The potential for improvement of the characteristics of large caliber guns has not reached its limit. Some of the problems still to be solved are the varying velocity of rounds st different temperatures and the tailoring of the pressure profile, The limiting case is a "constant pressure" approximation. Combustion control can be applied for solving these problems, A direct input of electrical energy in the form of an electrical are in a combustion chamber is considered. For a realization of an effective combustion control this kind of energy input seems to be the favorable method in comparison to the indirect input of electrical energy e,g, plasma injection from a capillary discharge. As a baseline case a 120 mm gun and JA2 propellant are considered, The effect of radiation on the JA2 propellant, screening the radiation by the propellant grains are the key points investigated and discussed, The energy criteria for combustion control and influence of radiation an the combustion process are defined

The method of mass spectrometric method for total inspection of product tightness at atmospheric pressure is shown. This method can be applied to products of any size and configuration with a given inspection sensitivity. The method does not require vacuumizing of the monitoring objects.

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Purpose. Development of a method and forecast estimation of sulfur dioxide emission reduction during combustion of steam coal by regulating its quality during coal preparation. Methodology. Study on sulfur content in coal using sieve, fractional analysis, analysis of ash and total sulfur content. Forecasting of sulfur content in concentrate according to the developed calculation method. Production tests at the coal preparation plant. Forecasting of the level of SO2 emissions during pulverized coal combustion according to the developed calculation method. Findings. The distribution of sulfur content of Ukrainian steam bituminous coal by size classes depending on ash content is investigated; the proximity of sulfur content to the linear dependance on the ash content of the run-of-mine coal, rock-free substance, rock and concentrate is proved. The calculations of the level of SO2 emissions during pulverized combustion of coal and its cleaned products taking into account their elemental composition is performed, and the linear dependence of the level of SO2 emissions on the total sulfur content to lower heating value (LHV) ratio is proved. Based on the obtained results, methods are developed for determining the expected sulfur content in the concentrate and the forecasted level of SO2 emissions during its combustion; the optimal depth of preparation for the coal from various mines is determined by the criterion of compliance of the SO2 emission level with the current environmental standards. Originality. Proximity of the sulfur content to the linear dependence on the ash content of the run-of-mine coal, rock-free substance, rock and concentrate is proved. The linear dependence of the level of SO2 emissions on the ratio of the total sulfur content to LHV during pulverized combustion of coal and its clean products is proved. Practical value. A method has been developed for determining the expected sulfur content in the products of coal preparation by jigging, taking into account the allowable content of the high-density fraction in the concentrate and adding dense slimes to the coal preparation products. A method has been developed for determining the predicted level of SO2 emissions during their combustion. The optimal depth of the coal preparation for coal from various mines has been determined by the criterion of compliance of the level of SO2 emissions with the current environmental standards.

A detailed study of the physical processes of pulsed high-pressure, heavy-current arcs is appropriate in view of the technological progress in the application of electrothermal launchers. The results of a Fourier analysis of pressure in the electrothermal launcher are presented. The propelling gas was evolved from an organic substance. The spectral analysis of pressure curves showed the presence of radial acoustic waves in the propelling gas in the discharge chamber. These acoustic waves are revealed in a Fourier spectrum by some frequencies that shift in the measured time. The shift of the frequency is defined as given through the input of electrical energy into the discharge. The sound velocity in the propelling gas was determined according to the frequency of the radial acoustic waves.