Key Features

• Works with Digital Hydraulic Bench for flow measurement and easy  installation
• Includes a dynamometer to load the turbine and help find the power absorbed (needs an  optional tachometer to find speed)
• Fully adjustable guide vanes with position indicator
• Includes pressure gauge to measure inlet pressure
• Transparent front so students can see what is happening
• Works with optional, free Hydraulics Data Management System Software  (HDMS)

Learning Outcomes

• Efficiency of a Francis turbine
• Performance of a Francis turbine at different flow rates
• The effect of different guide vane settings on turbine performance

Key Specifications

• 3 watt nominal power
• Band brake
• Six adjustable guide vanes
• Inlet pressure gauge
• Transparent front

Description
The Francis Turbine is a laboratory-scale reaction turbine for use with Digital Hydraulic Bench(available separately). The turbine has a sturdy base which sits on the top of the hydraulic bench. The turbine connects to the pumped supply of the hydraulic bench. The bench measures the flow rate.

A mechanical gauge measures the inlet pressure to the turbine. Adjustable guide vanes in the turbine alter the flow rate and direction of flow to the impeller (runner) of the turbine. The end of the turbine outlet tube (draft) sits in the recess in the topof the hydraulic bench. Included with the turbine is a weir plate to create a shallow reservoir in the water channel of a volumetric bench. This ensures that water covers the end of the draft tube during tests. You do not need this plate when you use the Digital Hydraulic Bench. A band brake with spring balances measures the torque at the turbine shaft.

A stroboscope with speed display ) or an optical tachometer (, available separately) can measure the speed of the turbine. The stroboscope can also ‘freeze’ the image of the turbine and water flow to improve students understanding of the turbine. Students test the turbine at different flow rates, loads and guide vane settings. They use the flow, torque, pressure and speed measurements to calculate hydraulic power input and mechanical (shaft) power at the turbine. They use these to create performance curves for the turbine. If required students can download Hydraulics Data Management System (HDMS) software onto a suitable computer (not supplied) to aid with entering, evaluating and presenting their data.
Standard Features

• Supplied with a comprehensive user guide
• Five-year warranty
• Manufactured in accordance with the latest European Union directives

Essential Base Unit

• Digital Hydraulic Bench:- This product will also work with an existing Volumetric Hydraulic Bench

Essential Ancillary

• Optical Tachometer 

Recommended Ancillary

• Stroboscope 

Typical Work Assignments
Speed, torque and power
This experiment tests the performance of the turbine with vanes fully open, and adjusted to 66% and 33% open. The results produce curves of torque and power against speed.
Hydraulics Data Management System
The HDMS is a complimentary software tool designed to help students accurately record data from experiments associated with this apparatus.

The software is intuitive and easy to use withclear and convenient data display options, enabling students to run automatic calculations and export charts and results for further investigation. 
Detailed Specifications
Is committed to a programme of continuous improvement; hence we reserve the right to alter the design and product specification without prior notice.
Nett dimensions and weight (assembled):
400 mm x 360 mm x 700 mm and 11 kg
Approximate Packed dimensions and weight ( with draft tube extension removed for packing):
0.15 m3 and 15 kg
Guide vanes:
6 off, adjustable from fully shut to fully open
Impeller:
80 mm diameter, 10 blades
Turbine speed:
Maximum 1100 rev.min–1
Turbine power:
Nominal maximum 3 Watts
Operating Conditions
Operating environment:
Laboratory
Storage temperature range:
–25°C to +55°C (when packed for transport)
Operating temperature range:
+5°C to +40°C
Operating relative humidity range:
80% at temperatures < 31°C decreasing linearly to 50% at 40°C
Sound Levels
Less than 70 dB(A)