<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>In view of the powder feeding system, a multi-physical coupling model of the gas-powder-piston was established based on the Euler-Euler two-fluid model. The numerical simulation method was applied to explore the effects of dense gas-solid flow characteristics under different operating pressures. The results show that gas-solid pulsations at different operating pressures are mainly concentrated in the upper part of the powder tank. An elevated operating pressure efficiently decreases the powder layer area (ε<sub>p</sub> = 0.1) fluctuation. As the operating pressure increases from 0.5 MPa to 3.0 MPa, the rising time and fluctuation rate of pressure are reduced by 71.4% and 62.3%, respectively, and the pressure in the tank has a long stabilization period. Meanwhile, the variation of the instantaneous powder flow rate is more stable and its average value is closer to the theoretical. A high-pressure environment is more conducive to the stable transportation of powder.</p>
</abstract>

In view of the powder feeding system, a multi-physical coupling model of the gas-powder-piston was established based on the Euler-Euler two-fluid model. The numerical simulation method was applied to explore the effects of dense gas-solid flow characteristics under different operating pressures. The results show that gas-solid pulsations at different operating pressures are mainly concentrated in the upper part of the powder tank. An elevated operating pressure efficiently decreases the powder layer area (εp = 0.1) fluctuation. As the operating pressure increases from 0.5 MPa to 3.0 MPa, the rising time and fluctuation rate of pressure are reduced by 71.4% and 62.3%, respectively, and the pressure in the tank has a long stabilization period. Meanwhile, the variation of the instantaneous powder flow rate is more stable and its average value is closer to the theoretical. A high-pressure environment is more conducive to the stable transportation of powder.

Effect of elevated pressure on gas-solid flow properties in a powder feeding system

Jiangxi Key Laboratory of Micro Aero-engine

Polish Journal of Chemical Technology

This work is licensed under the Creative Commons Attribution 4.0 International License.

In view of the powder feeding system, a multi-physical coupling model of the gas-powder-piston was established based on the Euler-Euler two-fluid model. The...

Effect of elevated pressure on gas-solid flow properties in a powder feeding system

Publié en ligne: 16 oct. 2022

Pages: 41 - 52

DOI: https://doi.org/10.2478/pjct-2022-0021

Mots clés
Powder engine, Pressure effect, Dense gas-solid two-phase flow, Euler-Euler two-fluid model, Numerical simulation

© 2022 Guanlong Ren et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

Effect of elevated pressure on gas-solid flow properties in a powder feeding system

Publié en ligne: 16 oct. 2022

Pages: 41 - 52

DOI: https://doi.org/10.2478/pjct-2022-0021

Mots clésPowder engine, Pressure effect, Dense gas-solid two-phase flow, Euler-Euler two-fluid model, Numerical simulation

© 2022 Guanlong Ren et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

Mots clés
Powder engine, Pressure effect, Dense gas-solid two-phase flow, Euler-Euler two-fluid model, Numerical simulation