Transactions of FAMENA, Vol. 40 No. 1, 2016.
Original scientific paper
Measurements of Air Concentration and Velocities in a Free Falling Water Jet
Freddy Florez
; Institute of Hydraulic Engineering and Water Resources Management, Vienna University of Technology, Wien Austria
Reinhard Prenner
; Institute of Hydraulic Engineering and Water Resources Management, Vienna University of Technology, Wien Austria
Norbert Krouzecky
; Institute of Hydraulic Engineering and Water Resources Management, Vienna University of Technology, Wien Austria
Abstract
The prediction of air entrainment in a free falling water jet (two-phase flow) is affected by large uncertainties. A current research project at the Vienna University of Technology is dealing with this phenomenon by means of experimental tests and CFD-calculations. The experimental investigation was conducted in order to measure the air concentration in such a free falling jet using a fibre-optic probe. The velocity was measured with a high speed camera. The tests were performed on a jet which exits a circular pipe with a diameter of 40 mm. The air concentration was measured transversally at several distances away from the nozzle exit. The test results should provide a data basis for CFD-calculations of the air entrainment in a further research step.
Keywords
air entrainment; free falling water jet; air concentration; fibre-optic probe
Hrčak ID:
155341
URI
Publication date:
8.4.2016.
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