气体爆炸抑制技术研究

本文根据气体爆炸反应的链式反应理论 ,考虑其从点火到爆炸需要一定的成长时间 (秒级 ) ,设计安装了一套气体爆炸抑爆实验装置。在此装置中 ,用复合爆炸抑制系统 ,对液化石油气和甲醇裂解气 (主成份为 co)进行了抑爆效果实验 ,研究了干粉剂用量、干粉分散均匀度和抑爆系统干粉喷散作动时间对抑爆效果的影响 ,给出了抑爆过程的压力—时间曲线。实验结果表明 :本文所提供的抑爆技术是可行的。通过及时喷洒一定量的灭火干粉 (或水 ) ,可使石油液化气爆炸峰值压力下降 59.5% ,可使甲醇裂解气爆炸峰值压力下降 43.6% ,并最终导致燃爆熄灭。

Light Extraction Efficiency in OLED with Sub-wavelength Structures

By simulating with finite-difference time-domain(FDTD) method, it is proved that two kinds of new photonic crystal slab(PCS) structures could enhance the light extraction efficiency of OLED. By comparing the results, the most effective PCS structure with maximum light extraction efficiency(E_ r =1.99) is got. The optimized geometric parameters and optimized performance parameters of the PCS structures are also obtained.