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Armfield Engineering Education

Armfield limited engineering education equipment APPLIED FLUID MECHANICS

C4MKII Multi-Purpose Teaching Flume - Issue 1

New Accessory for
F1-10 Hydraulics Bench

The Armfield Multi-purpose Teaching Flume has been specifically designed to demonstrate the principles of fluid mechanics when applied to engineering structures in open channel flow.

The new MKII version is supplied as an accessory to the F1-10 Hydraulics Bench, and can be used with any recently supplied F1-10.

ORDERING SPECIFICATION

• A 76mm wide, 250mm high open channel for use with an F1-10 Hydraulics Bench.
• Available in 2.5m and 5.0m working section lengths.
• Clear acrylic sides to give visibility of the working section.
• A jacking system permits th e slope of the channel bed to be adjusted between -1% and +3%.
• Inlet tank with flow stilling arrangement.
• Includes a Venturi, sharp and broad crested weirs, 2 vernier level gauges, adjustable undershot weir and crump weir.
• Wide range of other models available as accessories.
• Optional flowmeter.
• Comprehensive instruction manual.

Experimental Capabilities

> Use of hook and point gauges to measure water level
> Use of a Pitot-static tube to measure flowrate (using optional C4-61)
> Learning how to apply force-momentum and steady flow energy equations to
simple flow situations
> Understanding the relationship between water level above the crest of a weir and
flowrate over the weir
> Using hydraulic structures to control level, e.g. syphon spillways
> Understanding sub-and super-critical flow and the underlying
characteristics of waves
> Hydraulic jump
> Using hydraulic structures for control of flow e.g. sluice gate
> Applying and understanding Manning's formula
> Measurement of velocity profiles (using optional C4-61)

Description

The C4MkII is a small open channel flume, available in 2.5m or 5.0m lengths, with clear acrylic sides to the working section for total visibility of the flow. The channel is fitted with a PVC inlet tank, and is designed for free discharge into the Hydraulics Bench. The flume is mounted on a rigid framework, and can be tilted by use of a calibrated screwjack, which allows accurate slope adjustment of the channel.

The inlet tank incorporates a stilling arrangement to diffuse the water flow prior to entry into the channel, ensuring smooth uniform flow. The level in the working section of the flume is controlled using an overshot weir at the discharge end.

Bed pressure tappings and fixing points for models are provided. A longitudinal scale positioned at the top of the channel allows depth gauges and Pitot-static tubes to be accurately positioned along the channel length.

The flume is designed for use with a standard Armfield F1-10 Hydraulics Bench, which provides the pumped water flow, the flow control valve and a volumetric tank for flow measurement.

Also available is an optional flowmeter which can be fitted to the C4-MkII to allow direct flow measurements to be taken.

A set of models and gauges are provided with the flume as part of the standard supply, comprising:

> Venturi flume
> Sharp and broad crested weirs
> Crump weir
> Adjustable undershot weir
> 2 Vernier level gauges

Optional educational software is available (C4-301) offering a complete teaching package of coursework. The student manually enters data in the software, which can then be used for calculations, data processing and graph plotting.

Optional models available:

C4MKII Models –
A selection of the supplied & optional models are shown here
photographs of some of the supplied & optional models enlarge

C4 - 61: Pitot tub e and manometer board
C4 - 62: Culvert fitting, one edge square, one rounded
C4 - 63: Flow splitters; central wall with various nose pieces
C4 - 64: Free overflow spillway section complete with ski jump, sloping apron and blended reverse curvature attachments
C4 - 65: Syphon spillway and air regulated syphon
C4 - 66: Model radial gate
C4 - 67: Wave generator and wave absorbing beach
C4 - 68: False floor sections for gradually varied profiles
C4 - 69: Artificially roughened bed 2.5m long section
(2 required for a 5m flume)

Technical details

Channel Dimensions: 2.5 or 5m L x 76mm W x 250mm H Channel slope adjustable between -1% and +3%:

Ordering Details

C4-MkII-2.5-10 Multi-purpose Flume, 2.5m, with basic accessories

C4-MkII-5.0-10 Multi-purpose Flume, 5m, with basic accessori es

C4-MkII-2.5-11 Multi-purpose Flume, 2.5m, with basic accessories and flowmeter

C4-MkII-5.0-11 Multi-purpose Flume, 5m, with basic accessories and flowmeter

C4-301 Educational Software

Essential Accessories

Armfield F1-10 Hydraulics Bench

Shipping specification

C4-MkII-2.5
Gross weight 330kg
Volume 2.8m3

C4-MkII-5.0
Gross weight 380kg
Volume 3.0m3

Overall dimensions

C4-MkII-2.5
Length 2.91m
Width 0.62m
Height 1.46m

C4-MkII-5.0
Length 5.41m
Width 0.62m
Height 1.46m