Ignition and initial burning of fuel powder in a tube

Video-chromatic measurements of temperature fields during combustion of low-temperature solid propellants

“…Unlike in other photometric methods [13,15,16], in which calibration is performed regularly before each series of experiments, in the method considered here, it is sufficient to obtain it once, as a characteristic of the video system. We first calibrated the CCD matrix of the digital camera for three standard color signals using a SI-10-300 temperature lamp.…”

“…Methods for visualizing this zone by photometric processing of the final materials [15] are more informative but they allow an effective study of only the gas phase. Visualization methods have been successfully used [16] to determine local burning rates and velocities and temperature of nonstationary flows of combustion products in a model engine combustor. Later, other techniques for visualizing complex heat and mass transfer processes have emerged, for example, black-and-white recording with an automated pseudo-color image transformation [13], high-resolution thermal imagers [17], and video-chromatic measuring systems; a version of the latter is proposed in [4].…”