Abstract
The effects of a flame on a shear generated turbulence and on a grid-turbulence have been investigated experimentally. A laminar fuel jet, H2-Ar mixture (volumetric ratio 1/2.5), was injected from a burner tube. The jet velocity was 5.0 m/s. The velocity of a co-flowing air stream was 7.0 m/ s and the turbulent intensity was 3.9 % and 0.54 % with and without the grid, respectively. Conclusions obtained are as follows: (1) The deceleration of mean velocity along the center line is retarded by the flame. This is mainly attributed to the suppression of turbulent mixing between the jet and the co-flowing air stream caused by the increased viscosity. (2) Though the turbulent intensity of the shear generated turbulence is suppressed significantly at the flame zone, such a significant suppression of the grid-turbulence is not observed. (3) The grid-turbulence is transported towards the center line by another mechanism than the turbulent mixing, which is dominant in the shear generated turbulence.
| Original language | English |
|---|---|
| Pages (from-to) | 471-478 |
| Number of pages | 8 |
| Journal | Transactions of the Japan Society of Mechanical Engineers Series B |
| Volume | 52 |
| Issue number | 473 |
| DOIs | |
| Publication status | Published - 1986 |
| Externally published | Yes |
Keywords
- Combustion
- Diffusion Flame
- Grid-Turbulence
- Hydrogen
- Jet
- Turbulence
- Turbulent Mixing
ASJC Scopus subject areas
- Condensed Matter Physics
- Mechanical Engineering