Increasing the uniformity of the gas-air mixture in gas transport engines makes it possible to ensure more complete combustion of fuel, reduce its specific fuel consumption and exhaust gas toxicity. There are known ways to increase uniformity, but there is no generalization of their principles and applicability for various engines. The article analyzes the existing methods and identifies their shortcomings. A method has been developed to increase the uniformity of the gas-air mixture in gas transport engines by controlling the position of the gas fuel jet in the incoming air stream. The dependence for controlling the position of the gas jet in the air flow is described. The results of experiments performed by means of computer modeling with central and distributed gas supply with different gas and air pressures are analyzed. During the experiments, the coefficient of uniformity of the gas-air mixture was determined. Separately, the depth of penetration of the gas fuel jet into the incoming air stream is estimated. Based on the simulation results, the effectiveness of the method was justified. Purpose. Development of a method for increasing the uniformity of the gas-air mixture in internal combustion transport engines. Methodology. Modeling of the movement of a methane jet in an air stream by the finite element method was used in the work. Results. A method for increasing the uniformity of the gas-air mixture using the inlet pressure of the gas as the main variable parameter is formulated and justified. Practical implications. The obtained results should be used to improve the efficiency and environmental friendliness of gas transport engines.

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The design of the nozzle on the gas injector for gas and gas-diesel engines with distributed and phased gas supply is proposed to increase the uniformity of the gas-air mixture entering the engine cylinders during the intake process. A method for calculating the flow capacity of the nozzle through the pressure drop is given, which adequately assesses the effect of the nozzle design on the gas supply conditions, which will allow adjusting the settings of the gas fuel supply system in a real engine.