Any steady-state operation of the engine is evaluated by qualitative and quantitative parameters. For internal combustion engines, the qualitative parameter is the speed of the crankshaft, and the quantitative parameter is the engine torque. There are functional dependencies between these parameters, the graphical representation of which is called speed characteristics. However, the transition modes of engines are much more complex than the established ones, especially in gas-diesel engines, where the relationship between the parameters of the engine and the characteristics of the gas supply units is quite complex, and the transition process is accompanied by a change in the parameters of its working process over time and is a dynamic mode.

The rate of oxidation of carbon (including its dispersed forms) has a value much higher than the rate of gasification. Therefore, in the initial part of the flame, when oxygen is still contained in the gas phase, the oxidation of soot will be the process on which the change in the size and concentration of dispersed carbon particles mainly depends. The intensity of oxidation and gasification of dispersed carbon in the flame largely depends on the development of the mixing process, determined by the aerodynamics of the fuel and air jets. The paper presents an analysis of the influence of mixing processes on the oxidation and gasification of dispersed carbon in a natural gas flame in the study of homogeneous flames and mixing of turbulent jets. The results of industrial studies of the mixing of fuel and air in a diffusion torch are taken into account. The results allow us to evaluate the influence of various aerodynamic factors on the processes occurring in the glowing flame of natural gas in the combustion chamber of gas diesel.

In agricultural premises, the air environment contains many pathogenic microorganisms. The spread of microorganisms occurs from animals, room surfaces, with ventilation air from wet feeds. Microorganisms spread over long distances with the help of aerosols. Retention of various microorganisms on aerosols can take up to four hours. To exclude infection, it is necessary to clean, disinfect and deodorize the air. The purpose of the work is to increase the efficiency of air disinfection in agricultural premises. Measurements of microbial contamination of the air were made by bacteriological culture test using Petri dishes, before and after disinfection of the air in the premises. The results were processed in a microbiological laboratory. Calculations of bactericidal efficacy were carried out. The combination of an electric air filter and an ultraviolet lamp Phillips TUV 15W/G5 T8 showed the best results of airflow disinfection. The operation of the unit does not affect animals, since the concentration of ozone released is more than five times lower than the maximum permissible concentration for animals. Consequently, animals receive dust-free and disinfected air, which leads to a decrease in animal mortality and, possibly, to an increase in their productivity.