Simulated investigation of the behavior of exploding foil initiator (EFI) including the electrical explosion of the thin foil and the flyer motion is presented. The technique for the simulation of foil explosion is base on calculations of non-linear resistance, volume expansion and temperature in the five phases i.e. heating of solid-state, melting, fusing, intrinsic exploding and plasma which were divided according to the foil physical state change in the exploding process. The power-time curve derived from the foil simulation was used in one-dimensional hydrodynamic code for simulating the flyer motion. Taking copper as an example, the calculated results coincide well with experimental data and those done by two-dimensional model. After taking into account the energy conversion of the foil explosion, the deviations between the simulated and LLNL experimental data for the flyer velocities lie in ±8%. The simulated curves of the flyer velocity histories coincide well with those of VISAR measurement. So our theoretical technique is more convenient and simpler for describing the design performance of EFI. And this technique also lays a foundation for optimizing EFI.
ezploding foil initiator (EFI) non-linear resistance flyer velocity power-time curve p–V plane of classical van der waals gas
FENG Changgen ZHAO Yan ZENG Qingxuan
National Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China
国际会议
2009 International Autumn Seminar on Propellants,Ezplosives and Pyrotechnics(2009国际推进剂、炸药、烟火技术秋季研讨会)
昆明
英文
1-11
2009-09-22（万方平台首次上网日期，不代表论文的发表时间）