Abstract
A jet, 8.73 mm diameter, was aligned concentrically with a tube 125 mm, giving a confinement area ratio of 205. The arrangement formed part of a test section of an open jet wind tunnel and gave a confinement length to jet diameter ratio of 1,700. Experiments were carried out with carbon dioxide, air and helium/air jets at different jet velocities. The turbulent shear field of an air jet was examined in more detail using hot wire anemometers. The behaviour of the jet is discussed and an equilibrium turbulent field is described in the first two diameters of the jet. This field is similar to that found in self-preserving, turbulence free jets and jets in short confinement and is independent of jet fluid densities and velocities. The near field of jets in a long confinement is very different from that found in free jets and jets in short confinements. (from authors' abstract)
| Original language | English |
|---|---|
| Journal | Experiments in Fluids |
| Volume | 5 |
| Issue number | 1 , 1987, p.2-10. |
| State | Published - 1987 |
ASJC Scopus subject areas
- Computational Mechanics
- Mechanics of Materials
- General Physics and Astronomy
- Fluid Flow and Transfer Processes