Abstract
A theoretical analysis on the flame height of circulation-controlled firewhirls was performed with an emphasis on evaluating the influence of variable density. A circulation-controlled firewhirl was approximated as a non-premixed flame with variable density and temperature-dependent diffusivities in a steady and axisymmetric Burgers vortex. A coupling-function-based formulation is considered to describe the firewhirl by invoking the assumption of unity Lewis number. The variable density effect in enhancing the flame height was characterized by a dimensionless temperature factor multiplied to the linear relation. For the firewhirls supplied by a fuel in condensed phase the boundary conditions at the fuel surface were specified by considering the physical mechanism of Stefan flow.
| Original language | English |
|---|---|
| Pages (from-to) | 3097-3104 |
| Number of pages | 8 |
| Journal | Proceedings of the Combustion Institute |
| Volume | 36 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 1 Jan 2017 |
Keywords
- Burgers vortex
- Coupling function
- Firewhirl
- Flame height
- Variable density
ASJC Scopus subject areas
- General Chemical Engineering
- Mechanical Engineering
- Physical and Theoretical Chemistry