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CAT NO: DIDACTICNLE-Export-180010
Free and Forced Vortices.
Free & Forced Vortices
The apparatus comprises a clear acrylic cylinder on a plinth designed
to produce and measure free and forced vortices. The free vortex is
generated by water discharging through an interchangeable orifice in the
base of the cylinder and the resulting profile is measured using a
combined caliper and depth scale. The forced vortex is induced by a
paddle in the base of the cylinder which is rotated by jets of water.
The
profile of the forced vortex is determined using a series of depth
gauges. Velocity at any point in the free or forced vortices may be
measured using the appropriate Pitot tube supplied. Dye crystals (not
supplied) may be used to demonstrate secondary flow at the base of the
free vortex.
Experimental Capabilities:
Understanding the difference between free and forced vortices
Determining the surface profile of a forced vortex
Determining the surface profile and total head distribution of a free vortex
Visualisation of secondary flow in free vortex
Specifications:
Cylindrical vessel with four inlet/outlet ports for free and forced vortices
Three interchangeable orifices and paddle wheel to fit in base of tank
Measuring bridge with adjustable pointers and internal caliper to measure vortex dimensions
Tank diameter: 245mm
Height to overflow point: 180mm
Orifice diameters: 8, 16 and 24mm
Forced vortex measuring probes
Distance from centre: 0, 30, 50, 70, 90 and 110mm
Pitot tubes having measuring Point (nose) at: 15, 25 and 30mm radius
Inlet tubes: 9 and 12.5mm diameter.
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