First, a detailed study was made of a small
full-scale nozzle in a water tunnel (Nozzle Model) in order to determine
the nozzle characteristics from both the hydraulic and vibration viewpoint.
Second, the overall dispersion pattern downstream from the injection
point was studied in a pipeline; this was called "Dispersion Model."
Nozzle Model: An overall view of this model in operation is shown
in Photo 1. Water, marked with potassium permanganate, is being injected
through the nozzle. The purpose of this model was to make as nearly full ..
sale tests as possible of the injection nozzle. The tunnel used is 13 in.
high and 12 in. wide throughout the test section and permitted velocities
up to about 16 fps. The stream, before entering the test section, is contracted
at the top in such a way that the velocity is higher at the top of
the test section than at the bottom. Thus, the flow in the tunnel represents
the portion of the velocity profile near the wall of a larger pipe. The
graph in Fig. 1 shows a comparison of the measured profiles in the tunnel
with oa1culated turbulent profiles for several representative pipes.
Harza Engineering Company, Metropolitan Water District of Southern-California
Hayden, J. W..
Model Studies of Chlorine Solution Dispersion in Turbulent Pipe Flow..
St. Anthony Falls Hydraulic Laboratory.
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