Axisymmetric turbulent methane jet propagation in a wake air flow under combustion at a finite velocity

Hamdamov, Muzaffar; Khujaev, I.; Bazarov, Orifjan; Isabaev, Kasimbek

doi:10.1088/1757-899x/1030/1/012163

Cited by 6 publications

(3 citation statements)

References 10 publications

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“…The investigated three-dimensional flow can be modeled in physical coordinates in the form [23][24][25][26]. Continuity equation…”

Section: Objects and Methods Of Researchmentioning

confidence: 99%

“…, 𝑢 2 3 𝑏 ⁄ , and also for the convenience of the numerical solution, mathematical transformations were carried out, which made it possible to bring the inlet section of the nozzle into a square one using 𝑦 = 𝑦 𝐿 ⁄ (the 𝐿 = 𝑎 𝑏 ⁄ ). The concentration equation ( 6) for problems of diffusion combustion is written using the conservative Schwab-Zel'dovich function [3,25,26] relative to the excess concentration 𝐶 ̿ which allows you to get rid of the source term in the concentration equation for a fourcomponent mixture and reduces the number of equations to one, i.e., in the form (6), and 𝐶 ̿ takes the value equal to 1 at the outlet of the fuel channel and 0 in the oxidizer zone.…”

Section: Objects and Methods Of Researchmentioning

confidence: 99%

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Influence of nozzle geometry on torch parameters during gas combustion

Khodjiev,

Pirimov,

Avezov

2023

E3S Web of Conf.

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In this paper, when performing and analyzing the series of calculated results of the analysis of the sides of a rectangular nozzle for the parameters of a turbulent free air jet and a flame of a propane-butane mixture based on three-dimensional parabolic Navier-Stokes bonds for multicomponent reacting jets. To estimate the turbulent viscosity, differential equations of the kinetic and dissipation of the kinetic energy of turbulence are observed with refined empirical constants that are acceptable in turbulent combustion, as in the calculations, the initial values of the kinetic energy of turbulence did not exceed 5% of the dimensionless velocity of the main jet. It was found that when an air jet flows out of a nozzle with an aspect ratio of (1:2) and (1:4) in the initial sections of the jet, its shape behaves like an ellipse and, with the distance, it turns into a round one, with dimensionless, x greater or equal to 20 for the nozzle (1:2) and x greater or equal to 30 for (1:4), and for this variant there is again a transition to an elliptical shape. Studies of the diffusion combustion of a propane-butane mixture flowing out of a rectangular nozzle with an aspect ratio of (1:2) and (1:4) showed that with the ratio of the speed of the oxidizer to fuel mu, the flame length increases when mu between 0 and 0.164, and then, with an increase of mu more than 0.41, the torch length is shortened. The axial distributions of the momentum flux density with the aspect ratio (1:4), the jet core is shortened by 2÷2.5 times, compared with the aspect ratio (1:2) with the other parameters unchanged. Setting the tangential velocity at the mouth of the nozzle (ω=6.1 m/s) leads to a decrease in the torch length by 11% compared to its value equal to zero.

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“…The investigated three-dimensional flow can be modeled in physical coordinates in the form [23][24][25][26]. Continuity equation…”

Section: Objects and Methods Of Researchmentioning

confidence: 99%

Section: Objects and Methods Of Researchmentioning

confidence: 99%

Influence of nozzle geometry on torch parameters during gas combustion

Khodjiev,

Pirimov,

Avezov

2023

E3S Web of Conf.

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“…The finite-difference representation of differential equations is feasible concerning the dimensionless equation of total enthalpy [14,15]:…”

Section: Methodsmentioning

confidence: 99%

Simulation of non-isothermal free turbulent gas jets in the process of energy exchange

Hamdamov¹,

Mirzoyev²,

Buriev³

et al. 2021

E3S Web Conf.

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This article proposes a numerical method for solving the propagation and combustion of a jet of a gas mixture in an axisymmetric satellite air stream. To model the process, the dimensionless equations of the turbulent boundary layer of reacting gases in the Mises coordinates are used. A two-layer four-point nonlinear boundary separation scheme was used to solve the problem in the Mises coordinates, and a second-order along the longitudinal coordinate was given. The iterative process was used because of the nonlinearity of the storage and displacement equations of substations. Individual results of the numerical experiment are presented.

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