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 |
| Journal | Proceedings of the Combustion Institute |
| Volume | 36 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 2017 |
| Externally published | Yes |
Bibliographical note
Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].Research Keywords
- Burgers vortex
- Coupling function
- Firewhirl
- Flame height
- Variable density
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