H18 - Experiment

FRANCIS TURBINE

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A compact experiment for use with the Hydraulic Bench to demonstrate how a Francis turbine works and to test its performance.

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FRANCIS TURBINE

The Francis Turbine is a laboratory-scale reaction turbine for use with TecQuipment’s Digital Hydraulic Bench (H1F, 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) is in the open-water channel of the hydraulic bench. Included with the turbine is a weir plate to create a shallow reservoir in the water channel of the bench. This ensures that water covers the end of the draft during tests. A band brake with spring balances measures the torque at the turbine shaft. A stroboscope with speed display (ST1, available separately) or an optical tachometer (OT1, 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.

View the Digital Hydraulic Bench flyer here.

  • Efficiency of a Francis turbine
  • Performance of a Francis turbine at different flow rates
  • The effect of different guide vane settings on turbine performance
Case Study
East Tennessee State University Expand Engineering Laboratory Facilities

East Tennessee State University, which has a history of teaching engineering technology dating back to the 1930s, made the decision to expand the course offering in 2015 to include a BSc in General Engineering which combines courses from mechanical, civil and electrical engineering. To teach the course they needed an engineering laboratory that had equipment to practically teach the principles of civil and mechanical engineering. There were existing electrical engineering laboratories, to serve the BSc, in the electrical engineering technology programme. After going out to bid, TecQuipment won, based on a balance between price and functionality of equipment.

Read the full Case study here.

FRANCIS TURBINE
SUPPORTING PRODUCTS
H1F - Base Unit

A mobile self contained bench with recirculating water supply. It provides water at different flow rates direct to experiments and includes digital flow display for hydraulic and fluid mechanics experiments.

OT1 - Ancillary

A compact hand-held optical tachometer with a 5-digit high-brightness LED display and a speed range 3 to 99 999 RPM.

MFP101D - Experiment

Francis Turbine for use with the MFP101 Centrifugal Pump Module.

ST1 - Ancillary

A highly accurate and portable stroboscope providing 30 to 300,000 flashes per minute (FPM).

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