Instantaneous Emission Spectra of Epoxypropane in the Process of Deflagration to Detonation Transition
LI Ping1, 2, YUAN Chang-ying2, 4, HU Dong2, 3, LIU Jun-chao2, SUN Zhu-mei2, 3, DONG Shi2, 3, XIAO Hai-bo1
1. Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China 2. Institute of High Temperature and High Pressure Physics, Sichuan University, Chengdu 610065, China 3. Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621900, China 4. Physics Department, Southwest University of Science and Technology, Mianyang 621002, China
Abstract：Using an intensified CCD spectroscopic detector (Princeton Instruments, ICCD PI-Max 1024 RB) which can be gated in as little as 5 ns, the synchronization of the measuring system was controlled by a digital delay generator (Stanford Research Systems, DG535), the DG535 was triggered externally by a lab-made electrical pulse generator which transformed the optical trigger signal to an electrical signal, and the light signal from the end window of an explosion shock tube was delivered by an 1 mm in diameter plastic optical fiber to the entrance slit of the spectrometer (grating of 150 g·mm-1, central wavelength of 550 nm)． The spectrum measurement of the epoxypropane in the process of deflagration to detonation transition (DDT) was then made. The instantaneous emission spectra of epoxypropane at different time of the DDT process with an exposure time of several microseconds were acquired. Results show that at the beginning of the DDT process, the emitted light was very weak and the line spectra of atoms were observed mainly; in the middle process of the DDT, the emitted light became strong and the spectra observed consisted of line spectra of atoms, band spectra of molecules plus continuous spectrum of the thermal radiation; when the detonation was formed, the emitted light got very strong, and the spectra acquired consisted of both line spectra of atoms and band spectra of molecules superimposed on the strong continuum of the thermal radiation.
李 萍1，2，袁长迎2，4，胡 栋2，3，刘俊超2，孙珠妹2，3，董 石2，3，肖海波1 . 环氧丙烷爆燃转爆轰过程的瞬态发射光谱 [J]. 光谱学与光谱分析, 2004, 24(07): 784-786.
LI Ping1, 2, YUAN Chang-ying2, 4, HU Dong2, 3, LIU Jun-chao2, SUN Zhu-mei2, 3, DONG Shi2, 3, XIAO Hai-bo1 . Instantaneous Emission Spectra of Epoxypropane in the Process of Deflagration to Detonation Transition. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2004, 24(07): 784-786.
[1] LIU Cai-xue, HU Donｇ，ＷANG Yonｇ-ｇｕo et al(刘才学，胡 栋，王永国等). Spectroscopy and Spectral Analysis(光谱学与光谱分析)，1994，14(3)：13. [2] HU Dong et al(胡 栋等). Acta Optica Sinica(光学学报)，1993，13(9)：835. [3] WANG Yong-guo et al(王永国等). Chinese Journal of Atomic and Molecular Physics(原子与分子物理学报)，1997，14(1)：81. [4] Lifshitｚ A，Tambｕrｕ C. J. Phys. Chem.，1994，98(4)：1161.
