Description of Air Flow Bench:
The Air Flow Bench consists of a welded steel frame, Air Flow Bench - General assembly with accessories mounted on castors, and provides two work surfaces for experiments and integral storage space. A tangential fan (i.e. fitted with a narrow chord centrifugal impellor), directly driven from a single phase induction motor, provides the necessary air flow for experiments. The fan is capable of providing a flow of 500 litres/second at a static pressure rise of 800 Pascals. The ductwork supplied with the Air Flow Bench is manufactured in aluminium sections assembled by deep spigoted sockets, sealed by Oâ¢ rings and clamped by quickrelease over-centre toggle latches. The design of the ductwork allows various configurations to be assembled including the easy installation of the optional additional equipment available from DIDAC. The duct work includes flow straighteners and an adjustable discharge valve. An electrical enclosure is mounted on the upper work surface and contains the fan contactor, fan start and stop pushbuttons, and provides electrical power for optional additional equipment. The instrumentation supplied with the Air Flow Bench comprises a digital manometer, barometer, conical inlet flow measuring device, and pitot static tube for traversing the duct. An optional data logging system with various modules is available to provide 0-10V dc analogue outputs of all measurements for interfacing to a computer system.
Experimental Capability of Air Flow Bench:
Specification of Air Flow Bench:
Air Flow Bench Steel-framed bench on castors with two work surfaces and ample storage; narrow chord centrifugal fan with single phase induction motor; electrical enclosure containing fan contactor, fan start and stop pushbuttons; 60Âº by 95 mm dia. conical inlet flow measurement pipe with four pressure tappings, 9Âº-95 to 146 mm dia. conical transition piece, 380 mm long by 146 mm dia. duct fitted with honeycomb flow straightener and incorporating four pressure tappings, 285 mm long by 146 mm dia. section incorporating a 70 mm right -angled branch section fitted with blanking cap, 306 mm long by 146 mm dia. section fitted with anti-swirl vanes, 350 mm long by 146 mm dia. section fitted with outlet flow control device and incorporating four pressure tappings; instrumentation comprising traversable pitot static tube with 40-0-40 mm scale, digital manometers and dial type barometer.
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