M. V. Sherstobitov

Bio: M. V. Sherstobitov is an academic researcher from Russian Academy of Sciences. The author has contributed to research in topics: Laser & Fire whirl. The author has an hindex of 3, co-authored 12 publications receiving 25 citations.

The optical method for determining the thermodynamic parameters of hot gases

Abstract: The research conducted on the thermodynamic parameters of a flame was based on its experimental transmission spectra in the 2.7 μm and 4.3 μm ranges. To produce the flame, alcohol was burned under atmospheric conditions. The hot gases resulting from the burning of ethanol (H2O, CO, and CO2) were accelerated and spun by the rotation of an impeller. The optical method developed by the authors was employed for predicting the temperature and partial pressure of the hot gases. The results demonstrate the practical significance of the method suggested. The spectroscopic database HITEMP 2010 was used for all line-by-line calculations presented in the article.

Difference Between IR Radiation Spectra of Ethanol in Free Diffusion Combustion Regime and Regime Influenced by an Air Flow in Modeling of a Fire Tornado

Abstract: Results of experimental investigations of liquid fuel combustion in the regime of a twisted jet (model of a fire tornado) are presented. Flame radiation spectra were registered. In the chosen spectral range of registration (2.2–4.8 μm), six spectral intervals were clearly traced in which the main portion of radiated energy was concentrated. Using the ratio of the sums of spectral intensities in the vicinities of the 6th and 3rd maxima, we successfully distinguished the regimes of modeled fire tornado and free diffusion fuel combustion.

Some results of experimental investigations of fire tornadoes

Abstract: Results of experimental investigations of liquid fuel combustion in the regime of a twisted jet (model of a fire tornado) are presented. To perform investigations, a stand equipped with measuring devices based on optical and thermal imaging methods has been developed and manufactured. Dependences of the geometrical characteristics, heat flux, combustion rate, and frequencies of maxima in the spectral function of the intensity fluctuations and in the centre of gravity of image of the laser beam that has passed through the tornado on the twist velocity are determined.

Investigation of optical inhomogeneities of a vortex flame

Abstract: On a laboratory scale, a vertical tornado-like flame with a height of up to 1 m and a diameter of the order of 0.05 m was investigated. A laser remote sensing of this flame at several altitudes was carried out. Fluctuations of the self-radiation of the flame in the visible range were recorded at these heights. We calculated the spectral functions of the intensity fluctuations for the probing laser beam and for the fluctuations of the self-radiation of the flame. For these spectral functions, the height dependences of the coordinates of the maxima and the coefficients of the tangent in the high-frequency region are determined.

Choice of a Spectral Range for Measuring Temperature Fields in a Flame and Recording High-temperature Objects Screened by the Flame Using IR Diagnostic Methods

Abstract: Results of experimental investigations of radiation spectra of flame produced from combustion of different fuels are presented. Based on an analysis of the spectra, the well-founded choice of spectral ranges for IR diagnostic methods is performed to measure temperature fields in the flame and to record high-temperature objects screened by the flame.

Modeling absorption spectra for detection of the combustion products of jet engines by laser remote sensing.

Abstract: The absorption spectra of exhaust gases (H2O, CO, CO2, NO, NO2, and SO2) and aerosol (soot and Al2O3) particles were modeled at different temperatures for the first time and suitable spectral ranges were determined for conducting laser remote sensing of the combustion products of jet engines. The calculations were conducted on the basis of experimental concentrations of the substances and the sizes of the aerosol particles. The temperature and geometric parameters of jet engine exhausts were also taken from the literature. The absorption spectra were obtained via the line-by-line method, making use of the spectral line parameters from the authors’ own high-temperature databases (for NO2 and SO2 gases) and the HITEMP 2010 database, and taking into account atmospheric transmission. Finally, the theoretical absorption spectra of the exhaust gases were plotted at temperatures of 400, 700, and 1000 K, and the impact of aerosol particles on the total exhaust spectra was estimated in spectral ranges suitable for remote sensing applications.

Open-Path FTIR Spectral Radiation Intensity Of Hot Combustion Gases – Measurement And Interpretation

Abstract: Spectral remote sensing is a very popular method in atmospheric monitoring. The paper presents an approach that involves mid-infrared spectral measurements of combustion processes. The dominant feature in this spectral range is CO2 radiation, which is used to determine the maximum temperature of nonluminous flames. Efforts are also made to determine the temperature profile of hot CO2, but they are limited to the laboratory conditions. The paper presents an analysis of the radiation spectrum of a non-uniform-temperature gas environment using a radiative transfer equation. Particularly important are the presented experimental measurements of various stages of the combustion process. They allow for a qualitative description of the physical phenomena involved in the process and therefore permit diagnostics. The next step is determination of a non-uniform-temperature profile based on the spectral radiation intensity with the 8 m optical path length.

The optical method for determining the thermodynamic parameters of hot gases

Abstract: The research conducted on the thermodynamic parameters of a flame was based on its experimental transmission spectra in the 2.7 μm and 4.3 μm ranges. To produce the flame, alcohol was burned under atmospheric conditions. The hot gases resulting from the burning of ethanol (H2O, CO, and CO2) were accelerated and spun by the rotation of an impeller. The optical method developed by the authors was employed for predicting the temperature and partial pressure of the hot gases. The results demonstrate the practical significance of the method suggested. The spectroscopic database HITEMP 2010 was used for all line-by-line calculations presented in the article.

Difference Between IR Radiation Spectra of Ethanol in Free Diffusion Combustion Regime and Regime Influenced by an Air Flow in Modeling of a Fire Tornado

Abstract: Results of experimental investigations of liquid fuel combustion in the regime of a twisted jet (model of a fire tornado) are presented. Flame radiation spectra were registered. In the chosen spectral range of registration (2.2–4.8 μm), six spectral intervals were clearly traced in which the main portion of radiated energy was concentrated. Using the ratio of the sums of spectral intensities in the vicinities of the 6th and 3rd maxima, we successfully distinguished the regimes of modeled fire tornado and free diffusion fuel combustion.