环氧丙烷爆燃转爆轰过程中产物C_2的发射光谱  

Emission Spectra of C _2 in the Process of Deflagration To Detonation Transition of Epoxypropane

作　　者：肖海波[1] 李萍[1] 袁长迎[2] 胡栋[3] 

机构地区：[1]四川大学原子与分子物理研究所,成都610065 [2]西南科技大学物理系,绵阳621002 [3]中国工程物理研究院流体物理研究所,绵阳621900

出　　处：《光学学报》2005年第2期261-264,共4页Acta Optica Sinica

基　　金：国家自然科学基金;中国工程物理研究院联合基金(10176020)资助课题。

摘　　要：采用具有增强功能的光谱探测器增强型电荷耦合器件(Itensified charge coupled device,ICCD)和自行设计的光电转换器,应用激波管技术对环氧丙烷爆燃转爆轰过程的发射光谱进行了拍摄,探测器快门开启时间为2μs,在500～570 nm之间进行了多次测量,由压力传感器监测的压力信号来判断爆燃转爆轰过程的重复性.实验结果表明:探测到了产物C2分子的发光光谱,它们可归属为斯旺(Swan)带的d3∏g-a3∏u跃迁中△ν=-1,0的两个振动序列.各序列的带头分别为516.52 nm,512.94 nm,563.55 nm,558.55 nm,554.07 nm,550.19 nm和544.77 nm.通过对所拍摄光谱的分析,推断中间产物C2是环氧丙烷爆燃转爆轰过程中的主要产物之一,并给出了C2自由基形成的几种可能的反应通道.The process of deflagration to detonation transition (DDT) of epoxypropane is studied in the shock tube. The study aimed to obtain the spectra information about the intermediate products of epoxypropane after fast reaction. In the experiment, by using an advanced intensified CCD spectroscopic detector and self-made electrical single pulse trigger, emission spectra of C2 with bandheads 516.52 nm, 512.94 nm, 563.55 nm, 558.55 nm, 554.07 nm, 550.19 nm, and 544.77 nm have been detected in the DDT process of epoxypropane with exposure time of 2 μs. Two vibrational band sequences (Δv=-1, 0) of d3Πg - a3Πu are identified. And the experiment is performed many times; from the pressure sign monitored by pressure sensors, it can be nearly confirmed the sameness of DDT in the 500-570 nm region. Furthermore, this experiment indicate that C2 radical is one of the main products of epoxypropane in the DDT process, and the several possible reaction passage are given, too.

关 键 词：光谱学 C2发射光谱 爆燃转爆轰 环氧丙烷 增强型电荷耦合器件探测器 

分 类 号：O433.5[机械工程—光学工程]