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A large number of studies conducted in Russia and abroad have been devoted to the development of low NOx emission gas turbine engines for aircraft and power stations. However, the continual improvement of the environmental requirements of ICAO (International Civil Aviation Organization) forces new research to be carried out to meet the future goals of reduced emissions produced by gas turbine combustors (GTE), a better understanding of the process of formation of various pollutants is required. Both empirical and theoretical approaches will be studied in this present research work to provide the exhaust concentrations of NOx emissions. In recent years different methods are already developed for this problem, one of them is associated with a theoretical approach. It is well known that correct theoretical models are economical (help’s to avoid experimental work) and can be useful for deep examination of NOx emissions generated in the combustion chamber process. The main objective of this study is to predict NOx emissions in GTE based on the mathematical simulations and chemical kinetics approach. To validate the simulation results, dispersion type optical system was developed in the laboratory. This system includes UV LED source (λ=245-280nm), single-pass absorption cell with length (L=500 mm) and spectrometer DFS-452 (spectral dispersion up to Δλ = 0.2nm/mm) equipped photo detector MORS-1 with a detection range Δλ=50nm. It allowed us to measure concentrations of some matters which absorbed light in the UVC range.

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The paper presents the thermographic investigation results of temperature fields on electrode systems of surface discharges excited on a fixed and moving dielectric layers. It is shown that temperature in the electrode systems with stationary dielectric barrier is of 28-1350C while temperature of electrode systems with a movable dielectric layer doesn’t exceed 500C. The effect of near-wall gas flows on the surface temperature distribution of electrode systems is discussed.

The analysis of testing methods for steel rod fasteners in accordance with GOST ISO 898-1-2014 has been performed. It is shown that the control of mechanical properties according to this standard is sometimes ineffective, which leads to the destruction of products during the installation of metal structures. This can be explained by the imperfection of existing control methods, as well as by the fact that when testing fasteners, the technology of their manufacture and preparation for use is not taken into account. Other methods of monitoring the mechanical properties of rod fasteners, both delivery at the manufacturer and input at the consumer, have been proposed and tested, which should be carried out on the basis of new developments in product testing, taking into account the technology from manufacture and use, as well as taking into account the phenomena of deformation aging. The new methods imply the assessment of the plastic properties of full-size products, control of the impact work using special semi-natural samples, control of the tendency to brittle fracture taking into account the structural state of the threaded section of the product, and control of the tendency to deformation aging. All the proposed methods simplify the testing process and increase the reliability of the control of the mechanical properties and reliability of steel rod fasteners.