For citation:
Zuev Y. V. Influence of gas-droplet turbulent jet heating degree on its parameters. Izvestiya of Saratov University. Mathematics. Mechanics. Informatics, 2026, vol. 26, iss. 2, pp. 225-235. DOI: 10.18500/1816-9791-2026-26-2-225-235, EDN: MQCRIY
Influence of gas-droplet turbulent jet heating degree on its parameters
The article is devoted to the study of the influence of the heating degree of the gas-droplet jet with phase transitions and droplet collisions on the parameters of this jet. By the heating degree of the jet is meant the ratio of gas temperatures at the nozzle edge and in the environment. The research method is mathematical modeling. Calculations are carried out using our previously published mathematical model of a two-phase jet obtained as part of the RANS approach. In this model, the averaged equations of gas phase and droplets are written in Euler variables. Due to the fact that jet currents are self-similar, algebraic formulas are used to calculate the moments of correlation of pulsation phase parameters. Mathematical modeling considers a gas-droplet submerged jet flowing into a gas medium with a temperature significantly different from the gas temperature in the outlet section of the nozzle. The analysis of the results of the calculations showed that when the heated two-phase jet expires into a gas medium with a lower temperature, the numerical value of the heating degree of the jet does not significantly affect all the parameters of the jet. If a two-phase jet flows into a gas medium with a higher temperature than the gas temperature in the outlet section of the nozzle, the heating degree of the jet significantly affects the phase temperatures, volume concentrations and droplet sizes, as well as the intensity of phase transitions. In this case reduction of the heating degree of the jet leads to significant increase in temperature of gas, intensity of phase transitions, sharper reduction along an axis of a jet of mass flow and diameters of drops and also to increase in their volume concentrations on the site of a jet near an outlet section of the nozzle.
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