Armfield Engineering Education

FLUID MECHANICS

F1-10 Accessory
F1-15 Bernoulli's Theorem Demonstration - Issue 19

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.

Order Specification |
Description |
Technical Details |
Demonstration Capabilities

| Shipping Specification and Dimensions

ORDERING SPECIFICATION

• Venturi section machined from clear acrylic

• Seven static pressure tappings plus a total head measurement

• Flow control valve

• Manometer board with eight tubes

• Quick release fitting for easy connection to hydraulics bench

• Educational Software available as an option

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Description

The test section consists of a classical Venturi machined in clear acrylic. A series of wall tappings allow 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.

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Technical Details

Technical Details
item	value
Manometer range:	0 to 300mm
Number of manometer tubes:	8
Throat diameter:	10.0mm
Upstream diameter:	25.0mm
Upstream taper:	14°
Downstream taper:	21°

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Demonstration Capabilities

> Demonstrating Bernoulli's Theorem and its limitations
> Directly measuring the static and total head distribution along a Venturi tube
> Determining the meter coefficient at various flow rates

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