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Abstract
Experimental results on inclined turbulent round jets with negative buoyancy discharging in a calm homogeneous fluid are presented. Six different discharge angles from 45° to 90° to the horizontal are studied, and the jet evolution is recorded by means of a video camera. Results concern the main geometrical characteristics of the jet trajectory, i.e. the initial terminal height of rise reached by the jet at flow initiation, the final terminal height of rise observed at steady state, the horizontal distance from the source at which the terminal height is observed and the horizontal distance to the point where the jet returns at the source elevation. The densimetric Froude number at the source ranges between 7 and 60, whereas the Reynolds number is generally higher than 6000. Results are given in dimensionless form and confirm theoretical considerations obtained by dimensional analysis.
Acknowledgements
This research was conducted in the course of the Doctoral Thesis of the first author at the NTUA. His financial support through a grant of the Research Committee of NTUA is acknowledged. The contribution of Mr Manolis Lasithiotakis, Technician of the Applied Hydraulics Laboratory, to the construction of the experimental apparatus is also acknowledged.