Mathematical modeling of gas and high-pressure cylinder temperature conditions during gas discharge from the cylinder

Uchvatova Valentina Panteleevna, Inozemtseva Valentina Sergeevna, Romanenkov Aleksandr Michailovich

The paper considers the temperature conditions of a gas and a high-pressure cylinder during the gas outflow from the cylinder. A method of mathematical modeling of heat transfer through the wall of a high-pressure balloon under non-stationary boundary conditions is presented. The algorithm allows you to set the temperature conditions of the gas and the cylinder during the flow of gas from the cylinder. The influence of the convective heat exchange coefficients of the balloon with the internal and external environment on the temperature regime of the balloon under various boundary conditions is studied. The value of the heat transfer coefficient is determined by comparing the results of mathematical modeling with the results of experiments on filling and exposure of a high-pressure cylinder. It is shown that in the range of possible values of coefficients and possible temperature differences between the internal and external environments, the temperature gradient along the wall thickness of the balloon is negligible.

Keywords:mathematical modeling, temperature regimes, heat transfer process, quasi-stationary boundary conditions, convective heat transfer coefficients, free balloons.