Ultrahigh-Speed Emission Spectroscopy for Flow Analysis in Laboratory Environments

It has always been a challenge to capture enough emission spectrum data when there are short test times or developing flow. Previous intensified cameras have only been able to capture one image. This has meant that dynamic features of the flow cannot be captured with these systems; however, with advancements in cameras and intensifiers the potential of such systems has been expanded. This paper provides the initial investigation into creating a spectrometer capable of capturing data at a frame rate of 100 kHz and push for higher sample rates using a V2012 Phantom camera, HiCATT 25 and SP2300 spectrograph. The ultra-highspeed spectrometer successfully captured many images from 34 tests on X2 of spectral emissions at varying framerates and spectrometer settings. Framerates varied from 1 MHz to 20 kHz; of the tested parameters the 100 kHz shots of x2s5098 and x2s5101 provided the clearest data and are discussed in this paper. Upon analysing these images, the plotted data did indeed show that there is initially a dynamic period of approximately 60 µs before the flow settles into a steady state. This shows the need for systems such as the one discussed in this paper, as they would lead to a better understanding of high temperature dynamic flow.