Comparison of different image intensifiers used for combustion measurement

¹ CTU in Prague, FME, Department of Automotive, Combustion Engine and Railway Engineering, 16607 Prague, Czech Republic
² CTU in Prague, FME, Department of Fluid Mechanics and Thermodynamics, 16607 Prague, Czech Republic
³ J. E. Purkyně University in Ústí nad Labem, FME, Department of Machines and Mechanics, 400 01 Ústí nad Labem, Czech Republic
⁴ CTU in Prague, FME, Department of Process Engineering, 16607 Prague, Czech Republic

^* Corresponding author: Jan.Kouba@fs.cvut.cz

Published online: 28 June 2019

Abstract

This paper deals with setting of the acquisition equipment used to visualize and measure the concentration of intermediate species chemiluminescence combustion and laser-induced fluorescence. Observed intermediates such as OH, NO, CH and others have an emitted UV spectrum and their signal is very weak. For this reason, it is necessary to use a suitable image intensifier, and its proper setting and synchronization with the camera is also very important. In view of this problem, the following text deals with the appropriate setting of selected optical amplifiers with P46 and P43. Because the recording equipment can be used for both LIF and chemiluminescence, the experimentally determined setting will be performed using the OH-chemiluminescence method. This is reported by a weaker signal and creates a more stringent setup criterion. As a qualitative factor, a gradient of the image function has been selected, which plays a significant role in edge detection and therefore also in flame front position detection.