Abstract
Many industrial applications use flame impingement to obtain high heat-transfer rates. An analytical expression for the convective
part of the heat transfer of a flame jet to a plate is derived. Therefore, the flame jet is approximated by a hot inert jet. In contradiction
with existing convective heat-transfer relations, our analytical solution is applicable not only for large distances between the jet and the
plate, but also for close spacings. Multiplying the convective heat transfer by a factor which takes chemical recombination in the cold
boundary layer into account, results in an expression for the heat flux from a flame jet to the hot spot of a heated plate. Numerical and
experimental validation show good agreement.
part of the heat transfer of a flame jet to a plate is derived. Therefore, the flame jet is approximated by a hot inert jet. In contradiction
with existing convective heat-transfer relations, our analytical solution is applicable not only for large distances between the jet and the
plate, but also for close spacings. Multiplying the convective heat transfer by a factor which takes chemical recombination in the cold
boundary layer into account, results in an expression for the heat flux from a flame jet to the hot spot of a heated plate. Numerical and
experimental validation show good agreement.
| Original language | English |
|---|---|
| Pages (from-to) | 1854-1865 |
| Journal | International Journal of Heat and Mass Transfer |
| Volume | 51 |
| Issue number | 7-8 |
| DOIs | |
| Publication status | Published - 2008 |
Subject classification (UKÄ)
- Atom and Molecular Physics and Optics
Free keywords
- Phosphorescence
- Heat transfer
- Impinging flame jet
- Oxy-fuel