Velocity Decay of High Pressure Jets
- 1 March 1987
- journal article
- research article
- Published by Taylor & Francis in Combustion Science and Technology
- Vol. 52 (1-3) , 161-171
- https://doi.org/10.1080/00102208708952575
Abstract
The velocity field in supercritical (choked and underexpanded) jets over the pressure range 2 to 75 bar has been studied using hot film anemometry. At these pressures the jet expands immediately downstream of the nozzle in order to equilibrate with ambient conditions. The behaviour of such jets is shown to be quantitatively similar to classical free jets provided that appropriate scaling parameters are employed. The experimental data also provide information on the length of the development zone where the jet cannot be described in this manner, and it is shown that this length tends to a limit as the pressure is increased.Keywords
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