Detonation Temperature Measurement of Epoxypropane Using Instantaneous Spectrum Method
LI Ying1,LI Ping1,2*,XIAO Hai-bo1,HU Dong2,3,YUAN Chang-ying2,4
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：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.
