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|MANUFACTURER||Armfield (manufacturer's website)|
|MODEL||Hydraulics Bench inc. Losses in Bends & Bernoulli Armfield|
|AVAILABILITY||Official workshop hours are: 9:30 to 12.30 and 13.30 to 16:30 (in practice technicians are often available outside of these times)|
|CONTACT 1||External enquiries: Martine Dobson - Funding, Development & Support|
|CONTACT 2||Internal enquiries: Paul Critchley - Principal Technician|
|Enquire about this item|
|SITE||Media Factory Site|
The F1-22 Energy Losses in Bends accessory permits losses in different bends, a sudden contraction, sudden enlargement and a typical control valve to be demonstrated.
The equipment is mounted on a free-standing framework which supports the test pipework and instrumentation.
The following typical pipe fittings are incorporated for study: mitre bend, 90° elbow, sweep bends (large and small radius), sudden contraction and sudden enlargement.
All are instrumented with upstream and downstream pressure tappings. These tappings are connected to a bank of twelve water manometer tubes, mounted on the framework. Pressurisation of the manometers is facilititated by a hand pump.
A gate valve is used to control the flow rate. A separate gate valve is instrumented with upstream and downstream pressure tappings which are connected to a differential gauge on the edge of the framework.
The Bernoulli's Theorem Demonstration accessory illustrates those circumstances to which Bernoulli's Theorem may be applied. Also, separately, why in other circumstances the theorem gives an inadequate description of the fluid behaviour.
The test section consists of a classical Venturi machined in clear acrylic. A series of wall tappings enable measurement of the static pressure distribution along the converging duct, while a total head tube is provided to traverse along the centre line of the test section.
These tappings are connected to a manometer bank incorporating a manifold with air bleed valve. Pressurisation of the manometers is facilitated by a hand pump.
The test section is arranged so that the characteristics of flow through both a converging and diverging section can be studied. Water is fed through a hose connector and is controlled by a flow regulator valve at the outlet of the test section. The Venturi can be demonstrated as a means of flow measurement and the discharge coefficient can be determined.
Images and text courtesy of Armfield Ltd. (http://discoverarmfield.com)
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Last Updated: 8th November, 2016