瞬态光谱法测量环氧丙烷爆轰温度  

Detonation Temperature Measurement of Epoxypropane Using Instantaneous Spectrum Method

作　　者：李迎[1] 李萍[1] 肖海波[1] 胡栋[2] 袁长迎[2] 

机构地区：[1]四川大学原子与分子物理研究所,四川成都610065 [2]四川大学高温高压物理研究所

出　　处：《光谱学与光谱分析》2008年第3期490-493,共4页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金委员会与中国工程物理研究院联合基金项目(10176020)资助

摘　　要：采用具有像增强功能的光谱探测器——增强型电荷耦合器件ICCD和DG535同步控制器,应用激波管技术和光纤光谱方法,由压力传感器监测爆燃转爆轰的过程,在解决了同步控制,防止误触发等问题后,从爆炸激波管的侧窗拍摄到了环氧丙烷由爆燃转变为爆轰时刻的曝光时间为2μs,分辨率达到0·2nm的瞬态发射光谱。对所测光谱进行强度定标后,可直接得到环氧丙烷爆轰时刻的热辐射背景,用黑体辐射公式按照最小二乘法原则对其进行拟合,得到了环氧丙烷的爆轰温度为2416K。此爆轰温度的获得,为进一步分析环氧丙烷爆燃转爆轰过程的微观机理提供了实验数据。After solving the problems of synchronization of the measuring system and the avoidance of false trigger signal,the instantaneous emission spectrum of epoxypropane with an exposure time of 2 μs and a resolution of 0.2 nm was acquired from a side window of a shock tube at the very moment when the epoxypropane transformed from deflagration to detonation.The measuring system consists of an advanced intensified charge-coupled-device spectroscopic detector,a digital delay generator DG535,an explosion shock tube and optical fibers.The DDT process was monitored by pressure transducers.After correcting the intensity of the spectrum obtained,the background curve of the heat radiation intensity of the detonation was given immediately.The detonation temperature of 2 416 K for epoxypropane was derived from fitting the curve with Planck blackbody formula by least squares principle.The detonation temperature of epoxypropane can provide an experimental datum for analyzing the microscopic mechanism of DDT process.

关 键 词：爆轰温度 瞬态发射光谱 增强型电荷耦合器件 环氧丙烷 

分 类 号：O433.1[机械工程—光学工程]