S6-MKII Standard teaching & research flume

 

S6-MKII Standard teaching & research flume

The Armfield S6-MKII laboratory flow channel is one of the most important tools available to the hydraulics or civil engineer whether engaged in teaching basic principles or researching solutions to practical problems.

Description

The Armfield S6-MKII laboratory flow channel is one of the most important tools available to the hydraulics or civil engineer whether engaged in teaching basic principles or researching solutions to practical problems. Many applications in fluid mechanics are associated with the flow of water through an open channel where the water has a free surface that is exposed to the air at atmospheric pressure.

The flumes are available in different lengths from 5 to 15m in 2.5m and examples are installed in educational and research establishments throughout the world.

A comprehensive range of accessories, and measuring instruments is available including discharge control, wave generation and a closed loop for sediment transport studies.

  • A self-contained glass sided tilting flume for fluid mechanics laboratory experiments, project work and research activities
  • The flume working channel is assembled from modular sections of 2.5m length. A wide choice of standard lengths are available from 5m upwards
  • The flume cross-section is 300mm wide by 450mm deep
  • A fabricated high precision stainless steel bed provides excellent strength and rigidity, eliminating the need for a separate under-frame.
  • No adjustments other than the jacking stations are necessary in order to set up and maintain the equipment, achieving typical bed deformations better than 1mm
  • Each flume incorporates a discharge tank fitted with an adjustable overshot weir and draught tube to avoid splashing and noise
  • An electro-magnetic flow meter is incorporated as standard
  • A comprehensive range of optional accessories and instruments is available to supplement the capabilities of the basic flume
  • Closed-loop recirculation is an option for sediment transport studies

Engineering

The most important aspect of a tilting flume is retaining the integrity of the working section. To achieve this requires an extremely rigid design which ensures almost no deflection regardless of load or tilt.

Experiments & Research

The Armfield S6-MKII flume has been developed during 30 years of continuous production, and examples are installed in educational and research establishments throughout the world.
The flumes are available in different lengths to suit the application, short versions for basic investigations and longer versions for investigations of gradually varied flow profiles with non-uniform channel flow.

Technical Specifications

Walls: Toughened glass
Bed: Exclusively fabricated from stainless steel
End tanks: GRP (Glass Reinforced Plastic)
Sump tanks & pipework: PVC (Polyvinyl chloride) & PE (polyethylene)
Pump: Close-coupled centrifugal
Flow regulation valve: Hand wheel operated butterfly
Tilt parameters:
+ve slope 1:40 max (1.4º)
-ve slope 1:200 max (0.28º)
Flow meter: Electro-magnetic
Maximum flow rate: 30 Litres/sec
Bed stability: 1.0mm (typical) at 400mm water depth
Side wall stability: 0.5mm (typical) at 400mm water depth
Width: 0.3m
Height: 0.45m

Features & Benefits

  • Accurate for education and research
  • Designed for ease of visibility:- toughened glass sides, slimline side supports and comfortable viewing height
  • Modular construction supplied in pre-glazed sections for rapid and easy site assembly
  • Wave generation options which can be used to propagate random or regular waves in the working section

Downloads

All Armfield Teaching and research flumes can optionally be supplied with two variants of our market leading software providing Data Acquisition and optional addition of Software control.

Data Logging and Instrumentation System S6-MKII-DTA-ALITE is a software-based application with supporting hardware providing the following functionality:

  • Electronic inclinometer to measure slope of bed
  • Electronic manometer to measure: Including bed tapping’s, pressure readings from hydraulic structures
  • Differential pressure sensor for use with Pitot tube
  • Voltage input channels for use with their instrumentation
  • Thermistor sensor to measure water temperature
  • USB interface and software included to allow data logging of the above parameters. The software includes sophisticated sampling, calibration and graph plotting facilities including the ability to save or export the data in Microsoft Excel format

The S6-MKII-DTA-ASuite Software Control and Data Acquisition package includes the S6-MKII-DTA-ALITE data logging and instrumentation software and in addition incorporates an inverter within the control console for electronic speed control for the flow channel pump.

Control Functions:

  • Inverter speed control of circulating pump, either by front panel control or from a PC. When using PC control the pump speed can be set in a PID loop to maintain a constant flow rate
  • Control of powered jacking system to set specific slope of bed

Note: The S6-MKII-DTA-ASuite must be purchased at the time of order because it cannot be retrofit.

 

Accessories – S6-MkII Standard flume

A comprehensive range of accessories are available for selection. These provide the basis for a large number of practical
experiments in open channel flow including the use and operation of regulating and gauging structures.

S6-14: Power Jacking System

Tilting flumes need jacks to raise and lower them. The need for stability and the size and weight of the installation make this element of crucial importance.

Various options are available, including chain drive and hydraulic lift. None, however, give the degree of repeatable accuracy achievable with screw jacks driven through shafting and gear boxes. Long flumes need a series of jack stations carefully linked to avoid distortion of the main frame.

Armfield S6-14-Power-Jack

 

S6-35: Wave Generator

The S6-35 wave generator has a variable speed drive motor and is used to obtain regular waves.

  • Simple, regular, flap-type generator designed to be mounted on the flume discharge tank.
  • The wave generator is used to propagate waves in the working section

Note: Essential accessory S6-36 Beach

Armfield S6-35 Wave Generator

 

S6-40: Instrument Carrier

  • Position lock
  • The instrument carrier is a carriage with 3 point suspension that uses the instrument rails along the top of the flow channel to provide both longitudinal and transverse movement
  • Different instruments can be attached to the carrier using appropriate holes in the triangular plate
Armfield S6-40 Instrument Carrier

 

S6-45: Random Wave Maker

The S6-45 utilises the base hinge weir in the discharge tank of S6MkII Flume as the paddle to propagate random or regular waves in the working section

The form of waves is created using computer software via a PC that is connected to the wave maker

Note: PC not supplied

Armfield S6-45 Random Wave Maker

 

Flume Models – S6-MkII Standard flume

Non-corroding materials have been used to reduce maintenance time and increase the working life of the models.

S6-20: Plate Weir

  • Screw operated adjustable undershot plate weir (Sluice gate)
  • Mounting block, for a range of interchangeable plate weirs that are included in the supply:

Sharp crested weir (with aeration pipe) – Rectangular notch weir
Trapezoidal notch weir – 90° vee notch weir – 60° vee notch weir
Sutro notch weir (linear proportional weir)
Note: End user fabrication and use of own weirs are possible and encouraged for project work.

Armfield S6-20 Plate Weir

 

S6-21: Broad Crested Weir

  • Rectangular Sharp Cornered Weir
  • Determine the relationship between upstream head and flow-rates for water flowing over a sharp cornered BCW
  • Calculate discharge coefficients/observe flow patterns
  • Rectangular Streamlined Weir
  • Determine the effects of weir height on characteristics, critical flow conditions and required upstream water level
Armfield S6-21Broad Crest Weir

 

S6-23: Ogee Weir & Manometer Board

Eight pressure tapping’s (2 upstream, 5 downstream, 1 at apex) complete with multi-tube piezometer board.

  • Determine pressure variations at the surface of the Ogee Weir at different flow conditions and observe the flow patterns obtained
  • Determine the relationship between flow-rate and upstream head
  • Calculate the discharge coefficient
Armfield S6-23 Ogee Weir

 

S6-31: Crump Weir

Single pressure tapping at apex, complete with piezometer tube.

  • Determine the relationship between upstream head and flow-rate
  • Determine the modular limit and to observe the flow patterns obtainedDetermine the head at the apex of the weir and its relationship with flow-rate and depths upstream and downstream
  • Reinforced Apex to avoid damage
Armfield S6-31 Crump Weir

 

S6-50: Culvert

The S6-50 is used to determine the head/discharge characteristics and to determine the conditions necessary for the Culvert to run full.

Armfield S6-50 Culvert

 

S6-24: Dam Spillway Models

To observe flow patterns associated with the flow of water over a Dam Spillway. Complete with the following interchangeable downstream sections:

  • Spillway toe
  • Roller bucket toe
  • Apron with removable energy dissipater
  • Gravel Box and Stop Logs
Armfield S6-24 Dam Spillway Models

 

S6-25: Syphon Spillway

Complete with adjustable air regulation.

  • Determine the relationship between upstream head and flow-rate through a siphon spillway in the ‘Blackwater’ fully primed condition.
  • Calculate the discharge coefficient
  • Observe the operation of the siphon as it primes and de-primes
Armfield S6-25 Syphone Spillway

 

S6-26: Self-regulation Syphon

  • Determine the relationship between upstream head and flow-rate through a self-regulating (air regulated) siphon
  • Calculate the discharge coefficient
  • Observe the operation of the siphon as it primes and de-primes
Armfield S6-26 Self-Regulating Syphon

 

S6-27: Roughened Beds

  • Gravel Bed
  • Corrugated Bed

Each 2.5m long bed consists of three sections

To investigate the effect of a roughened or corrugated bed on the depth of water at different flow rates

Obtain appropriate coefficients to satisfy the Manning Formula

Armfield S6-27 Roughened-Beds

 

S6-28: Vibrating Pile

For the study of vortex shedding by piles and tall structures.

  • Investigate the effect of flow rate and Reynold’s number on the flow patterns around a vertical pipe
  • To investigate the effects of resonance on the pile
Armfield S6-28 Vibrating Pile

 

S6-29: Lift & Drag Balance with Models

Three models – large and small diameter cylinders and an aerofoil section.

  • Determine and compare the drag force on two cylinders with different diameters at different water velocities
  • Compare the drag force on a symmetrical hydrofoil and a cylinder with the same frontal area
  • Determine the lift and drag forces produced by a symmetrical hydrofoil at different angles of attack and different water velocities
Armfield S6_29-Models

 

S6-22: Venturi Flume

A set of GRP mouldings for installation in the channel section to form a venturi flume.

  • Determine the relationship between upstream head and flow-rate for water flowing through a venturi flume
  • Calculate discharge coefficient and observe the flow patten obtained
Armfield S6-22 Venturi Flume

 

S6-32: Parshall Flume

One of the most widely used methods of measuring the flow of water in open channels.

  • Investigate the flow of fluid through a Parshall flume and compare the experimental measurements with standard reference graphs
Armfield S6-32 Parshall Flume

 

S6-33: WSC Flume

Developed by Washington State College (WSC), this trapezoidal flume conforms more closely to natural channel sections and passes sediment even more freely than the Parshall Flume.

  • Investigate the flow of fluid through a WSC flume and compare the experimental measurements with standard reference graphs
  • Investigate the effect of submergence on the accuracy of measurements using a WSC Flume when the flume becomes drowned
Armfield S6-33 Washington State College Flume

 

S6-36: Beach

Wave absorption beach for use with S6-35 or S6-45 to reduce the effect of reflected waves.

Armfield S6-36 Beach

 

S6-49: Sill

  • The S6-49 is used to observe the flow patterns associated with the flow of water over different bed profile
  • It allows the behaviour of open channel flow at a reduction of flow cross-section to be investigated
Armfield S6-49 Sill

 

S6-47: Set of Piers

Investigate the backwater rise upstream of piers for both subcritical and supercritical flow around and between the piers and the effect of:

  • Geometric shape of the pier
  • High/low values of Froude number (Super/sub critical flow)
  • Opening Ratio
  • Multiple piers in combination
  • Erosion/Scour caused by piers in sediment (option S6-MKII-SL required)
  • Angle of attack when piers are not parallel with the flow
Armfield S6-47 Set of Piers

 

S6-46: Radial Gate

  • The S6-46 allows the relationship between upstream head and flow-rate beneath a radial gate under different operating conditions to be determined
  • Discharge coefficient in each condition to be calculated
Armfield S6_46 Radial Gate

S6-48: Trash Rack

The S6-48 is used to determine the head-loss associated with trash rack design with regards to geometry of the rack spacing and the bar shape.
These are designed to filter floating & submerged debris and aquatic life from waterways that may otherwise damage downstream structures for example hydroelectric equipment.

These are designed to filter floating & submerged debris and aquatic life from waterways that may otherwise damage downstream structures for example hydroelectric equipment.

Armfield S6-48 Trash Rack

 

S42 Velocity meter  & mountings

  • High speed probe supplied
  • Velocity probe and digital meter, complete with mounting bracket suitable for attachment to the S6-40
  • Orientation and height of the probe can be varied
  • Range 0.6. to 3m/sec.
Armfield S6-42 Velocity Meter

 

S6-30: Pitot Tube & Manometer Board

Complete with traversing carriage and vernier height adjustment, and an inverted paraffin water manometer for magnification of small pressure differences
Note: Requires S6-40 Instrument Carrier

Armfield S6-30 Pitot Tube & Manometer Board

 

S6-37: Zagni Flow Monitoring Systems

  • Manual Monitoring System
  • Consists of a free standing manometer board and instrument carriage fitted with Pitot tube and interconnecting tubing.
  • This system may be used to establish the basic parameters of fluid flow in the channel including:
    Invert slope
    Surface profiles
    Pressure profiles
    Velocity profiles
Armfield S6-37 Zagni Flow Monitoring System

Electrical supply: 3Ph, 50-60Hz

The user must have access to a PC
Software requires a computer running Windows XP or above with a USB port. (Computer not supplied by Armfield).

Cold Water

Packed and crated shipping specifications

Volume & Gross Weight to be confirmed at time of order

Tilting configurable modular flumes S6-MKII

Working section dimensions

Type: Tilting or standard flume

Length (in 2.5m modular increments): 5m

Width: 0.3m

Height: 0.45m

Above lists standard size flume, available in free discharge or recirculation.
Bespoke lengths and widths can also be offered.

S6 MkII flumes – cross section 300mm wide x 450mm deep
S6 MkII – 5.0m Basic self contained flume (no electrics)
S6 MkII – 7.5m Basic self contained flume (no electrics)
S6 MkII – 10m Basic self contained flume (no electrics)
S6 MkII – 12.5m Basic self contained flume (no electrics)
S6 MkII – 15m Basic self contained flume (no electrics)
S6 MkII – C 415V/3ph/50Hz – Basic electrics comprising control console & pump
S6 MkII – D 208V/3ph/60Hz – Basic electrics comprising control console & pump
S6 MkII – E 380V/3ph/50Hz – Basic electrics comprising control console & pump
S6 MkII – F 220V/3ph/60Hz – Basic electrics comprising control console & pump
S6 MkII – SL Sediment loop for any of the above flumes
S6 MkII – 14 – 1 Powered jacks for 5.0m or 7.5m flumes
S6 MkII – 14 – 2 Powered jacks for 10m or 12.5m flumes
S6 MKII – 14 – 3 Powered jacks for 15m flumes

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