NUMERICAL SIMULATION ON SHORT-PULSE INITIATION OF SUBMICRON TATB
The short-pulse shock initiation behavior of submicron TATB was investigated by numerical simulation. The short-duration pulses were produced by a flyer, which is droved by a PETN pellet. In simulation, the reaction rate law for the conversion of explosive to products is Lee-Tarvers three terM Ignition & Growth reactive flow model, and parameters of the model is obtained through modeling the particle velocity of TATB/LiF interface. In this model, two JWL EOS are used, one for the unreacted explosive and for the products, the later is calculated by VLWR EOS. The simulation results show that, for gave thickness flyer to initiate the submicron TATB, there is a critical flyer diameter. When the flyer diameter exceeds the critical value, the threshold flyer velocity is a constant; while below the critical value, the threshold velocity increases as the diameter decreases. For flyers with identical diameters, there is a critical thickness. When the flyer thickness is above the critical thickness, the flyer velocity needed to initiate the explosive is a constant; while the flyer thickness is less than the critical thickness, the initiating velocity increases as the flyer thickness decreases. The simulation results fit the experimental results well.
HE Bi LONG Xin-ping FENG Chang-gen
Institute of Chemical Materials, CAEP, Sichuan Mianyang 621900 China Academy of Engineering Physics, Sichuan Mianyang 621900 State Key laboratory of Explosion Science and Technology, BIT, Beijing 100081
国际会议
25th International Symposium on Ballistics(第25届国际弹道会议)
北京
英文
749-758
2010-05-17（万方平台首次上网日期，不代表论文的发表时间）