The Vortex Apparatus enables students to produce both freeand forced vortices, and measure the vortex water surface profile. The productconsists of a transparent vessel on a support frame, which mounts on a DigitalHydraulic Bench. A low-voltage, variable-speed motor rotates the vessel aboutits vertical axis. A speed-control unit (included), sited away from the mainapparatus, controls the speed of rotation. To produce a forced vortex, studentsadd water to the rotating vessel until it is about half full. A forced vortexforms. After a few minutes the vortex becomes constant, and students canmeasure the surface profile using the traverse probe. The traverse probe canmove both horizontally and vertically, and both axes have linear scales.Students can also measure distribution of total head by replacing the traverseprobe with a Pitot tube.
Nett dimensions andweights:
Vortex vessel: 650 mm x 400 mm x 600 mm and 20 kg
Speed controller: 250 mm x 270 mm x 110 mm and 3.5 kg
Approximate packed dimensionsand weights:
0.3 m3 and 33 kg
Approximately 380 mmwide x 180 mm deep
Approximately 286 mm wide x 180 mm deep
Traverse probe and Pitot tube with scales calibrated in millimeters
Water supply:Up to 8 litres a minute
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