Air Flow Studies
The
equipment includes a long smooth walled pipe joined to the suction side
of an electrically operated centrifugal fan. The fan discharge pipe
terminates in a flow control damper for closed conduit work or a plate
containing a small aperture for jet dispersion measurements.
Air
enters the smooth walled pipe through one of the two flow measurement
nozzles provided. Pressure tappings along the length of the pipe permit
the pressure gradient to be determined.
A bend or mitred cascade elbow may be fitted mid way along the smooth wall pipe for comparison of pressure losses.
Boundary
layer growth is determined by the measurement of the velocity profile
at four stations along the pipe using a traversing Pitot tube.
A
conventional flow measuring orifice plate is supplied for installing in
the pipe upstream of the fan for additional demonstrations of pressure
loss and recovery.
Air jet studies are carried out on the
discharge side of the fan. A Pitot tube is traversed vertically and
horizontally at different distances from the discharge orifice to
investigate the dispersion properties.
The equipment is mounted on a
floor standing steel frame with an adjacent support for the extended
suction pipe. Pressure measurements are made on a multi-tube inclinable
manometer mounted on the support frame.
| Item | Value |
| Centrifugal fan capacity: | 218 l/s at STP |
| Pipe velocity range: | 0-35m/s |
| Inlet pipe: | dia.80mm |
| length 2.75m | |
| Interchangeable nozzles: | dia.50mm |
| and 80mm | |
| Internal pipe orifice: | dia.50mm |
| Jet discharge pipe orifice: | dia.30mm |
| Jet traverse range | 600mm x 140mm |
| (downstream lengthxwidth): | |
| Manometer range: | 0 - 283mm H2O |
| Manometer fluid: | Kerosene (s.g.0.78) |
For over four decades, Naugra has manufactured and exported workshop tools, laboratory equipment and turnkey training solutions to engineering colleges, TVET institutions, government tenders and industrial buyers across 60+ countries.
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