Investigation of the Emission and Absorption Spectra of Water Vapor

Application of high optical technologies to determine the temperature field, ingredient composition and microstructure of the dispersed phase of combustion products of energy fuels

“…To carry out studies of the optical characteristics of combustion products, spectral installations were developed for studying optically active ingredients of combustion products in the temperature range 200-2500 K with meddle and high spectral resolution, described in [10,14,15,17,22,23]. Changes in the ingredient composition of combustion products emitted into the atmosphere were carried out by sampling with subsequent spectral analysis in an analytical setup based on an upgraded IKS-31 spectrometer and an MHK-1 multi-pass cell with external and internal electric heating.…”

“…The intensity of the spectral lines of combustion products S(T) is measured as follows [10]. The measured spectrum is decomposed into the contours of individual spectral lines by the method of differential moments [21][22][23][24]. Further, the profiles obtained in this way are restored to the influence of the instrumental function of the spectrometer.…”

Numerical modeling of radiation heat exchange in combustion chambers and heat exchangers of power installations

“…When performing calculations of radiation heat transfer, a wide range of experimental studies was used, carried out on flame measuring complexes in the temperature range of 1500-2500 K and heated measuring complexes with electric heating [1][2][3][4][5][6][7][8][9][10]. As a result of these studies, the influence of non-equilibrium processes on radiation heat transfer was revealed [1][2][3], the radiation characteristics of water vapor in the spectral region 0.2-25 μm [11] were investigated, the spectral transmission functions and parameters of spectral lines were determined, and high-temperature atlases of the parameters of spectral lines of CO 2 were prepared [12].…”

“…For the formation of a short flame, it is advisable to use multi-row burners, where the supply of air and fuel alternates and is carried out through capillary tubes mounted in a matrix type burner. In Figures 5-7 show the distribution of the integral flux F (z) depending on the height in the combustion chamber, calculated using the spectral transmission functions by the two-parameter method of equivalent masses and the "weak absorption" approximation With the advent of supercomputers, it becomes possible to use numerical methods for solving radiation transfer problems [9]. Their use is limited by insufficient reliability of information on the parameters of the spectral lines of the gas components of combustion products at high temperatures, which are realized in the combustion chambers of power units.…”

“…When performing calculations of radiation heat transfer, a two-parameter method of equivalent mass was used when calculating the spectral intensities of thermal radiation [1,4,[6][7][8][9].…”