Numerical study of the counterflow diffusion flames of methanol hydrothermal combustion: The real-fluid effects and flamelet analysis

Ren, M.; Wang, Shuzhong; Roekaerts, D.J.E.M.

doi:10.1016/j.supflu.2019.104552

Numerical study of the counterflow diffusion flames of methanol hydrothermal combustion

Title

Numerical study of the counterflow diffusion flames of methanol hydrothermal combustion: The real-fluid effects and flamelet analysis

Author

Ren, M. (TU Delft Fluid Mechanics; Xi’an Jiaotong University)
Wang, Shuzhong (Xi’an Jiaotong University)
Roekaerts, D.J.E.M. (TU Delft Fluid Mechanics)

Date

2019

Abstract

Counterflow diffusion flames of methanol hydrothermal combustion are investigated to improve the understanding of hydrothermal flames. It is indicated that the thermodynamic properties by the Peng-Robinson equation of state and the modified transport properties can reduce the flame temperature by about 500 K. The Takahashi correlation for mass diffusivity is found to be appropriate for hydrothermal combustion through comparison with the experimental data of Wellig et al. (J. Supercrit. Fluids, 2009, 49, 1). Compared to the Kolmogorov length scale in the experimental combustor, the thickness of the calculated counterflow flame is ten times larger, which means that the flame would be affected by the turbulence. The flame stable range is also reproduced well by the developed hydrothermal counterflow flame model. In the end, a Flamelet Generated Manifold (FGM) table is generated, promising to provide good closure of the non-equilibrium chemical source term in further turbulent flame simulations.

Subject

Counterflow flames
FGM (Flamelet Generated Manifold) model
Flamelet
Hydrothermal combustion
Real-fluid properties
SCWO (Supercritical Water Oxidation)

To reference this document use:

http://resolver.tudelft.nl/uuid:ca6b050f-574a-4463-baea-8c2c30e9defd

DOI

https://doi.org/10.1016/j.supflu.2019.104552

Embargo date

2021-06-13

ISSN

0896-8446

Source

The Journal of Supercritical Fluids, 152