| |
Phenomenological Analysis
(Figure 28.4)
|
|
| |
Transition Reynolds number |
| Fuel-air |
Retransition
|
Acetylene, C2H2
|
9500 |
Propane, C3H8
|
9500
|
City gas
|
3500
|
Carbon monoxide, CO
|
4800
|
Hydrogen, H2
|
2000
|
| |
- Laminar flame height increases linearly with nozzle velocity.
- The increase is observed until turbulent mixing occurs.
- This situation occurs at the flame tip and moves down as velocity increases.
- The position of transition from laminar to turbulent is called break point.
- Break point remains constant beyond certain velocity.
- The transition Reynolds number is different for different fuels.
|
| |
|
