入射激波诱导环氧丙烷爆炸特征研究

用自行设计激波管点火测试技术，实验研究了温度范围760-1380K间入射激波诱导下环氧丙烷的点火机理。利用激波管压力传感器测定了H*(486.1) 和O (470.5nm)随激波诱导强度变化的点火时间特征。实验结果表明：在低马赫数下氢氧自由基出现时间较接近，1.5-2.5马赫间随激波诱导强度增大而线性减小；而马赫大于2.5后，氧自由基的出现时间迅速减小，是由于高活化能的氧自由基的点火时间对强激波较敏感，而诱导强度大于3.5马赫后对两者点火影响区别就下明显了。实验数据将有益于含能材料点火时间的研究。

The explosive characteristic of propylene oxide induced by normal incident shock waves

Ignition delay times for gas-phase propylene oxide behind normal incident shock waves were experimentally investigated in the temperature range of 760 to 1380K by an incident shock tube technique to evaluate its ignition mechanism. Ignition delay times were measured using side-wall piezoelectric pressure sensors H*(486.1) and O (470.5nm) emission measurements. Experimental data indicate that the presented times of oxygen and hydrogen radicals are very near, and they linearly decreased as the shock wave strength increase during 1.5-2.5 Mach number. The presented time of oxygen radical is clearly shorten than that of hydrogen radical when shock wave strength is over 2.5 Mach number, which transmit state with a high active energy is sensitive to the high shock wave strength, and the effect of shock wave strength on the presented time will decrease after its strength is over 3.5 Mach number. Our experimental results will be useful for understand the ignition characteristic of energy material.