Abstract
Investigation of the relationship between droplet dispersion and turbulent mixing in a pressure-atomized spray flame with a recirculation region was done. Time-resolved information of instantaneous droplet velocities and interarrival-time statistics of the droplet were obtained and examined in order to observe the turbulent mixing and follow/ penetration criteria. In order to observe the detailed structure of spray flames, the size and velocity of droplets instantaneously were measured by phase Doppler anemometer. The group combustion number was calculated by the experimental data in order to elucidate the actual aspects of group combustion. It was found that the turbulent coherent structures were contributed in order to form droplet clusters of small droplets under 30 µm because of its momentum, inertia and followability. The cluster dimensions obtained corresponded with the integral scale of turbulent vortex measured. While, large droplets penetrates strongly due to large momentum and less shear flow information along the spray cone so that group combustion characteristics could not be observed. The interaction and its relation of turbulent scale and group combustion cluster was discussed with measured data for a practical oil burner of 0.1MW.
| Original language | English |
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| Publication status | Published - 1997 |
| Externally published | Yes |
| Event | 35th Aerospace Sciences Meeting and Exhibit, 1997 - Reno, United States Duration: Jan 6 1997 → Jan 9 1997 |
Other
| Other | 35th Aerospace Sciences Meeting and Exhibit, 1997 |
|---|---|
| Country/Territory | United States |
| City | Reno |
| Period | 1/6/97 → 1/9/97 |
ASJC Scopus subject areas
- Space and Planetary Science
- Aerospace Engineering