Abstract
The characteristics of helium jets injected normally to a swirling air flow are investigated experimentally using laser Doppler and hot wire anemometers. Two jets with jet to cross flow momentum flux ratios of 0.28 and 12.6 are examined. The jets follow a spiral path similar to that found in the swirling air flow alone. Swirl acts to decrease jet penetration, but this is being counteracted by the lighter jet fluid density which is being pressed towards the tube centre by the inward pressure gradient. The characteristics are quite different from jets discharging into a uniform crossflow at about the same momentum flux ratios, and can be attributed to the combined effects of swirl and density difference between the jet fluid and the air stream. Finally, the jets lose their identity in about fifteen jet diameters. (from authors' abstract)
| Original language | English |
|---|---|
| Journal | Experiments in Fluids |
| Volume | 5 |
| Issue number | 4 , 1987, p.255-262. |
| State | Published - 1987 |
ASJC Scopus subject areas
- Computational Mechanics
- Mechanics of Materials
- General Physics and Astronomy
- Fluid Flow and Transfer Processes